Merge branch 'dev' into bh1750_loop

[wifi] Add basic post-connect roaming support for stationary devices (#12809 )
[logger] Add thread-safe logging for host platform (#13010 )
2026-01-13 05:27:53 -07:00 · 2026-01-07 08:35:05 -10:00 · 2026-01-07 08:30:23 -10:00 · 2026-01-07 08:29:50 -10:00 · 2026-01-07 08:29:28 -10:00 · 2026-01-07 08:29:00 -10:00
884 changed files with 26615 additions and 12513 deletions
--- a/.clang-tidy.hash
+++ b/.clang-tidy.hash
@@ -1 +1 @@
-5969e705693278d984c5292e998df0cbaf34f7e1f04dfc7f7b7ad7168527bfa7
+191a0e6ab5842d153dd77a2023bc5742f9d4333c334de8d81b57f2b8d4d4b65e
--- a/.github/actions/restore-python/action.yml
+++ b/.github/actions/restore-python/action.yml
@@ -22,7 +22,7 @@ runs:
        python-version: ${{ inputs.python-version }}
    - name: Restore Python virtual environment
      id: cache-venv
-      uses: actions/cache/restore@0057852bfaa89a56745cba8c7296529d2fc39830 # v4.3.0
+      uses: actions/cache/restore@9255dc7a253b0ccc959486e2bca901246202afeb # v5.0.1
      with:
        path: venv
        # yamllint disable-line rule:line-length
--- a/.github/workflows/auto-label-pr.yml
+++ b/.github/workflows/auto-label-pr.yml
@@ -26,7 +26,7 @@ jobs:

      - name: Generate a token
        id: generate-token
-        uses: actions/create-github-app-token@7e473efe3cb98aa54f8d4bac15400b15fad77d94 # v2
+        uses: actions/create-github-app-token@29824e69f54612133e76f7eaac726eef6c875baf # v2
        with:
          app-id: ${{ secrets.ESPHOME_GITHUB_APP_ID }}
          private-key: ${{ secrets.ESPHOME_GITHUB_APP_PRIVATE_KEY }}
--- a/.github/workflows/ci-api-proto.yml
+++ b/.github/workflows/ci-api-proto.yml
@@ -62,7 +62,7 @@ jobs:
        run: git diff
      - if: failure()
        name: Archive artifacts
-        uses: actions/upload-artifact@330a01c490aca151604b8cf639adc76d48f6c5d4 # v5.0.0
+        uses: actions/upload-artifact@b7c566a772e6b6bfb58ed0dc250532a479d7789f # v6.0.0
        with:
          name: generated-proto-files
          path: |
--- a/.github/workflows/ci-docker.yml
+++ b/.github/workflows/ci-docker.yml
@@ -49,7 +49,7 @@ jobs:
        with:
          python-version: "3.11"
      - name: Set up Docker Buildx
-        uses: docker/setup-buildx-action@e468171a9de216ec08956ac3ada2f0791b6bd435 # v3.11.1
+        uses: docker/setup-buildx-action@8d2750c68a42422c14e847fe6c8ac0403b4cbd6f # v3.12.0

      - name: Set TAG
        run: |
--- a/.github/workflows/ci.yml
+++ b/.github/workflows/ci.yml
@@ -47,7 +47,7 @@ jobs:
          python-version: ${{ env.DEFAULT_PYTHON }}
      - name: Restore Python virtual environment
        id: cache-venv
-        uses: actions/cache@0057852bfaa89a56745cba8c7296529d2fc39830 # v4.3.0
+        uses: actions/cache@9255dc7a253b0ccc959486e2bca901246202afeb # v5.0.1
        with:
          path: venv
          # yamllint disable-line rule:line-length
@@ -152,12 +152,12 @@ jobs:
          . venv/bin/activate
          pytest -vv --cov-report=xml --tb=native -n auto tests --ignore=tests/integration/
      - name: Upload coverage to Codecov
-        uses: codecov/codecov-action@5a1091511ad55cbe89839c7260b706298ca349f7 # v5.5.1
+        uses: codecov/codecov-action@671740ac38dd9b0130fbe1cec585b89eea48d3de # v5.5.2
        with:
          token: ${{ secrets.CODECOV_TOKEN }}
      - name: Save Python virtual environment cache
        if: github.ref == 'refs/heads/dev'
-        uses: actions/cache/save@0057852bfaa89a56745cba8c7296529d2fc39830 # v4.3.0
+        uses: actions/cache/save@9255dc7a253b0ccc959486e2bca901246202afeb # v5.0.1
        with:
          path: venv
          key: ${{ runner.os }}-${{ steps.restore-python.outputs.python-version }}-venv-${{ needs.common.outputs.cache-key }}
@@ -193,7 +193,7 @@ jobs:
          python-version: ${{ env.DEFAULT_PYTHON }}
          cache-key: ${{ needs.common.outputs.cache-key }}
      - name: Restore components graph cache
-        uses: actions/cache/restore@0057852bfaa89a56745cba8c7296529d2fc39830 # v4.3.0
+        uses: actions/cache/restore@9255dc7a253b0ccc959486e2bca901246202afeb # v5.0.1
        with:
          path: .temp/components_graph.json
          key: components-graph-${{ hashFiles('esphome/components/**/*.py') }}
@@ -223,7 +223,7 @@ jobs:
          echo "component-test-batches=$(echo "$output" | jq -c '.component_test_batches')" >> $GITHUB_OUTPUT
      - name: Save components graph cache
        if: github.ref == 'refs/heads/dev'
-        uses: actions/cache/save@0057852bfaa89a56745cba8c7296529d2fc39830 # v4.3.0
+        uses: actions/cache/save@9255dc7a253b0ccc959486e2bca901246202afeb # v5.0.1
        with:
          path: .temp/components_graph.json
          key: components-graph-${{ hashFiles('esphome/components/**/*.py') }}
@@ -245,7 +245,7 @@ jobs:
          python-version: "3.13"
      - name: Restore Python virtual environment
        id: cache-venv
-        uses: actions/cache@0057852bfaa89a56745cba8c7296529d2fc39830 # v4.3.0
+        uses: actions/cache@9255dc7a253b0ccc959486e2bca901246202afeb # v5.0.1
        with:
          path: venv
          key: ${{ runner.os }}-${{ steps.python.outputs.python-version }}-venv-${{ needs.common.outputs.cache-key }}
@@ -334,14 +334,14 @@ jobs:

      - name: Cache platformio
        if: github.ref == 'refs/heads/dev'
-        uses: actions/cache@0057852bfaa89a56745cba8c7296529d2fc39830 # v4.3.0
+        uses: actions/cache@9255dc7a253b0ccc959486e2bca901246202afeb # v5.0.1
        with:
          path: ~/.platformio
          key: platformio-${{ matrix.pio_cache_key }}-${{ hashFiles('platformio.ini') }}

      - name: Cache platformio
        if: github.ref != 'refs/heads/dev'
-        uses: actions/cache/restore@0057852bfaa89a56745cba8c7296529d2fc39830 # v4.3.0
+        uses: actions/cache/restore@9255dc7a253b0ccc959486e2bca901246202afeb # v5.0.1
        with:
          path: ~/.platformio
          key: platformio-${{ matrix.pio_cache_key }}-${{ hashFiles('platformio.ini') }}
@@ -413,14 +413,14 @@ jobs:

      - name: Cache platformio
        if: github.ref == 'refs/heads/dev'
-        uses: actions/cache@0057852bfaa89a56745cba8c7296529d2fc39830 # v4.3.0
+        uses: actions/cache@9255dc7a253b0ccc959486e2bca901246202afeb # v5.0.1
        with:
          path: ~/.platformio
          key: platformio-tidyesp32-${{ hashFiles('platformio.ini') }}

      - name: Cache platformio
        if: github.ref != 'refs/heads/dev'
-        uses: actions/cache/restore@0057852bfaa89a56745cba8c7296529d2fc39830 # v4.3.0
+        uses: actions/cache/restore@9255dc7a253b0ccc959486e2bca901246202afeb # v5.0.1
        with:
          path: ~/.platformio
          key: platformio-tidyesp32-${{ hashFiles('platformio.ini') }}
@@ -502,14 +502,14 @@ jobs:

      - name: Cache platformio
        if: github.ref == 'refs/heads/dev'
-        uses: actions/cache@0057852bfaa89a56745cba8c7296529d2fc39830 # v4.3.0
+        uses: actions/cache@9255dc7a253b0ccc959486e2bca901246202afeb # v5.0.1
        with:
          path: ~/.platformio
          key: platformio-tidyesp32-${{ hashFiles('platformio.ini') }}

      - name: Cache platformio
        if: github.ref != 'refs/heads/dev'
-        uses: actions/cache/restore@0057852bfaa89a56745cba8c7296529d2fc39830 # v4.3.0
+        uses: actions/cache/restore@9255dc7a253b0ccc959486e2bca901246202afeb # v5.0.1
        with:
          path: ~/.platformio
          key: platformio-tidyesp32-${{ hashFiles('platformio.ini') }}
@@ -735,7 +735,7 @@ jobs:
      - name: Restore cached memory analysis
        id: cache-memory-analysis
        if: steps.check-script.outputs.skip != 'true'
-        uses: actions/cache/restore@0057852bfaa89a56745cba8c7296529d2fc39830 # v4.3.0
+        uses: actions/cache/restore@9255dc7a253b0ccc959486e2bca901246202afeb # v5.0.1
        with:
          path: memory-analysis-target.json
          key: ${{ steps.cache-key.outputs.cache-key }}
@@ -759,7 +759,7 @@ jobs:

      - name: Cache platformio
        if: steps.check-script.outputs.skip != 'true' && steps.cache-memory-analysis.outputs.cache-hit != 'true'
-        uses: actions/cache/restore@0057852bfaa89a56745cba8c7296529d2fc39830 # v4.3.0
+        uses: actions/cache/restore@9255dc7a253b0ccc959486e2bca901246202afeb # v5.0.1
        with:
          path: ~/.platformio
          key: platformio-memory-${{ fromJSON(needs.determine-jobs.outputs.memory_impact).platform }}-${{ hashFiles('platformio.ini') }}
@@ -800,7 +800,7 @@ jobs:

      - name: Save memory analysis to cache
        if: steps.check-script.outputs.skip != 'true' && steps.cache-memory-analysis.outputs.cache-hit != 'true' && steps.build.outcome == 'success'
-        uses: actions/cache/save@0057852bfaa89a56745cba8c7296529d2fc39830 # v4.3.0
+        uses: actions/cache/save@9255dc7a253b0ccc959486e2bca901246202afeb # v5.0.1
        with:
          path: memory-analysis-target.json
          key: ${{ steps.cache-key.outputs.cache-key }}
@@ -821,7 +821,7 @@ jobs:
          fi

      - name: Upload memory analysis JSON
-        uses: actions/upload-artifact@330a01c490aca151604b8cf639adc76d48f6c5d4 # v5.0.0
+        uses: actions/upload-artifact@b7c566a772e6b6bfb58ed0dc250532a479d7789f # v6.0.0
        with:
          name: memory-analysis-target
          path: memory-analysis-target.json
@@ -847,7 +847,7 @@ jobs:
          python-version: ${{ env.DEFAULT_PYTHON }}
          cache-key: ${{ needs.common.outputs.cache-key }}
      - name: Cache platformio
-        uses: actions/cache/restore@0057852bfaa89a56745cba8c7296529d2fc39830 # v4.3.0
+        uses: actions/cache/restore@9255dc7a253b0ccc959486e2bca901246202afeb # v5.0.1
        with:
          path: ~/.platformio
          key: platformio-memory-${{ fromJSON(needs.determine-jobs.outputs.memory_impact).platform }}-${{ hashFiles('platformio.ini') }}
@@ -885,7 +885,7 @@ jobs:
            --platform "$platform"

      - name: Upload memory analysis JSON
-        uses: actions/upload-artifact@330a01c490aca151604b8cf639adc76d48f6c5d4 # v5.0.0
+        uses: actions/upload-artifact@b7c566a772e6b6bfb58ed0dc250532a479d7789f # v6.0.0
        with:
          name: memory-analysis-pr
          path: memory-analysis-pr.json
@@ -915,13 +915,13 @@ jobs:
          python-version: ${{ env.DEFAULT_PYTHON }}
          cache-key: ${{ needs.common.outputs.cache-key }}
      - name: Download target analysis JSON
-        uses: actions/download-artifact@018cc2cf5baa6db3ef3c5f8a56943fffe632ef53 # v6.0.0
+        uses: actions/download-artifact@37930b1c2abaa49bbe596cd826c3c89aef350131 # v7.0.0
        with:
          name: memory-analysis-target
          path: ./memory-analysis
        continue-on-error: true
      - name: Download PR analysis JSON
-        uses: actions/download-artifact@018cc2cf5baa6db3ef3c5f8a56943fffe632ef53 # v6.0.0
+        uses: actions/download-artifact@37930b1c2abaa49bbe596cd826c3c89aef350131 # v7.0.0
        with:
          name: memory-analysis-pr
          path: ./memory-analysis
--- a/.github/workflows/codeql.yml
+++ b/.github/workflows/codeql.yml
@@ -58,7 +58,7 @@ jobs:

      # Initializes the CodeQL tools for scanning.
      - name: Initialize CodeQL
-        uses: github/codeql-action/init@cf1bb45a277cb3c205638b2cd5c984db1c46a412 # v4.31.7
+        uses: github/codeql-action/init@5d4e8d1aca955e8d8589aabd499c5cae939e33c7 # v4.31.9
        with:
          languages: ${{ matrix.language }}
          build-mode: ${{ matrix.build-mode }}
@@ -86,6 +86,6 @@ jobs:
          exit 1

      - name: Perform CodeQL Analysis
-        uses: github/codeql-action/analyze@cf1bb45a277cb3c205638b2cd5c984db1c46a412 # v4.31.7
+        uses: github/codeql-action/analyze@5d4e8d1aca955e8d8589aabd499c5cae939e33c7 # v4.31.9
        with:
          category: "/language:${{matrix.language}}"
--- a/.github/workflows/release.yml
+++ b/.github/workflows/release.yml
@@ -99,7 +99,7 @@ jobs:
          python-version: "3.11"

      - name: Set up Docker Buildx
-        uses: docker/setup-buildx-action@e468171a9de216ec08956ac3ada2f0791b6bd435 # v3.11.1
+        uses: docker/setup-buildx-action@8d2750c68a42422c14e847fe6c8ac0403b4cbd6f # v3.12.0

      - name: Log in to docker hub
        uses: docker/login-action@5e57cd118135c172c3672efd75eb46360885c0ef # v3.6.0
@@ -138,7 +138,7 @@ jobs:
      #     version: ${{ needs.init.outputs.tag }}

      - name: Upload digests
-        uses: actions/upload-artifact@330a01c490aca151604b8cf639adc76d48f6c5d4 # v5.0.0
+        uses: actions/upload-artifact@b7c566a772e6b6bfb58ed0dc250532a479d7789f # v6.0.0
        with:
          name: digests-${{ matrix.platform.arch }}
          path: /tmp/digests
@@ -171,14 +171,14 @@ jobs:
      - uses: actions/checkout@8e8c483db84b4bee98b60c0593521ed34d9990e8 # v6.0.1

      - name: Download digests
-        uses: actions/download-artifact@018cc2cf5baa6db3ef3c5f8a56943fffe632ef53 # v6.0.0
+        uses: actions/download-artifact@37930b1c2abaa49bbe596cd826c3c89aef350131 # v7.0.0
        with:
          pattern: digests-*
          path: /tmp/digests
          merge-multiple: true

      - name: Set up Docker Buildx
-        uses: docker/setup-buildx-action@e468171a9de216ec08956ac3ada2f0791b6bd435 # v3.11.1
+        uses: docker/setup-buildx-action@8d2750c68a42422c14e847fe6c8ac0403b4cbd6f # v3.12.0

      - name: Log in to docker hub
        if: matrix.registry == 'dockerhub'
@@ -221,7 +221,7 @@ jobs:
    steps:
      - name: Generate a token
        id: generate-token
-        uses: actions/create-github-app-token@7e473efe3cb98aa54f8d4bac15400b15fad77d94 # v2.2.0
+        uses: actions/create-github-app-token@29824e69f54612133e76f7eaac726eef6c875baf # v2.2.1
        with:
          app-id: ${{ secrets.ESPHOME_GITHUB_APP_ID }}
          private-key: ${{ secrets.ESPHOME_GITHUB_APP_PRIVATE_KEY }}
@@ -256,7 +256,7 @@ jobs:
    steps:
      - name: Generate a token
        id: generate-token
-        uses: actions/create-github-app-token@7e473efe3cb98aa54f8d4bac15400b15fad77d94 # v2.2.0
+        uses: actions/create-github-app-token@29824e69f54612133e76f7eaac726eef6c875baf # v2.2.1
        with:
          app-id: ${{ secrets.ESPHOME_GITHUB_APP_ID }}
          private-key: ${{ secrets.ESPHOME_GITHUB_APP_PRIVATE_KEY }}
@@ -287,7 +287,7 @@ jobs:
    steps:
      - name: Generate a token
        id: generate-token
-        uses: actions/create-github-app-token@7e473efe3cb98aa54f8d4bac15400b15fad77d94 # v2.2.0
+        uses: actions/create-github-app-token@29824e69f54612133e76f7eaac726eef6c875baf # v2.2.1
        with:
          app-id: ${{ secrets.ESPHOME_GITHUB_APP_ID }}
          private-key: ${{ secrets.ESPHOME_GITHUB_APP_PRIVATE_KEY }}
--- a/.github/workflows/sync-device-classes.yml
+++ b/.github/workflows/sync-device-classes.yml
@@ -41,7 +41,7 @@ jobs:
          python script/run-in-env.py pre-commit run --all-files

      - name: Commit changes
-        uses: peter-evans/create-pull-request@22a9089034f40e5a961c8808d113e2c98fb63676 # v7.0.11
+        uses: peter-evans/create-pull-request@98357b18bf14b5342f975ff684046ec3b2a07725 # v8.0.0
        with:
          commit-message: "Synchronise Device Classes from Home Assistant"
          committer: esphomebot <esphome@openhomefoundation.org>
--- a/.gitignore
+++ b/.gitignore
@@ -91,6 +91,10 @@ venv-*/
 # mypy
 .mypy_cache/

+# nix
+/default.nix
+/shell.nix
+
 .pioenvs
 .piolibdeps
 .pio
--- a/.pre-commit-config.yaml
+++ b/.pre-commit-config.yaml
@@ -11,7 +11,7 @@ ci:
 repos:
  - repo: https://github.com/astral-sh/ruff-pre-commit
    # Ruff version.
-    rev: v0.14.8
+    rev: v0.14.10
    hooks:
      # Run the linter.
      - id: ruff
--- a/9
+++ b/9
@@ -42,6 +42,7 @@ esphome/components/animation/* @syndlex
 esphome/components/anova/* @buxtronix
 esphome/components/apds9306/* @aodrenah
 esphome/components/api/* @esphome/core
+esphome/components/aqi/* @freekode @jasstrong @ximex
 esphome/components/as5600/* @ammmze
 esphome/components/as5600/sensor/* @ammmze
 esphome/components/as7341/* @mrgnr
@@ -90,6 +91,7 @@ esphome/components/bmp3xx_spi/* @latonita
 esphome/components/bmp581/* @kahrendt
 esphome/components/bp1658cj/* @Cossid
 esphome/components/bp5758d/* @Cossid
+esphome/components/bthome_mithermometer/* @nagyrobi
 esphome/components/button/* @esphome/core
 esphome/components/bytebuffer/* @clydebarrow
 esphome/components/camera/* @bdraco @DT-art1
@@ -133,7 +135,7 @@ esphome/components/display_menu_base/* @numo68
 esphome/components/dps310/* @kbx81
 esphome/components/ds1307/* @badbadc0ffee
 esphome/components/ds2484/* @mrk-its
-esphome/components/dsmr/* @glmnet @zuidwijk
+esphome/components/dsmr/* @glmnet @PolarGoose @zuidwijk
 esphome/components/duty_time/* @dudanov
 esphome/components/ee895/* @Stock-M
 esphome/components/ektf2232/touchscreen/* @jesserockz
@@ -215,6 +217,7 @@ esphome/components/hlk_fm22x/* @OnFreund
 esphome/components/hlw8032/* @rici4kubicek
 esphome/components/hm3301/* @freekode
 esphome/components/hmac_md5/* @dwmw2
+esphome/components/hmac_sha256/* @dwmw2
 esphome/components/homeassistant/* @esphome/core @OttoWinter
 esphome/components/homeassistant/number/* @landonr
 esphome/components/homeassistant/switch/* @Links2004
@@ -392,6 +395,7 @@ esphome/components/radon_eye_rd200/* @jeffeb3
 esphome/components/rc522/* @glmnet
 esphome/components/rc522_i2c/* @glmnet
 esphome/components/rc522_spi/* @glmnet
+esphome/components/rd03d/* @jasstrong
 esphome/components/resampler/speaker/* @kahrendt
 esphome/components/restart/* @esphome/core
 esphome/components/rf_bridge/* @jesserockz
@@ -517,6 +521,7 @@ esphome/components/tuya/switch/* @jesserockz
 esphome/components/tuya/text_sensor/* @dentra
 esphome/components/uart/* @esphome/core
 esphome/components/uart/button/* @ssieb
+esphome/components/uart/event/* @eoasmxd
 esphome/components/uart/packet_transport/* @clydebarrow
 esphome/components/udp/* @clydebarrow
 esphome/components/ufire_ec/* @pvizeli
@@ -535,6 +540,7 @@ esphome/components/version/* @esphome/core
 esphome/components/voice_assistant/* @jesserockz @kahrendt
 esphome/components/wake_on_lan/* @clydebarrow @willwill2will54
 esphome/components/watchdog/* @oarcher
+esphome/components/water_heater/* @dhoeben
 esphome/components/waveshare_epaper/* @clydebarrow
 esphome/components/web_server/ota/* @esphome/core
 esphome/components/web_server_base/* @esphome/core
@@ -570,5 +576,6 @@ esphome/components/xpt2046/touchscreen/* @nielsnl68 @numo68
 esphome/components/xxtea/* @clydebarrow
 esphome/components/zephyr/* @tomaszduda23
 esphome/components/zhlt01/* @cfeenstra1024
+esphome/components/zigbee/* @tomaszduda23
 esphome/components/zio_ultrasonic/* @kahrendt
 esphome/components/zwave_proxy/* @kbx81
--- a/2
+++ b/2
@@ -48,7 +48,7 @@ PROJECT_NAME           = ESPHome
 # could be handy for archiving the generated documentation or if some version
 # control system is used.

-PROJECT_NUMBER         = 2025.12.3
+PROJECT_NUMBER         = 2026.1.0-dev

 # Using the PROJECT_BRIEF tag one can provide an optional one line description
 # for a project that appears at the top of each page and should give viewer a
--- a/MANIFEST.in
+++ b/MANIFEST.in
@@ -1,6 +1,7 @@
 include LICENSE
 include README.md
 include requirements.txt
+recursive-include esphome *.yaml
 recursive-include esphome *.cpp *.h *.tcc *.c
 recursive-include esphome *.py.script
 recursive-include esphome LICENSE.txt
--- a/docker/Dockerfile
+++ b/docker/Dockerfile
@@ -11,6 +11,16 @@ FROM base-source-${BUILD_TYPE} AS base

 RUN git config --system --add safe.directory "*"

+# Install build tools for Python packages that require compilation
+# (e.g., ruamel.yaml.clibz used by ESP-IDF's idf-component-manager)
+RUN if command -v apk > /dev/null; then \
+        apk add --no-cache build-base; \
+    else \
+        apt-get update \
+        && apt-get install -y --no-install-recommends build-essential \
+        && rm -rf /var/lib/apt/lists/*; \
+    fi
+
 ENV PIP_DISABLE_PIP_VERSION_CHECK=1

 RUN pip install --no-cache-dir -U pip uv==0.6.14
--- a/esphome/main.py
+++ b/esphome/main.py
@@ -62,6 +62,9 @@ from esphome.util import (

 _LOGGER = logging.getLogger(__name__)

+# Maximum buffer size for serial log reading to prevent unbounded memory growth
+SERIAL_BUFFER_MAX_SIZE = 65536
+
 # Special non-component keys that appear in configs
 _NON_COMPONENT_KEYS = frozenset(
    {
@@ -431,25 +434,37 @@ def run_miniterm(config: ConfigType, port: str, args) -> int:
    while tries < 5:
        try:
            with ser:
+                buffer = b""
+                ser.timeout = 0.1  # 100ms timeout for non-blocking reads
                while True:
                    try:
-                        raw = ser.readline()
+                        # Read all available data and timestamp it
+                        chunk = ser.read(ser.in_waiting or 1)
+                        if not chunk:
+                            continue
+                        time_ = datetime.now()
+                        milliseconds = time_.microsecond // 1000
+                        time_str = f"[{time_.hour:02}:{time_.minute:02}:{time_.second:02}.{milliseconds:03}]"
+
+                        # Add to buffer and process complete lines
+                        # Limit buffer size to prevent unbounded memory growth
+                        # if device sends data without newlines
+                        buffer += chunk
+                        if len(buffer) > SERIAL_BUFFER_MAX_SIZE:
+                            buffer = buffer[-SERIAL_BUFFER_MAX_SIZE:]
+                        while b"\n" in buffer:
+                            raw_line, buffer = buffer.split(b"\n", 1)
+                            line = raw_line.replace(b"\r", b"").decode(
+                                "utf8", "backslashreplace"
+                            )
+                            safe_print(parser.parse_line(line, time_str))
+
+                            backtrace_state = platformio_api.process_stacktrace(
+                                config, line, backtrace_state=backtrace_state
+                            )
                    except serial.SerialException:
                        _LOGGER.error("Serial port closed!")
                        return 0
-                    line = (
-                        raw.replace(b"\r", b"")
-                        .replace(b"\n", b"")
-                        .decode("utf8", "backslashreplace")
-                    )
-                    time_ = datetime.now()
-                    nanoseconds = time_.microsecond // 1000
-                    time_str = f"[{time_.hour:02}:{time_.minute:02}:{time_.second:02}.{nanoseconds:03}]"
-                    safe_print(parser.parse_line(line, time_str))
-
-                    backtrace_state = platformio_api.process_stacktrace(
-                        config, line, backtrace_state=backtrace_state
-                    )
        except serial.SerialException:
            tries += 1
            time.sleep(1)
@@ -518,10 +533,49 @@ def compile_program(args: ArgsProtocol, config: ConfigType) -> int:
    rc = platformio_api.run_compile(config, CORE.verbose)
    if rc != 0:
        return rc
+
+    # Check if firmware was rebuilt and emit build_info + create manifest
+    _check_and_emit_build_info()
+
    idedata = platformio_api.get_idedata(config)
    return 0 if idedata is not None else 1


+def _check_and_emit_build_info() -> None:
+    """Check if firmware was rebuilt and emit build_info."""
+    import json
+
+    firmware_path = CORE.firmware_bin
+    build_info_json_path = CORE.relative_build_path("build_info.json")
+
+    # Check if both files exist
+    if not firmware_path.exists() or not build_info_json_path.exists():
+        return
+
+    # Check if firmware is newer than build_info (indicating a relink occurred)
+    if firmware_path.stat().st_mtime <= build_info_json_path.stat().st_mtime:
+        return
+
+    # Read build_info from JSON
+    try:
+        with open(build_info_json_path, encoding="utf-8") as f:
+            build_info = json.load(f)
+    except (OSError, json.JSONDecodeError) as e:
+        _LOGGER.debug("Failed to read build_info: %s", e)
+        return
+
+    config_hash = build_info.get("config_hash")
+    build_time_str = build_info.get("build_time_str")
+
+    if config_hash is None or build_time_str is None:
+        return
+
+    # Emit build_info with human-readable time
+    _LOGGER.info(
+        "Build Info: config_hash=0x%08x build_time_str=%s", config_hash, build_time_str
+    )
+
+
 def upload_using_esptool(
    config: ConfigType, port: str, file: str, speed: int
 ) -> str | int:
@@ -750,7 +804,13 @@ def command_compile(args: ArgsProtocol, config: ConfigType) -> int | None:
    exit_code = compile_program(args, config)
    if exit_code != 0:
        return exit_code
-    _LOGGER.info("Successfully compiled program.")
+    if CORE.is_host:
+        from esphome.platformio_api import get_idedata
+
+        program_path = str(get_idedata(config).firmware_elf_path)
+        _LOGGER.info("Successfully compiled program to path '%s'", program_path)
+    else:
+        _LOGGER.info("Successfully compiled program.")
    return 0


@@ -800,10 +860,8 @@ def command_run(args: ArgsProtocol, config: ConfigType) -> int | None:
    if CORE.is_host:
        from esphome.platformio_api import get_idedata

-        idedata = get_idedata(config)
-        if idedata is None:
-            return 1
-        program_path = idedata.raw["prog_path"]
+        program_path = str(get_idedata(config).firmware_elf_path)
+        _LOGGER.info("Running program from path '%s'", program_path)
        return run_external_process(program_path)

    # Get devices, resolving special identifiers like OTA
@@ -974,6 +1032,7 @@ def command_analyze_memory(args: ArgsProtocol, config: ConfigType) -> int:
        idedata.objdump_path,
        idedata.readelf_path,
        external_components,
+        idedata=idedata,
    )
    analyzer.analyze()

--- a/esphome/analyze_memory/init.py
+++ b/esphome/analyze_memory/init.py
@@ -22,6 +22,7 @@ from .helpers import (
    map_section_name,
    parse_symbol_line,
 )
+from .toolchain import find_tool, run_tool

 if TYPE_CHECKING:
    from esphome.platformio_api import IDEData
@@ -53,6 +54,9 @@ _NAMESPACE_STD = "std::"
 # Type alias for symbol information: (symbol_name, size, component)
 SymbolInfoType = tuple[str, int, str]

+# RAM sections - symbols in these sections consume RAM
+RAM_SECTIONS = frozenset([".data", ".bss"])
+

@dataclass
 class MemorySection:
@@ -60,7 +64,20 @@ class MemorySection:

    name: str
    symbols: list[SymbolInfoType] = field(default_factory=list)
-    total_size: int = 0
+    total_size: int = 0  # Actual section size from ELF headers
+    symbol_size: int = 0  # Sum of symbol sizes (may be less than total_size)
+
+
+@dataclass
+class SDKSymbol:
+    """Represents a symbol from an SDK library that's not in the ELF symbol table."""
+
+    name: str
+    size: int
+    library: str  # Name of the .a file (e.g., "libpp.a")
+    section: str  # ".bss" or ".data"
+    is_local: bool  # True if static/local symbol (lowercase in nm output)
+    demangled: str = ""  # Demangled name (populated after analysis)


@dataclass
@@ -118,6 +135,10 @@ class MemoryAnalyzer:
        self.objdump_path = objdump_path or "objdump"
        self.readelf_path = readelf_path or "readelf"
        self.external_components = external_components or set()
+        self._idedata = idedata
+
+        # Derive nm path from objdump path using shared toolchain utility
+        self.nm_path = find_tool("nm", self.objdump_path)

        self.sections: dict[str, MemorySection] = {}
        self.components: dict[str, ComponentMemory] = defaultdict(
@@ -128,15 +149,25 @@ class MemoryAnalyzer:
        self._esphome_core_symbols: list[
            tuple[str, str, int]
        ] = []  # Track core symbols
-        self._component_symbols: dict[str, list[tuple[str, str, int]]] = defaultdict(
+        # Track symbols for all components: (symbol_name, demangled, size, section)
+        self._component_symbols: dict[str, list[tuple[str, str, int, str]]] = (
+            defaultdict(list)
+        )
+        # Track RAM symbols separately for detailed analysis: (symbol_name, demangled, size, section)
+        self._ram_symbols: dict[str, list[tuple[str, str, int, str]]] = defaultdict(
            list
-        )  # Track symbols for all components
+        )
+        # Track ELF symbol names for SDK cross-reference
+        self._elf_symbol_names: set[str] = set()
+        # SDK symbols not in ELF (static/local symbols from closed-source libs)
+        self._sdk_symbols: list[SDKSymbol] = []

    def analyze(self) -> dict[str, ComponentMemory]:
        """Analyze the ELF file and return component memory usage."""
        self._parse_sections()
        self._parse_symbols()
        self._categorize_symbols()
+        self._analyze_sdk_libraries()
        return dict(self.components)

    def _parse_sections(self) -> None:
@@ -190,6 +221,8 @@ class MemoryAnalyzer:
                continue

            self.sections[section].symbols.append((name, size, ""))
+            self.sections[section].symbol_size += size
+            self._elf_symbol_names.add(name)
            seen_addresses.add(address)

    def _categorize_symbols(self) -> None:
@@ -233,8 +266,13 @@ class MemoryAnalyzer:
                if size > 0:
                    demangled = self._demangle_symbol(symbol_name)
                    self._component_symbols[component].append(
-                        (symbol_name, demangled, size)
+                        (symbol_name, demangled, size, section_name)
                    )
+                    # Track RAM symbols separately for detailed RAM analysis
+                    if section_name in RAM_SECTIONS:
+                        self._ram_symbols[component].append(
+                            (symbol_name, demangled, size, section_name)
+                        )

    def _identify_component(self, symbol_name: str) -> str:
        """Identify which component a symbol belongs to."""
@@ -328,6 +366,247 @@ class MemoryAnalyzer:

        return "Other Core"

+    def get_unattributed_ram(self) -> tuple[int, int, int]:
+        """Get unattributed RAM sizes (SDK/framework overhead).
+
+        Returns:
+            Tuple of (unattributed_bss, unattributed_data, total_unattributed)
+            These are bytes in RAM sections that have no corresponding symbols.
+        """
+        bss_section = self.sections.get(".bss")
+        data_section = self.sections.get(".data")
+
+        unattributed_bss = 0
+        unattributed_data = 0
+
+        if bss_section:
+            unattributed_bss = max(0, bss_section.total_size - bss_section.symbol_size)
+        if data_section:
+            unattributed_data = max(
+                0, data_section.total_size - data_section.symbol_size
+            )
+
+        return unattributed_bss, unattributed_data, unattributed_bss + unattributed_data
+
+    def _find_sdk_library_dirs(self) -> list[Path]:
+        """Find SDK library directories based on platform.
+
+        Returns:
+            List of paths to SDK library directories containing .a files.
+        """
+        sdk_dirs: list[Path] = []
+
+        if self._idedata is None:
+            return sdk_dirs
+
+        # Get the CC path to determine the framework location
+        cc_path = getattr(self._idedata, "cc_path", None)
+        if not cc_path:
+            return sdk_dirs
+
+        cc_path = Path(cc_path)
+
+        # For ESP8266 Arduino framework
+        # CC is like: ~/.platformio/packages/toolchain-xtensa/bin/xtensa-lx106-elf-gcc
+        # SDK libs are in: ~/.platformio/packages/framework-arduinoespressif8266/tools/sdk/lib/
+        if "xtensa-lx106" in str(cc_path):
+            platformio_dir = cc_path.parent.parent.parent
+            esp8266_sdk = (
+                platformio_dir
+                / "framework-arduinoespressif8266"
+                / "tools"
+                / "sdk"
+                / "lib"
+            )
+            if esp8266_sdk.exists():
+                sdk_dirs.append(esp8266_sdk)
+                # Also check for NONOSDK subdirectories (closed-source libs)
+                sdk_dirs.extend(
+                    subdir
+                    for subdir in esp8266_sdk.iterdir()
+                    if subdir.is_dir() and subdir.name.startswith("NONOSDK")
+                )
+
+        # For ESP32 IDF framework
+        # CC is like: ~/.platformio/packages/toolchain-xtensa-esp-elf/bin/xtensa-esp32-elf-gcc
+        # or: ~/.platformio/packages/toolchain-riscv32-esp/bin/riscv32-esp-elf-gcc
+        elif "xtensa-esp" in str(cc_path) or "riscv32-esp" in str(cc_path):
+            # Detect ESP32 variant from CC path or defines
+            variant = self._detect_esp32_variant()
+            if variant:
+                platformio_dir = cc_path.parent.parent.parent
+                espidf_dir = platformio_dir / "framework-espidf" / "components"
+                if espidf_dir.exists():
+                    # Find all directories named after the variant that contain .a files
+                    # This handles various ESP-IDF library layouts:
+                    # - components/*/lib/<variant>/
+                    # - components/*/<variant>/
+                    # - components/*/lib/lib/<variant>/
+                    # - components/*/*/lib_*/<variant>/
+                    sdk_dirs.extend(
+                        variant_dir
+                        for variant_dir in espidf_dir.rglob(variant)
+                        if variant_dir.is_dir() and any(variant_dir.glob("*.a"))
+                    )
+
+        return sdk_dirs
+
+    def _detect_esp32_variant(self) -> str | None:
+        """Detect ESP32 variant from idedata defines.
+
+        Returns:
+            Variant string like 'esp32', 'esp32s2', 'esp32c3', etc. or None.
+        """
+        if self._idedata is None:
+            return None
+
+        defines = getattr(self._idedata, "defines", [])
+        if not defines:
+            return None
+
+        # ESPHome always adds USE_ESP32_VARIANT_xxx defines
+        variant_prefix = "USE_ESP32_VARIANT_"
+        for define in defines:
+            if define.startswith(variant_prefix):
+                # Extract variant name and convert to lowercase
+                # USE_ESP32_VARIANT_ESP32 -> esp32
+                # USE_ESP32_VARIANT_ESP32S3 -> esp32s3
+                return define[len(variant_prefix) :].lower()
+
+        return None
+
+    def _parse_sdk_library(
+        self, lib_path: Path
+    ) -> tuple[list[tuple[str, int, str, bool]], set[str]]:
+        """Parse a single SDK library for symbols.
+
+        Args:
+            lib_path: Path to the .a library file
+
+        Returns:
+            Tuple of:
+            - List of BSS/DATA symbols: (symbol_name, size, section, is_local)
+            - Set of global BSS/DATA symbol names (for checking if RAM is linked)
+        """
+        ram_symbols: list[tuple[str, int, str, bool]] = []
+        global_ram_symbols: set[str] = set()
+
+        result = run_tool([self.nm_path, "--size-sort", str(lib_path)], timeout=10)
+        if result is None:
+            return ram_symbols, global_ram_symbols
+
+        for line in result.stdout.splitlines():
+            parts = line.split()
+            if len(parts) < 3:
+                continue
+
+            try:
+                size = int(parts[0], 16)
+                sym_type = parts[1]
+                name = parts[2]
+
+                # Only collect BSS (b/B) and DATA (d/D) for RAM analysis
+                if sym_type in ("b", "B"):
+                    section = ".bss"
+                    is_local = sym_type == "b"
+                    ram_symbols.append((name, size, section, is_local))
+                    # Track global RAM symbols (B/D) for linking check
+                    if sym_type == "B":
+                        global_ram_symbols.add(name)
+                elif sym_type in ("d", "D"):
+                    section = ".data"
+                    is_local = sym_type == "d"
+                    ram_symbols.append((name, size, section, is_local))
+                    if sym_type == "D":
+                        global_ram_symbols.add(name)
+            except (ValueError, IndexError):
+                continue
+
+        return ram_symbols, global_ram_symbols
+
+    def _analyze_sdk_libraries(self) -> None:
+        """Analyze SDK libraries to find symbols not in the ELF.
+
+        This finds static/local symbols from closed-source SDK libraries
+        that consume RAM but don't appear in the final ELF symbol table.
+        Only includes symbols from libraries that have RAM actually linked
+        (at least one global BSS/DATA symbol in the ELF).
+        """
+        sdk_dirs = self._find_sdk_library_dirs()
+        if not sdk_dirs:
+            _LOGGER.debug("No SDK library directories found")
+            return
+
+        _LOGGER.debug("Analyzing SDK libraries in %d directories", len(sdk_dirs))
+
+        # Track seen symbols to avoid duplicates from multiple SDK versions
+        seen_symbols: set[str] = set()
+
+        for sdk_dir in sdk_dirs:
+            for lib_path in sorted(sdk_dir.glob("*.a")):
+                lib_name = lib_path.name
+                ram_symbols, global_ram_symbols = self._parse_sdk_library(lib_path)
+
+                # Check if this library's RAM is actually linked by seeing if any
+                # of its global BSS/DATA symbols appear in the ELF
+                if not global_ram_symbols & self._elf_symbol_names:
+                    # No RAM from this library is in the ELF - skip it
+                    continue
+
+                for name, size, section, is_local in ram_symbols:
+                    # Skip if already in ELF or already seen from another lib
+                    if name in self._elf_symbol_names or name in seen_symbols:
+                        continue
+
+                    # Only track symbols with non-zero size
+                    if size > 0:
+                        self._sdk_symbols.append(
+                            SDKSymbol(
+                                name=name,
+                                size=size,
+                                library=lib_name,
+                                section=section,
+                                is_local=is_local,
+                            )
+                        )
+                        seen_symbols.add(name)
+
+        # Demangle SDK symbols for better readability
+        if self._sdk_symbols:
+            sdk_names = [sym.name for sym in self._sdk_symbols]
+            demangled_map = batch_demangle(sdk_names, objdump_path=self.objdump_path)
+            for sym in self._sdk_symbols:
+                sym.demangled = demangled_map.get(sym.name, sym.name)
+
+        # Sort by size descending for reporting
+        self._sdk_symbols.sort(key=lambda s: s.size, reverse=True)
+
+        total_sdk_ram = sum(s.size for s in self._sdk_symbols)
+        _LOGGER.debug(
+            "Found %d SDK symbols not in ELF, totaling %d bytes",
+            len(self._sdk_symbols),
+            total_sdk_ram,
+        )
+
+    def get_sdk_ram_symbols(self) -> list[SDKSymbol]:
+        """Get SDK symbols that consume RAM but aren't in the ELF symbol table.
+
+        Returns:
+            List of SDKSymbol objects sorted by size descending.
+        """
+        return self._sdk_symbols
+
+    def get_sdk_ram_by_library(self) -> dict[str, list[SDKSymbol]]:
+        """Get SDK RAM symbols grouped by library.
+
+        Returns:
+            Dictionary mapping library name to list of symbols.
+        """
+        by_lib: dict[str, list[SDKSymbol]] = defaultdict(list)
+        for sym in self._sdk_symbols:
+            by_lib[sym.library].append(sym)
+        return dict(by_lib)
+

 if __name__ == "__main__":
    from .cli import main
--- a/esphome/analyze_memory/cli.py
+++ b/esphome/analyze_memory/cli.py
@@ -1,16 +1,24 @@
 """CLI interface for memory analysis with report generation."""

+from __future__ import annotations
+
 from collections import defaultdict
+from collections.abc import Callable
 import sys
+from typing import TYPE_CHECKING

 from . import (
    _COMPONENT_API,
    _COMPONENT_CORE,
    _COMPONENT_PREFIX_ESPHOME,
    _COMPONENT_PREFIX_EXTERNAL,
+    RAM_SECTIONS,
    MemoryAnalyzer,
 )

+if TYPE_CHECKING:
+    from . import ComponentMemory
+

 class MemoryAnalyzerCLI(MemoryAnalyzer):
    """Memory analyzer with CLI-specific report generation."""
@@ -19,6 +27,8 @@ class MemoryAnalyzerCLI(MemoryAnalyzer):
    SYMBOL_SIZE_THRESHOLD: int = (
        100  # Show symbols larger than this in detailed analysis
    )
+    # Lower threshold for RAM symbols (RAM is more constrained)
+    RAM_SYMBOL_SIZE_THRESHOLD: int = 24

    # Column width constants
    COL_COMPONENT: int = 29
@@ -83,6 +93,60 @@ class MemoryAnalyzerCLI(MemoryAnalyzer):
        COL_CORE_PERCENT,
    )

+    def _add_section_header(self, lines: list[str], title: str) -> None:
+        """Add a section header with title centered between separator lines."""
+        lines.append("")
+        lines.append("=" * self.TABLE_WIDTH)
+        lines.append(title.center(self.TABLE_WIDTH))
+        lines.append("=" * self.TABLE_WIDTH)
+        lines.append("")
+
+    def _add_top_consumers(
+        self,
+        lines: list[str],
+        title: str,
+        components: list[tuple[str, ComponentMemory]],
+        get_size: Callable[[ComponentMemory], int],
+        total: int,
+        memory_type: str,
+        limit: int = 25,
+    ) -> None:
+        """Add a formatted list of top memory consumers to the report.
+
+        Args:
+            lines: List of report lines to append the output to.
+            title: Section title to print before the list.
+            components: Sequence of (name, ComponentMemory) tuples to analyze.
+            get_size: Callable that takes a ComponentMemory and returns the
+                size in bytes to use for ranking and display.
+            total: Total size in bytes for computing percentage usage.
+            memory_type: Label for the memory region (e.g., "flash" or "RAM").
+            limit: Maximum number of components to include in the list.
+        """
+        lines.append("")
+        lines.append(f"{title}:")
+        for i, (name, mem) in enumerate(components[:limit]):
+            size = get_size(mem)
+            if size > 0:
+                percentage = (size / total * 100) if total > 0 else 0
+                lines.append(
+                    f"{i + 1}. {name} ({size:,} B) - {percentage:.1f}% of analyzed {memory_type}"
+                )
+
+    def _format_symbol_with_section(
+        self, demangled: str, size: int, section: str | None = None
+    ) -> str:
+        """Format a symbol entry, optionally adding a RAM section label.
+
+        If section is one of the RAM sections (.data or .bss), a label like
+        " [data]" or " [bss]" is appended. For non-RAM sections or when
+        section is None, no section label is added.
+        """
+        section_label = ""
+        if section in RAM_SECTIONS:
+            section_label = f" [{section[1:]}]"  # .data -> [data], .bss -> [bss]
+        return f"{demangled} ({size:,} B){section_label}"
+
    def generate_report(self, detailed: bool = False) -> str:
        """Generate a formatted memory report."""
        components = sorted(
@@ -123,43 +187,70 @@ class MemoryAnalyzerCLI(MemoryAnalyzer):
            f"{total_flash:>{self.COL_TOTAL_FLASH - 2},} B | {total_ram:>{self.COL_TOTAL_RAM - 2},} B"
        )

-        # Top consumers
-        lines.append("")
-        lines.append("Top Flash Consumers:")
-        for i, (name, mem) in enumerate(components[:25]):
-            if mem.flash_total > 0:
-                percentage = (
-                    (mem.flash_total / total_flash * 100) if total_flash > 0 else 0
-                )
-                lines.append(
-                    f"{i + 1}. {name} ({mem.flash_total:,} B) - {percentage:.1f}% of analyzed flash"
-                )
-
-        lines.append("")
-        lines.append("Top RAM Consumers:")
-        ram_components = sorted(components, key=lambda x: x[1].ram_total, reverse=True)
-        for i, (name, mem) in enumerate(ram_components[:25]):
-            if mem.ram_total > 0:
-                percentage = (mem.ram_total / total_ram * 100) if total_ram > 0 else 0
-                lines.append(
-                    f"{i + 1}. {name} ({mem.ram_total:,} B) - {percentage:.1f}% of analyzed RAM"
-                )
-
-        lines.append("")
-        lines.append(
-            "Note: This analysis covers symbols in the ELF file. Some runtime allocations may not be included."
+        # Show unattributed RAM (SDK/framework overhead)
+        unattributed_bss, unattributed_data, unattributed_total = (
+            self.get_unattributed_ram()
+        )
+        if unattributed_total > 0:
+            lines.append("")
+            lines.append(
+                f"Unattributed RAM: {unattributed_total:,} B (SDK/framework overhead)"
+            )
+            if unattributed_bss > 0 and unattributed_data > 0:
+                lines.append(
+                    f"  .bss: {unattributed_bss:,} B | .data: {unattributed_data:,} B"
+                )
+
+            # Show SDK symbol breakdown if available
+            sdk_by_lib = self.get_sdk_ram_by_library()
+            if sdk_by_lib:
+                lines.append("")
+                lines.append("SDK library breakdown (static symbols not in ELF):")
+                # Sort libraries by total size
+                lib_totals = [
+                    (lib, sum(s.size for s in syms), syms)
+                    for lib, syms in sdk_by_lib.items()
+                ]
+                lib_totals.sort(key=lambda x: x[1], reverse=True)
+
+                for lib_name, lib_total, syms in lib_totals:
+                    if lib_total == 0:
+                        continue
+                    lines.append(f"  {lib_name}: {lib_total:,} B")
+                    # Show top symbols from this library
+                    for sym in sorted(syms, key=lambda s: s.size, reverse=True)[:3]:
+                        section_label = sym.section.lstrip(".")
+                        # Use demangled name (falls back to original if not demangled)
+                        display_name = sym.demangled or sym.name
+                        if len(display_name) > 50:
+                            display_name = f"{display_name[:47]}..."
+                        lines.append(
+                            f"    {sym.size:>6,} B [{section_label}] {display_name}"
+                        )
+
+        # Top consumers
+        self._add_top_consumers(
+            lines,
+            "Top Flash Consumers",
+            components,
+            lambda m: m.flash_total,
+            total_flash,
+            "flash",
+        )
+
+        ram_components = sorted(components, key=lambda x: x[1].ram_total, reverse=True)
+        self._add_top_consumers(
+            lines,
+            "Top RAM Consumers",
+            ram_components,
+            lambda m: m.ram_total,
+            total_ram,
+            "RAM",
        )
-        lines.append("=" * self.TABLE_WIDTH)

        # Add ESPHome core detailed analysis if there are core symbols
        if self._esphome_core_symbols:
-            lines.append("")
-            lines.append("=" * self.TABLE_WIDTH)
-            lines.append(
-                f"{_COMPONENT_CORE} Detailed Analysis".center(self.TABLE_WIDTH)
-            )
-            lines.append("=" * self.TABLE_WIDTH)
-            lines.append("")
+            self._add_section_header(lines, f"{_COMPONENT_CORE} Detailed Analysis")

            # Group core symbols by subcategory
            core_subcategories: dict[str, list[tuple[str, str, int]]] = defaultdict(
@@ -211,7 +302,11 @@ class MemoryAnalyzerCLI(MemoryAnalyzer):
                f"{_COMPONENT_CORE} Symbols > {self.SYMBOL_SIZE_THRESHOLD} B ({len(large_core_symbols)} symbols):"
            )
            for i, (symbol, demangled, size) in enumerate(large_core_symbols):
-                lines.append(f"{i + 1}. {demangled} ({size:,} B)")
+                # Core symbols only track (symbol, demangled, size) without section info,
+                # so we don't show section labels here
+                lines.append(
+                    f"{i + 1}. {self._format_symbol_with_section(demangled, size)}"
+                )

            lines.append("=" * self.TABLE_WIDTH)

@@ -267,11 +362,7 @@ class MemoryAnalyzerCLI(MemoryAnalyzer):
            for comp_name, comp_mem in components_to_analyze:
                if not (comp_symbols := self._component_symbols.get(comp_name, [])):
                    continue
-                lines.append("")
-                lines.append("=" * self.TABLE_WIDTH)
-                lines.append(f"{comp_name} Detailed Analysis".center(self.TABLE_WIDTH))
-                lines.append("=" * self.TABLE_WIDTH)
-                lines.append("")
+                self._add_section_header(lines, f"{comp_name} Detailed Analysis")

                # Sort symbols by size
                sorted_symbols = sorted(comp_symbols, key=lambda x: x[2], reverse=True)
@@ -282,19 +373,69 @@ class MemoryAnalyzerCLI(MemoryAnalyzer):

                # Show all symbols above threshold for better visibility
                large_symbols = [
-                    (sym, dem, size)
-                    for sym, dem, size in sorted_symbols
+                    (sym, dem, size, sec)
+                    for sym, dem, size, sec in sorted_symbols
                    if size > self.SYMBOL_SIZE_THRESHOLD
                ]

                lines.append(
                    f"{comp_name} Symbols > {self.SYMBOL_SIZE_THRESHOLD} B ({len(large_symbols)} symbols):"
                )
-                for i, (symbol, demangled, size) in enumerate(large_symbols):
-                    lines.append(f"{i + 1}. {demangled} ({size:,} B)")
+                for i, (symbol, demangled, size, section) in enumerate(large_symbols):
+                    lines.append(
+                        f"{i + 1}. {self._format_symbol_with_section(demangled, size, section)}"
+                    )

                lines.append("=" * self.TABLE_WIDTH)

+        # Detailed RAM analysis by component (at end, before RAM strings analysis)
+        self._add_section_header(lines, "RAM Symbol Analysis by Component")
+
+        # Show top 15 RAM consumers with their large symbols
+        for name, mem in ram_components[:15]:
+            if mem.ram_total == 0:
+                continue
+            ram_syms = self._ram_symbols.get(name, [])
+            if not ram_syms:
+                continue
+
+            # Sort by size descending
+            sorted_ram_syms = sorted(ram_syms, key=lambda x: x[2], reverse=True)
+            large_ram_syms = [
+                s for s in sorted_ram_syms if s[2] > self.RAM_SYMBOL_SIZE_THRESHOLD
+            ]
+
+            lines.append(f"{name} ({mem.ram_total:,} B total RAM):")
+
+            # Show breakdown by section type
+            data_size = sum(s[2] for s in ram_syms if s[3] == ".data")
+            bss_size = sum(s[2] for s in ram_syms if s[3] == ".bss")
+            lines.append(f"  .data (initialized): {data_size:,} B")
+            lines.append(f"  .bss (uninitialized): {bss_size:,} B")
+
+            if large_ram_syms:
+                lines.append(
+                    f"  Symbols > {self.RAM_SYMBOL_SIZE_THRESHOLD} B ({len(large_ram_syms)}):"
+                )
+                for symbol, demangled, size, section in large_ram_syms[:10]:
+                    # Format section label consistently by stripping leading dot
+                    section_label = section.lstrip(".") if section else ""
+                    # Add ellipsis if name is truncated
+                    demangled_display = (
+                        f"{demangled[:70]}..." if len(demangled) > 70 else demangled
+                    )
+                    lines.append(
+                        f"    {size:>6,} B [{section_label}] {demangled_display}"
+                    )
+                if len(large_ram_syms) > 10:
+                    lines.append(f"    ... and {len(large_ram_syms) - 10} more")
+            lines.append("")
+
+        lines.append(
+            "Note: This analysis covers symbols in the ELF file. Some runtime allocations may not be included."
+        )
+        lines.append("=" * self.TABLE_WIDTH)
+
        return "\n".join(lines)

    def dump_uncategorized_symbols(self, output_file: str | None = None) -> None:
--- a/esphome/analyze_memory/const.py
+++ b/esphome/analyze_memory/const.py
@@ -7,11 +7,13 @@ ESPHOME_COMPONENT_PATTERN = re.compile(r"esphome::([a-zA-Z0-9_]+)::")

 # Section mapping for ELF file sections
 # Maps standard section names to their various platform-specific variants
+# Note: Order matters! More specific patterns (.bss) must come before general ones (.dram)
+# because ESP-IDF uses names like ".dram0.bss" which would match ".dram" otherwise
 SECTION_MAPPING = {
    ".text": frozenset([".text", ".iram"]),
    ".rodata": frozenset([".rodata"]),
+    ".bss": frozenset([".bss"]),  # Must be before .data to catch ".dram0.bss"
    ".data": frozenset([".data", ".dram"]),
-    ".bss": frozenset([".bss"]),
 }

 # Section to ComponentMemory attribute mapping
@@ -88,6 +90,77 @@ SYMBOL_PATTERNS = {
        "sys_mbox_new",
        "sys_arch_mbox_tryfetch",
    ],
+    # LibreTiny/Beken BK7231 radio calibration
+    "bk_radio_cal": [
+        "bk7011_",
+        "calibration_main",
+        "gcali_",
+        "rwnx_cal",
+    ],
+    # LibreTiny/Beken WiFi MAC layer
+    "bk_wifi_mac": [
+        "rxu_",  # RX upper layer
+        "txu_",  # TX upper layer
+        "txl_",  # TX lower layer
+        "rxl_",  # RX lower layer
+        "scanu_",  # Scan unit
+        "mm_hw_",  # MAC management hardware
+        "mm_bcn",  # MAC management beacon
+        "mm_tim",  # MAC management TIM
+        "mm_check",  # MAC management checks
+        "sm_connect",  # Station management
+        "me_beacon",  # Management entity beacon
+        "me_build",  # Management entity build
+        "hapd_",  # Host AP daemon
+        "chan_pre_",  # Channel management
+        "handle_probe_",  # Probe handling
+    ],
+    # LibreTiny/Beken system control
+    "bk_system": [
+        "sctrl_",  # System control
+        "icu_ctrl",  # Interrupt control unit
+        "gdma_ctrl",  # DMA control
+        "mpb_ctrl",  # MPB control
+        "uf2_",  # UF2 OTA
+        "bkreg_",  # Beken registers
+    ],
+    # LibreTiny/Beken BLE stack
+    "bk_ble": [
+        "gapc_",  # GAP client
+        "gattc_",  # GATT client
+        "attc_",  # ATT client
+        "attmdb_",  # ATT database
+        "atts_",  # ATT server
+        "l2cc_",  # L2CAP
+        "prf_env",  # Profile environment
+    ],
+    # LibreTiny/Beken scheduler
+    "bk_scheduler": [
+        "sch_plan_",  # Scheduler plan
+        "sch_prog_",  # Scheduler program
+        "sch_arb_",  # Scheduler arbiter
+    ],
+    # LibreTiny/Beken DMA descriptors
+    "bk_dma": [
+        "rx_payload_desc",
+        "rx_dma_hdrdesc",
+        "tx_hw_desc",
+        "host_event_data",
+        "host_cmd_data",
+    ],
+    # ARM EABI compiler runtime (LibreTiny uses ARM Cortex-M)
+    "arm_runtime": [
+        "__aeabi_",
+        "__adddf3",
+        "__subdf3",
+        "__muldf3",
+        "__divdf3",
+        "__addsf3",
+        "__subsf3",
+        "__mulsf3",
+        "__divsf3",
+        "__gnu_unwind",
+    ],
    "xtensa": ["xt_", "_xt_", "xPortEnterCriticalTimeout"],
    "heap": ["heap_", "multi_heap"],
    "spi_flash": ["spi_flash"],
@@ -782,7 +855,22 @@ SYMBOL_PATTERNS = {
    "math_internal": ["__mdiff", "__lshift", "__mprec_tens", "quorem"],
    "character_class": ["__chclass"],
    "camellia": ["camellia_", "camellia_feistel"],
-    "crypto_tables": ["FSb", "FSb2", "FSb3", "FSb4"],
+    "crypto_tables": [
+        "FSb",
+        "FSb2",
+        "FSb3",
+        "FSb4",
+        "Te0",  # AES encryption table
+        "Td0",  # AES decryption table
+        "crc32_table",  # CRC32 lookup table
+        "crc_tab",  # CRC lookup table
+    ],
+    "crypto_hash": [
+        "SHA1Transform",  # SHA1 hash function
+        "MD5Transform",  # MD5 hash function
+        "SHA256",
+        "SHA512",
+    ],
    "event_buffer": ["g_eb_list_desc", "eb_space"],
    "base_node": ["base_node_", "base_node_add_handler"],
    "file_descriptor": ["s_fd_table"],
--- a/esphome/analyze_memory/toolchain.py
+++ b/esphome/analyze_memory/toolchain.py
@@ -5,6 +5,10 @@ from __future__ import annotations
 import logging
 from pathlib import Path
 import subprocess
+from typing import TYPE_CHECKING
+
+if TYPE_CHECKING:
+    from collections.abc import Sequence

 _LOGGER = logging.getLogger(__name__)

@@ -55,3 +59,35 @@ def find_tool(

    _LOGGER.warning("Could not find %s tool", tool_name)
    return None
+
+
+def run_tool(
+    cmd: Sequence[str],
+    timeout: int = 30,
+) -> subprocess.CompletedProcess[str] | None:
+    """Run a toolchain command and return the result.
+
+    Args:
+        cmd: Command and arguments to run
+        timeout: Timeout in seconds
+
+    Returns:
+        CompletedProcess on success, None on failure
+    """
+    try:
+        return subprocess.run(
+            cmd,
+            capture_output=True,
+            text=True,
+            timeout=timeout,
+            check=False,
+        )
+    except subprocess.TimeoutExpired:
+        _LOGGER.warning("Command timed out: %s", " ".join(cmd))
+        return None
+    except FileNotFoundError:
+        _LOGGER.warning("Command not found: %s", cmd[0])
+        return None
+    except OSError as e:
+        _LOGGER.warning("Failed to run command %s: %s", cmd[0], e)
+        return None
--- a/esphome/components/a01nyub/a01nyub.cpp
+++ b/esphome/components/a01nyub/a01nyub.cpp
@@ -30,7 +30,9 @@ void A01nyubComponent::check_buffer_() {
      ESP_LOGV(TAG, "Distance from sensor: %f mm, %f m", distance, meters);
      this->publish_state(meters);
    } else {
-      ESP_LOGW(TAG, "Invalid data read from sensor: %s", format_hex_pretty(this->buffer_).c_str());
+      char hex_buf[format_hex_pretty_size(4)];
+      ESP_LOGW(TAG, "Invalid data read from sensor: %s",
+               format_hex_pretty_to(hex_buf, this->buffer_.data(), this->buffer_.size()));
    }
  } else {
    ESP_LOGW(TAG, "checksum failed: %02x != %02x", checksum, this->buffer_[3]);
--- a/esphome/components/a02yyuw/a02yyuw.cpp
+++ b/esphome/components/a02yyuw/a02yyuw.cpp
@@ -29,7 +29,9 @@ void A02yyuwComponent::check_buffer_() {
      ESP_LOGV(TAG, "Distance from sensor: %f mm", distance);
      this->publish_state(distance);
    } else {
-      ESP_LOGW(TAG, "Invalid data read from sensor: %s", format_hex_pretty(this->buffer_).c_str());
+      char hex_buf[format_hex_pretty_size(4)];
+      ESP_LOGW(TAG, "Invalid data read from sensor: %s",
+               format_hex_pretty_to(hex_buf, this->buffer_.data(), this->buffer_.size()));
    }
  } else {
    ESP_LOGW(TAG, "checksum failed: %02x != %02x", checksum, this->buffer_[3]);
--- a/esphome/components/absolute_humidity/absolute_humidity.cpp
+++ b/esphome/components/absolute_humidity/absolute_humidity.cpp
@@ -90,13 +90,16 @@ void AbsoluteHumidityComponent::loop() {
      this->status_set_error(LOG_STR("Invalid saturation vapor pressure equation selection!"));
      return;
  }
-  ESP_LOGD(TAG, "Saturation vapor pressure %f kPa", es);

  // Calculate absolute humidity
  const float absolute_humidity = vapor_density(es, hr, temperature_k);

+  ESP_LOGD(TAG,
+           "Saturation vapor pressure %f kPa\n"
+           "Publishing absolute humidity %f g/m³",
+           es, absolute_humidity);
+
  // Publish absolute humidity
-  ESP_LOGD(TAG, "Publishing absolute humidity %f g/m³", absolute_humidity);
  this->status_clear_warning();
  this->publish_state(absolute_humidity);
 }
--- a/esphome/components/ac_dimmer/ac_dimmer.cpp
+++ b/esphome/components/ac_dimmer/ac_dimmer.cpp
@@ -211,13 +211,13 @@ void AcDimmer::write_state(float state) {
  this->store_.value = new_value;
 }
 void AcDimmer::dump_config() {
-  ESP_LOGCONFIG(TAG, "AcDimmer:");
-  LOG_PIN("  Output Pin: ", this->gate_pin_);
-  LOG_PIN("  Zero-Cross Pin: ", this->zero_cross_pin_);
  ESP_LOGCONFIG(TAG,
+                "AcDimmer:\n"
                "   Min Power: %.1f%%\n"
                "   Init with half cycle: %s",
                this->store_.min_power / 10.0f, YESNO(this->init_with_half_cycle_));
+  LOG_PIN("  Output Pin: ", this->gate_pin_);
+  LOG_PIN("  Zero-Cross Pin: ", this->zero_cross_pin_);
  if (method_ == DIM_METHOD_LEADING_PULSE) {
    ESP_LOGCONFIG(TAG, "   Method: leading pulse");
  } else if (method_ == DIM_METHOD_LEADING) {
--- a/esphome/components/ac_dimmer/output.py
+++ b/esphome/components/ac_dimmer/output.py
@@ -3,6 +3,7 @@ import esphome.codegen as cg
 from esphome.components import output
 import esphome.config_validation as cv
 from esphome.const import CONF_ID, CONF_METHOD, CONF_MIN_POWER
+from esphome.core import CORE

 CODEOWNERS = ["@glmnet"]

@@ -36,6 +37,12 @@ CONFIG_SCHEMA = cv.All(


 async def to_code(config):
+    if CORE.is_esp8266:
+        # ac_dimmer uses setTimer1Callback which requires the waveform generator
+        from esphome.components.esp8266.const import require_waveform
+
+        require_waveform()
+
    var = cg.new_Pvariable(config[CONF_ID])
    await cg.register_component(var, config)

--- a/esphome/components/adc/adc_sensor_esp32.cpp
+++ b/esphome/components/adc/adc_sensor_esp32.cpp
@@ -121,23 +121,21 @@ void ADCSensor::setup() {
 void ADCSensor::dump_config() {
  LOG_SENSOR("", "ADC Sensor", this);
  LOG_PIN("  Pin: ", this->pin_);
-  ESP_LOGCONFIG(TAG,
-                "  Channel:       %d\n"
-                "  Unit:          %s\n"
-                "  Attenuation:   %s\n"
-                "  Samples:       %i\n"
-                "  Sampling mode: %s",
-                this->channel_, LOG_STR_ARG(adc_unit_to_str(this->adc_unit_)),
-                this->autorange_ ? "Auto" : LOG_STR_ARG(attenuation_to_str(this->attenuation_)), this->sample_count_,
-                LOG_STR_ARG(sampling_mode_to_str(this->sampling_mode_)));
-
  ESP_LOGCONFIG(
      TAG,
+      "  Channel:       %d\n"
+      "  Unit:          %s\n"
+      "  Attenuation:   %s\n"
+      "  Samples:       %i\n"
+      "  Sampling mode: %s\n"
      "  Setup Status:\n"
      "    Handle Init:  %s\n"
      "    Config:       %s\n"
      "    Calibration:  %s\n"
      "    Overall Init: %s",
+      this->channel_, LOG_STR_ARG(adc_unit_to_str(this->adc_unit_)),
+      this->autorange_ ? "Auto" : LOG_STR_ARG(attenuation_to_str(this->attenuation_)), this->sample_count_,
+      LOG_STR_ARG(sampling_mode_to_str(this->sampling_mode_)),
      this->setup_flags_.handle_init_complete ? "OK" : "FAILED", this->setup_flags_.config_complete ? "OK" : "FAILED",
      this->setup_flags_.calibration_complete ? "OK" : "FAILED", this->setup_flags_.init_complete ? "OK" : "FAILED");

--- a/esphome/components/addressable_light/addressable_light_display.h
+++ b/esphome/components/addressable_light/addressable_light_display.h
@@ -25,11 +25,13 @@ class AddressableLightDisplay : public display::DisplayBuffer {
      if (enabled_ && !enabled) {  // enabled -> disabled
        // - Tell the parent light to refresh, effectively wiping the display. Also
        //   restores the previous effect (if any).
-        light_state_->make_call().set_effect(this->last_effect_).perform();
+        if (this->last_effect_index_.has_value()) {
+          light_state_->make_call().set_effect(*this->last_effect_index_).perform();
+        }

      } else if (!enabled_ && enabled) {  // disabled -> enabled
-        // - Save the current effect.
-        this->last_effect_ = light_state_->get_effect_name();
+        // - Save the current effect index.
+        this->last_effect_index_ = light_state_->get_current_effect_index();
        // - Disable any current effect.
        light_state_->make_call().set_effect(0).perform();
      }
@@ -56,7 +58,7 @@ class AddressableLightDisplay : public display::DisplayBuffer {
  int32_t width_;
  int32_t height_;
  std::vector<Color> addressable_light_buffer_;
-  optional<std::string> last_effect_;
+  optional<uint32_t> last_effect_index_;
  optional<std::function<int(int, int)>> pixel_mapper_f_;
 };
 }  // namespace addressable_light
--- a/esphome/components/ade7880/ade7880.cpp
+++ b/esphome/components/ade7880/ade7880.cpp
@@ -162,11 +162,13 @@ void ADE7880::update() {
 }

 void ADE7880::dump_config() {
-  ESP_LOGCONFIG(TAG, "ADE7880:");
+  ESP_LOGCONFIG(TAG,
+                "ADE7880:\n"
+                "  Frequency: %.0f Hz",
+                this->frequency_);
  LOG_PIN("  IRQ0  Pin: ", this->irq0_pin_);
  LOG_PIN("  IRQ1  Pin: ", this->irq1_pin_);
  LOG_PIN("  RESET Pin: ", this->reset_pin_);
-  ESP_LOGCONFIG(TAG, "  Frequency: %.0f Hz", this->frequency_);

  if (this->channel_a_ != nullptr) {
    ESP_LOGCONFIG(TAG, "  Phase A:");
--- a/esphome/components/ads1115/sensor/ads1115_sensor.cpp
+++ b/esphome/components/ads1115/sensor/ads1115_sensor.cpp
@@ -21,10 +21,12 @@ void ADS1115Sensor::update() {

 void ADS1115Sensor::dump_config() {
  LOG_SENSOR("  ", "ADS1115 Sensor", this);
-  ESP_LOGCONFIG(TAG, "    Multiplexer: %u", this->multiplexer_);
-  ESP_LOGCONFIG(TAG, "    Gain: %u", this->gain_);
-  ESP_LOGCONFIG(TAG, "    Resolution: %u", this->resolution_);
-  ESP_LOGCONFIG(TAG, "    Sample rate: %u", this->samplerate_);
+  ESP_LOGCONFIG(TAG,
+                "    Multiplexer: %u\n"
+                "    Gain: %u\n"
+                "    Resolution: %u\n"
+                "    Sample rate: %u",
+                this->multiplexer_, this->gain_, this->resolution_, this->samplerate_);
 }

 }  // namespace ads1115
--- a/esphome/components/ads1118/sensor/ads1118_sensor.cpp
+++ b/esphome/components/ads1118/sensor/ads1118_sensor.cpp
@@ -9,8 +9,10 @@ static const char *const TAG = "ads1118.sensor";

 void ADS1118Sensor::dump_config() {
  LOG_SENSOR("  ", "ADS1118 Sensor", this);
-  ESP_LOGCONFIG(TAG, "    Multiplexer: %u", this->multiplexer_);
-  ESP_LOGCONFIG(TAG, "    Gain: %u", this->gain_);
+  ESP_LOGCONFIG(TAG,
+                "    Multiplexer: %u\n"
+                "    Gain: %u",
+                this->multiplexer_, this->gain_);
 }

 float ADS1118Sensor::sample() {
--- a/esphome/components/airthings_ble/airthings_listener.cpp
+++ b/esphome/components/airthings_ble/airthings_listener.cpp
@@ -20,7 +20,8 @@ bool AirthingsListener::parse_device(const esp32_ble_tracker::ESPBTDevice &devic
      sn |= ((uint32_t) it.data[2] << 16);
      sn |= ((uint32_t) it.data[3] << 24);

-      ESP_LOGD(TAG, "Found AirThings device Serial:%" PRIu32 " (MAC: %s)", sn, device.address_str().c_str());
+      char addr_buf[MAC_ADDRESS_PRETTY_BUFFER_SIZE];
+      ESP_LOGD(TAG, "Found AirThings device Serial:%" PRIu32 " (MAC: %s)", sn, device.address_str_to(addr_buf));
      return true;
    }
  }
--- a/esphome/components/airthings_wave_base/airthings_wave_base.cpp
+++ b/esphome/components/airthings_wave_base/airthings_wave_base.cpp
@@ -1,4 +1,5 @@
 #include "airthings_wave_base.h"
+#include "esphome/components/esp32_ble/ble_uuid.h"

 // All information related to reading battery information came from the sensors.airthings_wave
 // project by Sverre Hamre (https://github.com/sverrham/sensor.airthings_wave)
@@ -93,8 +94,10 @@ void AirthingsWaveBase::update() {
 bool AirthingsWaveBase::request_read_values_() {
  auto *chr = this->parent()->get_characteristic(this->service_uuid_, this->sensors_data_characteristic_uuid_);
  if (chr == nullptr) {
-    ESP_LOGW(TAG, "No sensor characteristic found at service %s char %s", this->service_uuid_.to_string().c_str(),
-             this->sensors_data_characteristic_uuid_.to_string().c_str());
+    char service_buf[esp32_ble::UUID_STR_LEN];
+    char char_buf[esp32_ble::UUID_STR_LEN];
+    ESP_LOGW(TAG, "No sensor characteristic found at service %s char %s", this->service_uuid_.to_str(service_buf),
+             this->sensors_data_characteristic_uuid_.to_str(char_buf));
    return false;
  }

@@ -117,17 +120,20 @@ bool AirthingsWaveBase::request_battery_() {

  auto *chr = this->parent()->get_characteristic(this->service_uuid_, this->access_control_point_characteristic_uuid_);
  if (chr == nullptr) {
+    char service_buf[esp32_ble::UUID_STR_LEN];
+    char char_buf[esp32_ble::UUID_STR_LEN];
    ESP_LOGW(TAG, "No access control point characteristic found at service %s char %s",
-             this->service_uuid_.to_string().c_str(),
-             this->access_control_point_characteristic_uuid_.to_string().c_str());
+             this->service_uuid_.to_str(service_buf), this->access_control_point_characteristic_uuid_.to_str(char_buf));
    return false;
  }

  auto *descr = this->parent()->get_descriptor(this->service_uuid_, this->access_control_point_characteristic_uuid_,
                                               CLIENT_CHARACTERISTIC_CONFIGURATION_DESCRIPTOR_UUID);
  if (descr == nullptr) {
-    ESP_LOGW(TAG, "No CCC descriptor found at service %s char %s", this->service_uuid_.to_string().c_str(),
-             this->access_control_point_characteristic_uuid_.to_string().c_str());
+    char service_buf[esp32_ble::UUID_STR_LEN];
+    char char_buf[esp32_ble::UUID_STR_LEN];
+    ESP_LOGW(TAG, "No CCC descriptor found at service %s char %s", this->service_uuid_.to_str(service_buf),
+             this->access_control_point_characteristic_uuid_.to_str(char_buf));
    return false;
  }

--- a/esphome/components/alarm_control_panel/alarm_control_panel.cpp
+++ b/esphome/components/alarm_control_panel/alarm_control_panel.cpp
@@ -8,8 +8,7 @@
 #include "esphome/core/helpers.h"
 #include "esphome/core/log.h"

-namespace esphome {
-namespace alarm_control_panel {
+namespace esphome::alarm_control_panel {

 static const char *const TAG = "alarm_control_panel";

@@ -35,26 +34,12 @@ void AlarmControlPanel::publish_state(AlarmControlPanelState state) {
    ESP_LOGD(TAG, "Set state to: %s, previous: %s", LOG_STR_ARG(alarm_control_panel_state_to_string(state)),
             LOG_STR_ARG(alarm_control_panel_state_to_string(prev_state)));
    this->current_state_ = state;
+    // Single state callback - triggers check get_state() for specific states
    this->state_callback_.call();
 #if defined(USE_ALARM_CONTROL_PANEL) && defined(USE_CONTROLLER_REGISTRY)
    ControllerRegistry::notify_alarm_control_panel_update(this);
 #endif
-    if (state == ACP_STATE_TRIGGERED) {
-      this->triggered_callback_.call();
-    } else if (state == ACP_STATE_ARMING) {
-      this->arming_callback_.call();
-    } else if (state == ACP_STATE_PENDING) {
-      this->pending_callback_.call();
-    } else if (state == ACP_STATE_ARMED_HOME) {
-      this->armed_home_callback_.call();
-    } else if (state == ACP_STATE_ARMED_NIGHT) {
-      this->armed_night_callback_.call();
-    } else if (state == ACP_STATE_ARMED_AWAY) {
-      this->armed_away_callback_.call();
-    } else if (state == ACP_STATE_DISARMED) {
-      this->disarmed_callback_.call();
-    }
-
+    // Cleared fires when leaving TRIGGERED state
    if (prev_state == ACP_STATE_TRIGGERED) {
      this->cleared_callback_.call();
    }
@@ -69,34 +54,6 @@ void AlarmControlPanel::add_on_state_callback(std::function<void()> &&callback)
  this->state_callback_.add(std::move(callback));
 }

-void AlarmControlPanel::add_on_triggered_callback(std::function<void()> &&callback) {
-  this->triggered_callback_.add(std::move(callback));
-}
-
-void AlarmControlPanel::add_on_arming_callback(std::function<void()> &&callback) {
-  this->arming_callback_.add(std::move(callback));
-}
-
-void AlarmControlPanel::add_on_armed_home_callback(std::function<void()> &&callback) {
-  this->armed_home_callback_.add(std::move(callback));
-}
-
-void AlarmControlPanel::add_on_armed_night_callback(std::function<void()> &&callback) {
-  this->armed_night_callback_.add(std::move(callback));
-}
-
-void AlarmControlPanel::add_on_armed_away_callback(std::function<void()> &&callback) {
-  this->armed_away_callback_.add(std::move(callback));
-}
-
-void AlarmControlPanel::add_on_pending_callback(std::function<void()> &&callback) {
-  this->pending_callback_.add(std::move(callback));
-}
-
-void AlarmControlPanel::add_on_disarmed_callback(std::function<void()> &&callback) {
-  this->disarmed_callback_.add(std::move(callback));
-}
-
 void AlarmControlPanel::add_on_cleared_callback(std::function<void()> &&callback) {
  this->cleared_callback_.add(std::move(callback));
 }
@@ -157,5 +114,4 @@ void AlarmControlPanel::disarm(optional<std::string> code) {
  call.perform();
 }

-}  // namespace alarm_control_panel
-}  // namespace esphome
+}  // namespace esphome::alarm_control_panel
--- a/esphome/components/alarm_control_panel/alarm_control_panel.h
+++ b/esphome/components/alarm_control_panel/alarm_control_panel.h
@@ -1,7 +1,5 @@
 #pragma once

-#include <map>
-
 #include "alarm_control_panel_call.h"
 #include "alarm_control_panel_state.h"

@@ -9,8 +7,7 @@
 #include "esphome/core/entity_base.h"
 #include "esphome/core/log.h"

-namespace esphome {
-namespace alarm_control_panel {
+namespace esphome::alarm_control_panel {

 enum AlarmControlPanelFeature : uint8_t {
  // Matches Home Assistant values
@@ -35,54 +32,13 @@ class AlarmControlPanel : public EntityBase {
   */
  void publish_state(AlarmControlPanelState state);

-  /** Add a callback for when the state of the alarm_control_panel changes
+  /** Add a callback for when the state of the alarm_control_panel changes.
+   * Triggers can check get_state() to determine the new state.
   *
   * @param callback The callback function
   */
  void add_on_state_callback(std::function<void()> &&callback);

-  /** Add a callback for when the state of the alarm_control_panel chanes to triggered
-   *
-   * @param callback The callback function
-   */
-  void add_on_triggered_callback(std::function<void()> &&callback);
-
-  /** Add a callback for when the state of the alarm_control_panel chanes to arming
-   *
-   * @param callback The callback function
-   */
-  void add_on_arming_callback(std::function<void()> &&callback);
-
-  /** Add a callback for when the state of the alarm_control_panel changes to pending
-   *
-   * @param callback The callback function
-   */
-  void add_on_pending_callback(std::function<void()> &&callback);
-
-  /** Add a callback for when the state of the alarm_control_panel changes to armed_home
-   *
-   * @param callback The callback function
-   */
-  void add_on_armed_home_callback(std::function<void()> &&callback);
-
-  /** Add a callback for when the state of the alarm_control_panel changes to armed_night
-   *
-   * @param callback The callback function
-   */
-  void add_on_armed_night_callback(std::function<void()> &&callback);
-
-  /** Add a callback for when the state of the alarm_control_panel changes to armed_away
-   *
-   * @param callback The callback function
-   */
-  void add_on_armed_away_callback(std::function<void()> &&callback);
-
-  /** Add a callback for when the state of the alarm_control_panel changes to disarmed
-   *
-   * @param callback The callback function
-   */
-  void add_on_disarmed_callback(std::function<void()> &&callback);
-
  /** Add a callback for when the state of the alarm_control_panel clears from triggered
   *
   * @param callback The callback function
@@ -172,29 +128,14 @@ class AlarmControlPanel : public EntityBase {
  uint32_t last_update_;
  // the call control function
  virtual void control(const AlarmControlPanelCall &call) = 0;
-  // state callback
-  CallbackManager<void()> state_callback_{};
-  // trigger callback
-  CallbackManager<void()> triggered_callback_{};
-  // arming callback
-  CallbackManager<void()> arming_callback_{};
-  // pending callback
-  CallbackManager<void()> pending_callback_{};
-  // armed_home callback
-  CallbackManager<void()> armed_home_callback_{};
-  // armed_night callback
-  CallbackManager<void()> armed_night_callback_{};
-  // armed_away callback
-  CallbackManager<void()> armed_away_callback_{};
-  // disarmed callback
-  CallbackManager<void()> disarmed_callback_{};
-  // clear callback
-  CallbackManager<void()> cleared_callback_{};
+  // state callback - triggers check get_state() for specific state
+  LazyCallbackManager<void()> state_callback_{};
+  // clear callback - fires when leaving TRIGGERED state
+  LazyCallbackManager<void()> cleared_callback_{};
  // chime callback
-  CallbackManager<void()> chime_callback_{};
+  LazyCallbackManager<void()> chime_callback_{};
  // ready callback
-  CallbackManager<void()> ready_callback_{};
+  LazyCallbackManager<void()> ready_callback_{};
 };

-}  // namespace alarm_control_panel
-}  // namespace esphome
+}  // namespace esphome::alarm_control_panel
--- a/esphome/components/alarm_control_panel/alarm_control_panel_call.cpp
+++ b/esphome/components/alarm_control_panel/alarm_control_panel_call.cpp
@@ -4,8 +4,7 @@

 #include "esphome/core/log.h"

-namespace esphome {
-namespace alarm_control_panel {
+namespace esphome::alarm_control_panel {

 static const char *const TAG = "alarm_control_panel";

@@ -99,5 +98,4 @@ void AlarmControlPanelCall::perform() {
  }
 }

-}  // namespace alarm_control_panel
-}  // namespace esphome
+}  // namespace esphome::alarm_control_panel
--- a/esphome/components/alarm_control_panel/alarm_control_panel_call.h
+++ b/esphome/components/alarm_control_panel/alarm_control_panel_call.h
@@ -6,8 +6,7 @@

 #include "esphome/core/helpers.h"

-namespace esphome {
-namespace alarm_control_panel {
+namespace esphome::alarm_control_panel {

 class AlarmControlPanel;

@@ -36,5 +35,4 @@ class AlarmControlPanelCall {
  void validate_();
 };

-}  // namespace alarm_control_panel
-}  // namespace esphome
+}  // namespace esphome::alarm_control_panel
--- a/esphome/components/alarm_control_panel/alarm_control_panel_state.cpp
+++ b/esphome/components/alarm_control_panel/alarm_control_panel_state.cpp
@@ -1,7 +1,6 @@
 #include "alarm_control_panel_state.h"

-namespace esphome {
-namespace alarm_control_panel {
+namespace esphome::alarm_control_panel {

 const LogString *alarm_control_panel_state_to_string(AlarmControlPanelState state) {
  switch (state) {
@@ -30,5 +29,4 @@ const LogString *alarm_control_panel_state_to_string(AlarmControlPanelState stat
  }
 }

-}  // namespace alarm_control_panel
-}  // namespace esphome
+}  // namespace esphome::alarm_control_panel
--- a/esphome/components/alarm_control_panel/alarm_control_panel_state.h
+++ b/esphome/components/alarm_control_panel/alarm_control_panel_state.h
@@ -3,8 +3,7 @@
 #include <cstdint>
 #include "esphome/core/log.h"

-namespace esphome {
-namespace alarm_control_panel {
+namespace esphome::alarm_control_panel {

 enum AlarmControlPanelState : uint8_t {
  ACP_STATE_DISARMED = 0,
@@ -25,5 +24,4 @@ enum AlarmControlPanelState : uint8_t {
 */
 const LogString *alarm_control_panel_state_to_string(AlarmControlPanelState state);

-}  // namespace alarm_control_panel
-}  // namespace esphome
+}  // namespace esphome::alarm_control_panel
--- a/esphome/components/alarm_control_panel/automation.h
+++ b/esphome/components/alarm_control_panel/automation.h
@@ -3,9 +3,9 @@
 #include "esphome/core/automation.h"
 #include "alarm_control_panel.h"

-namespace esphome {
-namespace alarm_control_panel {
+namespace esphome::alarm_control_panel {

+/// Trigger on any state change
 class StateTrigger : public Trigger<> {
 public:
  explicit StateTrigger(AlarmControlPanel *alarm_control_panel) {
@@ -13,55 +13,30 @@ class StateTrigger : public Trigger<> {
  }
 };

-class TriggeredTrigger : public Trigger<> {
+/// Template trigger that fires when entering a specific state
+template<AlarmControlPanelState State> class StateEnterTrigger : public Trigger<> {
 public:
-  explicit TriggeredTrigger(AlarmControlPanel *alarm_control_panel) {
-    alarm_control_panel->add_on_triggered_callback([this]() { this->trigger(); });
+  explicit StateEnterTrigger(AlarmControlPanel *alarm_control_panel) : alarm_control_panel_(alarm_control_panel) {
+    alarm_control_panel->add_on_state_callback([this]() {
+      if (this->alarm_control_panel_->get_state() == State)
+        this->trigger();
+    });
  }
+
+ protected:
+  AlarmControlPanel *alarm_control_panel_;
 };

-class ArmingTrigger : public Trigger<> {
- public:
-  explicit ArmingTrigger(AlarmControlPanel *alarm_control_panel) {
-    alarm_control_panel->add_on_arming_callback([this]() { this->trigger(); });
-  }
-};
-
-class PendingTrigger : public Trigger<> {
- public:
-  explicit PendingTrigger(AlarmControlPanel *alarm_control_panel) {
-    alarm_control_panel->add_on_pending_callback([this]() { this->trigger(); });
-  }
-};
-
-class ArmedHomeTrigger : public Trigger<> {
- public:
-  explicit ArmedHomeTrigger(AlarmControlPanel *alarm_control_panel) {
-    alarm_control_panel->add_on_armed_home_callback([this]() { this->trigger(); });
-  }
-};
-
-class ArmedNightTrigger : public Trigger<> {
- public:
-  explicit ArmedNightTrigger(AlarmControlPanel *alarm_control_panel) {
-    alarm_control_panel->add_on_armed_night_callback([this]() { this->trigger(); });
-  }
-};
-
-class ArmedAwayTrigger : public Trigger<> {
- public:
-  explicit ArmedAwayTrigger(AlarmControlPanel *alarm_control_panel) {
-    alarm_control_panel->add_on_armed_away_callback([this]() { this->trigger(); });
-  }
-};
-
-class DisarmedTrigger : public Trigger<> {
- public:
-  explicit DisarmedTrigger(AlarmControlPanel *alarm_control_panel) {
-    alarm_control_panel->add_on_disarmed_callback([this]() { this->trigger(); });
-  }
-};
+// Type aliases for state-specific triggers
+using TriggeredTrigger = StateEnterTrigger<ACP_STATE_TRIGGERED>;
+using ArmingTrigger = StateEnterTrigger<ACP_STATE_ARMING>;
+using PendingTrigger = StateEnterTrigger<ACP_STATE_PENDING>;
+using ArmedHomeTrigger = StateEnterTrigger<ACP_STATE_ARMED_HOME>;
+using ArmedNightTrigger = StateEnterTrigger<ACP_STATE_ARMED_NIGHT>;
+using ArmedAwayTrigger = StateEnterTrigger<ACP_STATE_ARMED_AWAY>;
+using DisarmedTrigger = StateEnterTrigger<ACP_STATE_DISARMED>;

+/// Trigger when leaving TRIGGERED state (alarm cleared)
 class ClearedTrigger : public Trigger<> {
 public:
  explicit ClearedTrigger(AlarmControlPanel *alarm_control_panel) {
@@ -69,6 +44,7 @@ class ClearedTrigger : public Trigger<> {
  }
 };

+/// Trigger on chime event (zone opened while disarmed)
 class ChimeTrigger : public Trigger<> {
 public:
  explicit ChimeTrigger(AlarmControlPanel *alarm_control_panel) {
@@ -76,6 +52,7 @@ class ChimeTrigger : public Trigger<> {
  }
 };

+/// Trigger on ready state change
 class ReadyTrigger : public Trigger<> {
 public:
  explicit ReadyTrigger(AlarmControlPanel *alarm_control_panel) {
@@ -187,5 +164,4 @@ template<typename... Ts> class AlarmControlPanelCondition : public Condition<Ts.
  AlarmControlPanel *parent_;
 };

-}  // namespace alarm_control_panel
-}  // namespace esphome
+}  // namespace esphome::alarm_control_panel
--- a/esphome/components/alpha3/alpha3.h
+++ b/esphome/components/alpha3/alpha3.h
@@ -15,10 +15,8 @@ namespace alpha3 {
 namespace espbt = esphome::esp32_ble_tracker;

 static const espbt::ESPBTUUID ALPHA3_GENI_SERVICE_UUID = espbt::ESPBTUUID::from_uint16(0xfe5d);
-static const espbt::ESPBTUUID ALPHA3_GENI_CHARACTERISTIC_UUID =
-    espbt::ESPBTUUID::from_raw({static_cast<char>(0xa9), 0x7b, static_cast<char>(0xb8), static_cast<char>(0x85), 0x0,
-                                0x1a, 0x28, static_cast<char>(0xaa), 0x2a, 0x43, 0x6e, 0x3, static_cast<char>(0xd1),
-                                static_cast<char>(0xff), static_cast<char>(0x9c), static_cast<char>(0x85)});
+static const espbt::ESPBTUUID ALPHA3_GENI_CHARACTERISTIC_UUID = espbt::ESPBTUUID::from_raw(
+    {0xa9, 0x7b, 0xb8, 0x85, 0x00, 0x1a, 0x28, 0xaa, 0x2a, 0x43, 0x6e, 0x03, 0xd1, 0xff, 0x9c, 0x85});
 static const int16_t GENI_RESPONSE_HEADER_LENGTH = 13;
 static const size_t GENI_RESPONSE_TYPE_LENGTH = 8;

--- a/esphome/components/anova/anova.cpp
+++ b/esphome/components/anova/anova.cpp
@@ -67,8 +67,10 @@ void Anova::gattc_event_handler(esp_gattc_cb_event_t event, esp_gatt_if_t gattc_
    case ESP_GATTC_SEARCH_CMPL_EVT: {
      auto *chr = this->parent_->get_characteristic(ANOVA_SERVICE_UUID, ANOVA_CHARACTERISTIC_UUID);
      if (chr == nullptr) {
-        ESP_LOGW(TAG, "[%s] No control service found at device, not an Anova..?", this->get_name().c_str());
-        ESP_LOGW(TAG, "[%s] Note, this component does not currently support Anova Nano.", this->get_name().c_str());
+        ESP_LOGW(TAG,
+                 "[%s] No control service found at device, not an Anova..?\n"
+                 "[%s] Note, this component does not currently support Anova Nano.",
+                 this->get_name().c_str(), this->get_name().c_str());
        break;
      }
      this->char_handle_ = chr->handle;
--- a/esphome/components/api/init.py
+++ b/esphome/components/api/init.py
@@ -226,32 +226,6 @@ def _encryption_schema(config):
    return ENCRYPTION_SCHEMA(config)


-def _validate_api_config(config: ConfigType) -> ConfigType:
-    """Validate API configuration with mutual exclusivity check and deprecation warning."""
-    # Check if both password and encryption are configured
-    has_password = CONF_PASSWORD in config and config[CONF_PASSWORD]
-    has_encryption = CONF_ENCRYPTION in config
-
-    if has_password and has_encryption:
-        raise cv.Invalid(
-            "The 'password' and 'encryption' options are mutually exclusive. "
-            "The API client only supports one authentication method at a time. "
-            "Please remove one of them. "
-            "Note: 'password' authentication is deprecated and will be removed in version 2026.1.0. "
-            "We strongly recommend using 'encryption' instead for better security."
-        )
-
-    # Warn about password deprecation
-    if has_password:
-        _LOGGER.warning(
-            "API 'password' authentication has been deprecated since May 2022 and will be removed in version 2026.1.0. "
-            "Please migrate to the 'encryption' configuration. "
-            "See https://esphome.io/components/api/#configuration-variables"
-        )
-
-    return config
-
-
 def _consume_api_sockets(config: ConfigType) -> ConfigType:
    """Register socket needs for API component."""
    from esphome.components import socket
@@ -268,7 +242,17 @@ CONFIG_SCHEMA = cv.All(
        {
            cv.GenerateID(): cv.declare_id(APIServer),
            cv.Optional(CONF_PORT, default=6053): cv.port,
-            cv.Optional(CONF_PASSWORD, default=""): cv.string_strict,
+            # Removed in 2026.1.0 - kept to provide helpful error message
+            cv.Optional(CONF_PASSWORD): cv.invalid(
+                "The 'password' option has been removed in ESPHome 2026.1.0.\n"
+                "Password authentication was deprecated in May 2022.\n"
+                "Please migrate to encryption for secure API communication:\n\n"
+                "api:\n"
+                "  encryption:\n"
+                "    key: !secret api_encryption_key\n\n"
+                "Generate a key with: openssl rand -base64 32\n"
+                "Or visit https://esphome.io/components/api/#configuration-variables"
+            ),
            cv.Optional(
                CONF_REBOOT_TIMEOUT, default="15min"
            ): cv.positive_time_period_milliseconds,
@@ -330,7 +314,6 @@ CONFIG_SCHEMA = cv.All(
        }
    ).extend(cv.COMPONENT_SCHEMA),
    cv.rename_key(CONF_SERVICES, CONF_ACTIONS),
-    _validate_api_config,
    _consume_api_sockets,
 )

@@ -344,9 +327,6 @@ async def to_code(config: ConfigType) -> None:
    CORE.register_controller()

    cg.add(var.set_port(config[CONF_PORT]))
-    if config[CONF_PASSWORD]:
-        cg.add_define("USE_API_PASSWORD")
-        cg.add(var.set_password(config[CONF_PASSWORD]))
    cg.add(var.set_reboot_timeout(config[CONF_REBOOT_TIMEOUT]))
    cg.add(var.set_batch_delay(config[CONF_BATCH_DELAY]))
    if CONF_LISTEN_BACKLOG in config:
--- a/esphome/components/api/api.proto
+++ b/esphome/components/api/api.proto
@@ -7,10 +7,7 @@ service APIConnection {
    option (needs_setup_connection) = false;
    option (needs_authentication) = false;
  }
-  rpc authenticate (AuthenticationRequest) returns (AuthenticationResponse) {
-    option (needs_setup_connection) = false;
-    option (needs_authentication) = false;
-  }
+  // REMOVED in ESPHome 2026.1.0: rpc authenticate (AuthenticationRequest) returns (AuthenticationResponse)
  rpc disconnect (DisconnectRequest) returns (DisconnectResponse) {
    option (needs_setup_connection) = false;
    option (needs_authentication) = false;
@@ -82,14 +79,13 @@ service APIConnection {
 //  * VarInt denoting the type of message.
 //  * The message object encoded as a ProtoBuf message

-// The connection is established in 4 steps:
+// The connection is established in 2 steps:
 //  * First, the client connects to the server and sends a "Hello Request" identifying itself
-//  * The server responds with a "Hello Response" and selects the protocol version
-//  * After receiving this message, the client attempts to authenticate itself using
-//    the password and a "Connect Request"
-//  * The server responds with a "Connect Response" and notifies of invalid password.
+//  * The server responds with a "Hello Response" and the connection is authenticated
 // If anything in this initial process fails, the connection must immediately closed
 // by both sides and _no_ disconnection message is to be sent.
+// Note: Password authentication via AuthenticationRequest/AuthenticationResponse (message IDs 3, 4)
+// was removed in ESPHome 2026.1.0. Those message IDs are reserved and should not be reused.

 // Message sent at the beginning of each connection
 // Can only be sent by the client and only at the beginning of the connection
@@ -102,7 +98,7 @@ message HelloRequest {
  // For example "Home Assistant"
  // Not strictly necessary to send but nice for debugging
  // purposes.
-  string client_info = 1 [(pointer_to_buffer) = true];
+  string client_info = 1;
  uint32 api_version_major = 2;
  uint32 api_version_minor = 3;
 }
@@ -130,25 +126,23 @@ message HelloResponse {
  string name = 4;
 }

-// Message sent at the beginning of each connection to authenticate the client
-// Can only be sent by the client and only at the beginning of the connection
+// DEPRECATED in ESPHome 2026.1.0 - Password authentication is no longer supported.
+// These messages are kept for protocol documentation but are not processed by the server.
+// Use noise encryption instead: https://esphome.io/components/api/#configuration-variables
 message AuthenticationRequest {
  option (id) = 3;
  option (source) = SOURCE_CLIENT;
  option (no_delay) = true;
-  option (ifdef) = "USE_API_PASSWORD";
+  option deprecated = true;

-  // The password to log in with
-  string password = 1 [(pointer_to_buffer) = true];
+  string password = 1;
 }

-// Confirmation of successful connection. After this the connection is available for all traffic.
-// Can only be sent by the server and only at the beginning of the connection
 message AuthenticationResponse {
  option (id) = 4;
  option (source) = SOURCE_SERVER;
  option (no_delay) = true;
-  option (ifdef) = "USE_API_PASSWORD";
+  option deprecated = true;

  bool invalid_password = 1;
 }
@@ -205,7 +199,9 @@ message DeviceInfoResponse {
  option (id) = 10;
  option (source) = SOURCE_SERVER;

-  bool uses_password = 1 [(field_ifdef) = "USE_API_PASSWORD"];
+  // Deprecated in ESPHome 2026.1.0, but kept for backward compatibility
+  // with older ESPHome versions that still send this field.
+  bool uses_password = 1 [deprecated = true];

  // The name of the node, given by "App.set_name()"
  string name = 2;
@@ -579,7 +575,7 @@ message LightCommandRequest {
  bool has_flash_length = 16;
  uint32 flash_length = 17;
  bool has_effect = 18;
-  string effect = 19 [(pointer_to_buffer) = true];
+  string effect = 19;
  uint32 device_id = 28 [(field_ifdef) = "USE_DEVICES"];
 }

@@ -796,7 +792,7 @@ message HomeassistantActionResponse {
  uint32 call_id = 1; // Matches the call_id from HomeassistantActionRequest
  bool success = 2; // Whether the service call succeeded
  string error_message = 3; // Error message if success = false
-  bytes response_data = 4 [(pointer_to_buffer) = true, (field_ifdef) = "USE_API_HOMEASSISTANT_ACTION_RESPONSES_JSON"];
+  bytes response_data = 4 [(field_ifdef) = "USE_API_HOMEASSISTANT_ACTION_RESPONSES_JSON"];
 }

 // ==================== IMPORT HOME ASSISTANT STATES ====================
@@ -841,7 +837,7 @@ message GetTimeResponse {
  option (no_delay) = true;

  fixed32 epoch_seconds = 1;
-  string timezone = 2 [(pointer_to_buffer) = true];
+  string timezone = 2;
 }

 // ==================== USER-DEFINES SERVICES ====================
@@ -1101,6 +1097,85 @@ message ClimateCommandRequest {
  uint32 device_id = 24 [(field_ifdef) = "USE_DEVICES"];
 }

+// ==================== WATER_HEATER ====================
+enum WaterHeaterMode {
+  WATER_HEATER_MODE_OFF = 0;
+  WATER_HEATER_MODE_ECO = 1;
+  WATER_HEATER_MODE_ELECTRIC = 2;
+  WATER_HEATER_MODE_PERFORMANCE = 3;
+  WATER_HEATER_MODE_HIGH_DEMAND = 4;
+  WATER_HEATER_MODE_HEAT_PUMP = 5;
+  WATER_HEATER_MODE_GAS = 6;
+}
+
+message ListEntitiesWaterHeaterResponse {
+  option (id) = 132;
+  option (base_class) = "InfoResponseProtoMessage";
+  option (source) = SOURCE_SERVER;
+  option (ifdef) = "USE_WATER_HEATER";
+
+  string object_id = 1;
+  fixed32 key = 2;
+  string name = 3;
+  string icon = 4 [(field_ifdef) = "USE_ENTITY_ICON"];
+  bool disabled_by_default = 5;
+  EntityCategory entity_category = 6;
+  uint32 device_id = 7 [(field_ifdef) = "USE_DEVICES"];
+  float min_temperature = 8;
+  float max_temperature = 9;
+  float target_temperature_step = 10;
+  repeated WaterHeaterMode supported_modes = 11 [(container_pointer_no_template) = "water_heater::WaterHeaterModeMask"];
+  // Bitmask of WaterHeaterFeature flags
+  uint32 supported_features = 12;
+}
+
+message WaterHeaterStateResponse {
+  option (id) = 133;
+  option (base_class) = "StateResponseProtoMessage";
+  option (source) = SOURCE_SERVER;
+  option (ifdef) = "USE_WATER_HEATER";
+  option (no_delay) = true;
+
+  fixed32 key = 1;
+  float current_temperature = 2;
+  float target_temperature = 3;
+  WaterHeaterMode mode = 4;
+  uint32 device_id = 5 [(field_ifdef) = "USE_DEVICES"];
+  // Bitmask of current state flags (bit 0 = away, bit 1 = on)
+  uint32 state = 6;
+  float target_temperature_low = 7;
+  float target_temperature_high = 8;
+}
+
+// Bitmask for WaterHeaterCommandRequest.has_fields
+enum WaterHeaterCommandHasField {
+  WATER_HEATER_COMMAND_HAS_NONE = 0;
+  WATER_HEATER_COMMAND_HAS_MODE = 1;
+  WATER_HEATER_COMMAND_HAS_TARGET_TEMPERATURE = 2;
+  WATER_HEATER_COMMAND_HAS_STATE = 4;
+  WATER_HEATER_COMMAND_HAS_TARGET_TEMPERATURE_LOW = 8;
+  WATER_HEATER_COMMAND_HAS_TARGET_TEMPERATURE_HIGH = 16;
+}
+
+message WaterHeaterCommandRequest {
+  option (id) = 134;
+  option (source) = SOURCE_CLIENT;
+  option (ifdef) = "USE_WATER_HEATER";
+  option (no_delay) = true;
+  option (base_class) = "CommandProtoMessage";
+
+  fixed32 key = 1;
+  // Bitmask of which fields are set (see WaterHeaterCommandHasField)
+  uint32 has_fields = 2;
+  WaterHeaterMode mode = 3;
+  float target_temperature = 4;
+  uint32 device_id = 5 [(field_ifdef) = "USE_DEVICES"];
+  // State flags bitmask (bit 0 = away, bit 1 = on)
+  uint32 state = 6;
+  float target_temperature_low = 7;
+  float target_temperature_high = 8;
+}
+
 // ==================== NUMBER ====================
 enum NumberMode {
  NUMBER_MODE_AUTO = 0;
@@ -1195,7 +1270,7 @@ message SelectCommandRequest {
  option (base_class) = "CommandProtoMessage";

  fixed32 key = 1;
-  string state = 2 [(pointer_to_buffer) = true];
+  string state = 2;
  uint32 device_id = 3 [(field_ifdef) = "USE_DEVICES"];
 }

@@ -1213,7 +1288,7 @@ message ListEntitiesSirenResponse {

  string icon = 5 [(field_ifdef) = "USE_ENTITY_ICON"];
  bool disabled_by_default = 6;
-  repeated string tones = 7;
+  repeated string tones = 7 [(container_pointer_no_template) = "FixedVector<const char *>"];
  bool supports_duration = 8;
  bool supports_volume = 9;
  EntityCategory entity_category = 10;
@@ -1613,7 +1688,7 @@ message BluetoothGATTWriteRequest {
  uint32 handle = 2;
  bool response = 3;

-  bytes data = 4 [(pointer_to_buffer) = true];
+  bytes data = 4;
 }

 message BluetoothGATTReadDescriptorRequest {
@@ -1633,7 +1708,7 @@ message BluetoothGATTWriteDescriptorRequest {
  uint64 address = 1;
  uint32 handle = 2;

-  bytes data = 3 [(pointer_to_buffer) = true];
+  bytes data = 3;
 }

 message BluetoothGATTNotifyRequest {
@@ -1858,7 +1933,7 @@ message VoiceAssistantAudio {
  option (source) = SOURCE_BOTH;
  option (ifdef) = "USE_VOICE_ASSISTANT";

-  bytes data = 1;
+  bytes data = 1 [(pointer_to_buffer) = true];
  bool end = 2;
 }

@@ -2346,7 +2421,7 @@ message ZWaveProxyFrame {
  option (ifdef) = "USE_ZWAVE_PROXY";
  option (no_delay) = true;

-  bytes data = 1 [(pointer_to_buffer) = true];
+  bytes data = 1;
 }

 enum ZWaveProxyRequestType {
@@ -2360,5 +2435,5 @@ message ZWaveProxyRequest {
  option (ifdef) = "USE_ZWAVE_PROXY";

  ZWaveProxyRequestType type = 1;
-  bytes data = 2 [(pointer_to_buffer) = true];
+  bytes data = 2;
 }
--- a/esphome/components/api/api_connection.cpp
+++ b/esphome/components/api/api_connection.cpp
@@ -13,6 +13,7 @@
 #include <cinttypes>
 #include <functional>
 #include <limits>
+#include <new>
 #include <utility>
 #ifdef USE_ESP8266
 #include <pgmspace.h>
@@ -42,6 +43,9 @@
 #ifdef USE_ZWAVE_PROXY
 #include "esphome/components/zwave_proxy/zwave_proxy.h"
 #endif
+#ifdef USE_WATER_HEATER
+#include "esphome/components/water_heater/water_heater.h"
+#endif

 namespace esphome::api {

@@ -93,21 +97,18 @@ static const int CAMERA_STOP_STREAM = 5000;
    return;
 #endif  // USE_DEVICES

-APIConnection::APIConnection(std::unique_ptr<socket::Socket> sock, APIServer *parent)
-    : parent_(parent), initial_state_iterator_(this), list_entities_iterator_(this) {
+APIConnection::APIConnection(std::unique_ptr<socket::Socket> sock, APIServer *parent) : parent_(parent) {
 #if defined(USE_API_PLAINTEXT) && defined(USE_API_NOISE)
  auto &noise_ctx = parent->get_noise_ctx();
  if (noise_ctx.has_psk()) {
-    this->helper_ =
-        std::unique_ptr<APIFrameHelper>{new APINoiseFrameHelper(std::move(sock), noise_ctx, &this->client_info_)};
+    this->helper_ = std::unique_ptr<APIFrameHelper>{new APINoiseFrameHelper(std::move(sock), noise_ctx)};
  } else {
-    this->helper_ = std::unique_ptr<APIFrameHelper>{new APIPlaintextFrameHelper(std::move(sock), &this->client_info_)};
+    this->helper_ = std::unique_ptr<APIFrameHelper>{new APIPlaintextFrameHelper(std::move(sock))};
  }
 #elif defined(USE_API_PLAINTEXT)
-  this->helper_ = std::unique_ptr<APIFrameHelper>{new APIPlaintextFrameHelper(std::move(sock), &this->client_info_)};
+  this->helper_ = std::unique_ptr<APIFrameHelper>{new APIPlaintextFrameHelper(std::move(sock))};
 #elif defined(USE_API_NOISE)
-  this->helper_ = std::unique_ptr<APIFrameHelper>{
-      new APINoiseFrameHelper(std::move(sock), parent->get_noise_ctx(), &this->client_info_)};
+  this->helper_ = std::unique_ptr<APIFrameHelper>{new APINoiseFrameHelper(std::move(sock), parent->get_noise_ctx())};
 #else
 #error "No frame helper defined"
 #endif
@@ -128,11 +129,13 @@ void APIConnection::start() {
    this->fatal_error_with_log_(LOG_STR("Helper init failed"), err);
    return;
  }
-  this->client_info_.peername = helper_->getpeername();
-  this->client_info_.name = this->client_info_.peername;
+  // Initialize client name with peername (IP address) until Hello message provides actual name
+  const char *peername = this->helper_->get_client_peername();
+  this->helper_->set_client_name(peername, strlen(peername));
 }

 APIConnection::~APIConnection() {
+  this->destroy_active_iterator_();
 #ifdef USE_BLUETOOTH_PROXY
  if (bluetooth_proxy::global_bluetooth_proxy->get_api_connection() == this) {
    bluetooth_proxy::global_bluetooth_proxy->unsubscribe_api_connection(this);
@@ -145,6 +148,32 @@ APIConnection::~APIConnection() {
 #endif
 }

+void APIConnection::destroy_active_iterator_() {
+  switch (this->active_iterator_) {
+    case ActiveIterator::LIST_ENTITIES:
+      this->iterator_storage_.list_entities.~ListEntitiesIterator();
+      break;
+    case ActiveIterator::INITIAL_STATE:
+      this->iterator_storage_.initial_state.~InitialStateIterator();
+      break;
+    case ActiveIterator::NONE:
+      break;
+  }
+  this->active_iterator_ = ActiveIterator::NONE;
+}
+
+void APIConnection::begin_iterator_(ActiveIterator type) {
+  this->destroy_active_iterator_();
+  this->active_iterator_ = type;
+  if (type == ActiveIterator::LIST_ENTITIES) {
+    new (&this->iterator_storage_.list_entities) ListEntitiesIterator(this);
+    this->iterator_storage_.list_entities.begin();
+  } else {
+    new (&this->iterator_storage_.initial_state) InitialStateIterator(this);
+    this->iterator_storage_.initial_state.begin();
+  }
+}
+
 void APIConnection::loop() {
  if (this->flags_.next_close) {
    // requested a disconnect
@@ -187,31 +216,42 @@ void APIConnection::loop() {
    this->process_batch_();
  }

-  if (!this->list_entities_iterator_.completed()) {
-    this->process_iterator_batch_(this->list_entities_iterator_);
-  } else if (!this->initial_state_iterator_.completed()) {
-    this->process_iterator_batch_(this->initial_state_iterator_);
-
-    // If we've completed initial states, process any remaining and clear the flag
-    if (this->initial_state_iterator_.completed()) {
-      // Process any remaining batched messages immediately
-      if (!this->deferred_batch_.empty()) {
-        this->process_batch_();
+  switch (this->active_iterator_) {
+    case ActiveIterator::LIST_ENTITIES:
+      if (this->iterator_storage_.list_entities.completed()) {
+        this->destroy_active_iterator_();
+        if (this->flags_.state_subscription) {
+          this->begin_iterator_(ActiveIterator::INITIAL_STATE);
+        }
+      } else {
+        this->process_iterator_batch_(this->iterator_storage_.list_entities);
      }
-      // Now that everything is sent, enable immediate sending for future state changes
-      this->flags_.should_try_send_immediately = true;
-      // Release excess memory from buffers that grew during initial sync
-      this->deferred_batch_.release_buffer();
-      this->helper_->release_buffers();
-    }
+      break;
+    case ActiveIterator::INITIAL_STATE:
+      if (this->iterator_storage_.initial_state.completed()) {
+        this->destroy_active_iterator_();
+        // Process any remaining batched messages immediately
+        if (!this->deferred_batch_.empty()) {
+          this->process_batch_();
+        }
+        // Now that everything is sent, enable immediate sending for future state changes
+        this->flags_.should_try_send_immediately = true;
+        // Release excess memory from buffers that grew during initial sync
+        this->deferred_batch_.release_buffer();
+        this->helper_->release_buffers();
+      } else {
+        this->process_iterator_batch_(this->iterator_storage_.initial_state);
+      }
+      break;
+    case ActiveIterator::NONE:
+      break;
  }

  if (this->flags_.sent_ping) {
    // Disconnect if not responded within 2.5*keepalive
    if (now - this->last_traffic_ > KEEPALIVE_DISCONNECT_TIMEOUT) {
      on_fatal_error();
-      ESP_LOGW(TAG, "%s (%s) is unresponsive; disconnecting", this->client_info_.name.c_str(),
-               this->client_info_.peername.c_str());
+      this->log_client_(ESPHOME_LOG_LEVEL_WARN, LOG_STR("is unresponsive; disconnecting"));
    }
  } else if (now - this->last_traffic_ > KEEPALIVE_TIMEOUT_MS && !this->flags_.remove) {
    // Only send ping if we're not disconnecting
@@ -228,40 +268,24 @@ void APIConnection::loop() {
    }
  }

-#ifdef USE_CAMERA
-  if (this->image_reader_ && this->image_reader_->available() && this->helper_->can_write_without_blocking()) {
-    uint32_t to_send = std::min((size_t) MAX_BATCH_PACKET_SIZE, this->image_reader_->available());
-    bool done = this->image_reader_->available() == to_send;
-
-    CameraImageResponse msg;
-    msg.key = camera::Camera::instance()->get_object_id_hash();
-    msg.set_data(this->image_reader_->peek_data_buffer(), to_send);
-    msg.done = done;
-#ifdef USE_DEVICES
-    msg.device_id = camera::Camera::instance()->get_device_id();
-#endif
-
-    if (this->send_message_(msg, CameraImageResponse::MESSAGE_TYPE)) {
-      this->image_reader_->consume_data(to_send);
-      if (done) {
-        this->image_reader_->return_image();
-      }
-    }
-  }
-#endif
-
 #ifdef USE_API_HOMEASSISTANT_STATES
  if (state_subs_at_ >= 0) {
    this->process_state_subscriptions_();
  }
 #endif
+
+#ifdef USE_CAMERA
+  // Process camera last - state updates are higher priority
+  // (missing a frame is fine, missing a state update is not)
+  this->try_send_camera_image_();
+#endif
 }

 bool APIConnection::send_disconnect_response(const DisconnectRequest &msg) {
  // remote initiated disconnect_client
  // don't close yet, we still need to send the disconnect response
  // close will happen on next loop
-  ESP_LOGD(TAG, "%s (%s) disconnected", this->client_info_.name.c_str(), this->client_info_.peername.c_str());
+  this->log_client_(ESPHOME_LOG_LEVEL_DEBUG, LOG_STR("disconnected"));
  this->flags_.next_close = true;
  DisconnectResponse resp;
  return this->send_message(resp, DisconnectResponse::MESSAGE_TYPE);
@@ -352,7 +376,7 @@ uint16_t APIConnection::try_send_binary_sensor_info(EntityBase *entity, APIConne
                                                    bool is_single) {
  auto *binary_sensor = static_cast<binary_sensor::BinarySensor *>(entity);
  ListEntitiesBinarySensorResponse msg;
-  msg.set_device_class(binary_sensor->get_device_class_ref());
+  msg.device_class = binary_sensor->get_device_class_ref();
  msg.is_status_binary_sensor = binary_sensor->is_status_binary_sensor();
  return fill_and_encode_entity_info(binary_sensor, msg, ListEntitiesBinarySensorResponse::MESSAGE_TYPE, conn,
                                     remaining_size, is_single);
@@ -384,7 +408,7 @@ uint16_t APIConnection::try_send_cover_info(EntityBase *entity, APIConnection *c
  msg.supports_position = traits.get_supports_position();
  msg.supports_tilt = traits.get_supports_tilt();
  msg.supports_stop = traits.get_supports_stop();
-  msg.set_device_class(cover->get_device_class_ref());
+  msg.device_class = cover->get_device_class_ref();
  return fill_and_encode_entity_info(cover, msg, ListEntitiesCoverResponse::MESSAGE_TYPE, conn, remaining_size,
                                     is_single);
 }
@@ -419,7 +443,7 @@ uint16_t APIConnection::try_send_fan_state(EntityBase *entity, APIConnection *co
  if (traits.supports_direction())
    msg.direction = static_cast<enums::FanDirection>(fan->direction);
  if (traits.supports_preset_modes() && fan->has_preset_mode())
-    msg.set_preset_mode(StringRef(fan->get_preset_mode()));
+    msg.preset_mode = StringRef(fan->get_preset_mode());
  return fill_and_encode_entity_state(fan, msg, FanStateResponse::MESSAGE_TYPE, conn, remaining_size, is_single);
 }
 uint16_t APIConnection::try_send_fan_info(EntityBase *entity, APIConnection *conn, uint32_t remaining_size,
@@ -447,7 +471,7 @@ void APIConnection::fan_command(const FanCommandRequest &msg) {
  if (msg.has_direction)
    call.set_direction(static_cast<fan::FanDirection>(msg.direction));
  if (msg.has_preset_mode)
-    call.set_preset_mode(msg.preset_mode);
+    call.set_preset_mode(msg.preset_mode.c_str(), msg.preset_mode.size());
  call.perform();
 }
 #endif
@@ -475,7 +499,7 @@ uint16_t APIConnection::try_send_light_state(EntityBase *entity, APIConnection *
  resp.cold_white = values.get_cold_white();
  resp.warm_white = values.get_warm_white();
  if (light->supports_effects()) {
-    resp.set_effect(light->get_effect_name_ref());
+    resp.effect = light->get_effect_name_ref();
  }
  return fill_and_encode_entity_state(light, resp, LightStateResponse::MESSAGE_TYPE, conn, remaining_size, is_single);
 }
@@ -533,7 +557,7 @@ void APIConnection::light_command(const LightCommandRequest &msg) {
  if (msg.has_flash_length)
    call.set_flash_length(msg.flash_length);
  if (msg.has_effect)
-    call.set_effect(reinterpret_cast<const char *>(msg.effect), msg.effect_len);
+    call.set_effect(msg.effect.c_str(), msg.effect.size());
  call.perform();
 }
 #endif
@@ -557,10 +581,10 @@ uint16_t APIConnection::try_send_sensor_info(EntityBase *entity, APIConnection *
                                             bool is_single) {
  auto *sensor = static_cast<sensor::Sensor *>(entity);
  ListEntitiesSensorResponse msg;
-  msg.set_unit_of_measurement(sensor->get_unit_of_measurement_ref());
+  msg.unit_of_measurement = sensor->get_unit_of_measurement_ref();
  msg.accuracy_decimals = sensor->get_accuracy_decimals();
  msg.force_update = sensor->get_force_update();
-  msg.set_device_class(sensor->get_device_class_ref());
+  msg.device_class = sensor->get_device_class_ref();
  msg.state_class = static_cast<enums::SensorStateClass>(sensor->get_state_class());
  return fill_and_encode_entity_info(sensor, msg, ListEntitiesSensorResponse::MESSAGE_TYPE, conn, remaining_size,
                                     is_single);
@@ -587,7 +611,7 @@ uint16_t APIConnection::try_send_switch_info(EntityBase *entity, APIConnection *
  auto *a_switch = static_cast<switch_::Switch *>(entity);
  ListEntitiesSwitchResponse msg;
  msg.assumed_state = a_switch->assumed_state();
-  msg.set_device_class(a_switch->get_device_class_ref());
+  msg.device_class = a_switch->get_device_class_ref();
  return fill_and_encode_entity_info(a_switch, msg, ListEntitiesSwitchResponse::MESSAGE_TYPE, conn, remaining_size,
                                     is_single);
 }
@@ -612,7 +636,7 @@ uint16_t APIConnection::try_send_text_sensor_state(EntityBase *entity, APIConnec
                                                   bool is_single) {
  auto *text_sensor = static_cast<text_sensor::TextSensor *>(entity);
  TextSensorStateResponse resp;
-  resp.set_state(StringRef(text_sensor->state));
+  resp.state = StringRef(text_sensor->state);
  resp.missing_state = !text_sensor->has_state();
  return fill_and_encode_entity_state(text_sensor, resp, TextSensorStateResponse::MESSAGE_TYPE, conn, remaining_size,
                                      is_single);
@@ -621,7 +645,7 @@ uint16_t APIConnection::try_send_text_sensor_info(EntityBase *entity, APIConnect
                                                  bool is_single) {
  auto *text_sensor = static_cast<text_sensor::TextSensor *>(entity);
  ListEntitiesTextSensorResponse msg;
-  msg.set_device_class(text_sensor->get_device_class_ref());
+  msg.device_class = text_sensor->get_device_class_ref();
  return fill_and_encode_entity_info(text_sensor, msg, ListEntitiesTextSensorResponse::MESSAGE_TYPE, conn,
                                     remaining_size, is_single);
 }
@@ -651,13 +675,13 @@ uint16_t APIConnection::try_send_climate_state(EntityBase *entity, APIConnection
  if (traits.get_supports_fan_modes() && climate->fan_mode.has_value())
    resp.fan_mode = static_cast<enums::ClimateFanMode>(climate->fan_mode.value());
  if (!traits.get_supported_custom_fan_modes().empty() && climate->has_custom_fan_mode()) {
-    resp.set_custom_fan_mode(StringRef(climate->get_custom_fan_mode()));
+    resp.custom_fan_mode = StringRef(climate->get_custom_fan_mode());
  }
  if (traits.get_supports_presets() && climate->preset.has_value()) {
    resp.preset = static_cast<enums::ClimatePreset>(climate->preset.value());
  }
  if (!traits.get_supported_custom_presets().empty() && climate->has_custom_preset()) {
-    resp.set_custom_preset(StringRef(climate->get_custom_preset()));
+    resp.custom_preset = StringRef(climate->get_custom_preset());
  }
  if (traits.get_supports_swing_modes())
    resp.swing_mode = static_cast<enums::ClimateSwingMode>(climate->swing_mode);
@@ -712,11 +736,11 @@ void APIConnection::climate_command(const ClimateCommandRequest &msg) {
  if (msg.has_fan_mode)
    call.set_fan_mode(static_cast<climate::ClimateFanMode>(msg.fan_mode));
  if (msg.has_custom_fan_mode)
-    call.set_fan_mode(msg.custom_fan_mode);
+    call.set_fan_mode(msg.custom_fan_mode.c_str(), msg.custom_fan_mode.size());
  if (msg.has_preset)
    call.set_preset(static_cast<climate::ClimatePreset>(msg.preset));
  if (msg.has_custom_preset)
-    call.set_preset(msg.custom_preset);
+    call.set_preset(msg.custom_preset.c_str(), msg.custom_preset.size());
  if (msg.has_swing_mode)
    call.set_swing_mode(static_cast<climate::ClimateSwingMode>(msg.swing_mode));
  call.perform();
@@ -742,9 +766,9 @@ uint16_t APIConnection::try_send_number_info(EntityBase *entity, APIConnection *
                                             bool is_single) {
  auto *number = static_cast<number::Number *>(entity);
  ListEntitiesNumberResponse msg;
-  msg.set_unit_of_measurement(number->traits.get_unit_of_measurement_ref());
+  msg.unit_of_measurement = number->traits.get_unit_of_measurement_ref();
  msg.mode = static_cast<enums::NumberMode>(number->traits.get_mode());
-  msg.set_device_class(number->traits.get_device_class_ref());
+  msg.device_class = number->traits.get_device_class_ref();
  msg.min_value = number->traits.get_min_value();
  msg.max_value = number->traits.get_max_value();
  msg.step = number->traits.get_step();
@@ -857,7 +881,7 @@ uint16_t APIConnection::try_send_text_state(EntityBase *entity, APIConnection *c
                                            bool is_single) {
  auto *text = static_cast<text::Text *>(entity);
  TextStateResponse resp;
-  resp.set_state(StringRef(text->state));
+  resp.state = StringRef(text->state);
  resp.missing_state = !text->has_state();
  return fill_and_encode_entity_state(text, resp, TextStateResponse::MESSAGE_TYPE, conn, remaining_size, is_single);
 }
@@ -869,7 +893,7 @@ uint16_t APIConnection::try_send_text_info(EntityBase *entity, APIConnection *co
  msg.mode = static_cast<enums::TextMode>(text->traits.get_mode());
  msg.min_length = text->traits.get_min_length();
  msg.max_length = text->traits.get_max_length();
-  msg.set_pattern(text->traits.get_pattern_ref());
+  msg.pattern = text->traits.get_pattern_ref();
  return fill_and_encode_entity_info(text, msg, ListEntitiesTextResponse::MESSAGE_TYPE, conn, remaining_size,
                                     is_single);
 }
@@ -890,7 +914,7 @@ uint16_t APIConnection::try_send_select_state(EntityBase *entity, APIConnection
                                              bool is_single) {
  auto *select = static_cast<select::Select *>(entity);
  SelectStateResponse resp;
-  resp.set_state(StringRef(select->current_option()));
+  resp.state = StringRef(select->current_option());
  resp.missing_state = !select->has_state();
  return fill_and_encode_entity_state(select, resp, SelectStateResponse::MESSAGE_TYPE, conn, remaining_size, is_single);
 }
@@ -905,7 +929,7 @@ uint16_t APIConnection::try_send_select_info(EntityBase *entity, APIConnection *
 }
 void APIConnection::select_command(const SelectCommandRequest &msg) {
  ENTITY_COMMAND_MAKE_CALL(select::Select, select, select)
-  call.set_option(reinterpret_cast<const char *>(msg.state), msg.state_len);
+  call.set_option(msg.state.c_str(), msg.state.size());
  call.perform();
 }
 #endif
@@ -915,7 +939,7 @@ uint16_t APIConnection::try_send_button_info(EntityBase *entity, APIConnection *
                                             bool is_single) {
  auto *button = static_cast<button::Button *>(entity);
  ListEntitiesButtonResponse msg;
-  msg.set_device_class(button->get_device_class_ref());
+  msg.device_class = button->get_device_class_ref();
  return fill_and_encode_entity_info(button, msg, ListEntitiesButtonResponse::MESSAGE_TYPE, conn, remaining_size,
                                     is_single);
 }
@@ -984,7 +1008,7 @@ uint16_t APIConnection::try_send_valve_info(EntityBase *entity, APIConnection *c
  auto *valve = static_cast<valve::Valve *>(entity);
  ListEntitiesValveResponse msg;
  auto traits = valve->get_traits();
-  msg.set_device_class(valve->get_device_class_ref());
+  msg.device_class = valve->get_device_class_ref();
  msg.assumed_state = traits.get_is_assumed_state();
  msg.supports_position = traits.get_supports_position();
  msg.supports_stop = traits.get_supports_stop();
@@ -1029,7 +1053,7 @@ uint16_t APIConnection::try_send_media_player_info(EntityBase *entity, APIConnec
  for (auto &supported_format : traits.get_supported_formats()) {
    msg.supported_formats.emplace_back();
    auto &media_format = msg.supported_formats.back();
-    media_format.set_format(StringRef(supported_format.format));
+    media_format.format = StringRef(supported_format.format);
    media_format.sample_rate = supported_format.sample_rate;
    media_format.num_channels = supported_format.num_channels;
    media_format.purpose = static_cast<enums::MediaPlayerFormatPurpose>(supported_format.purpose);
@@ -1057,6 +1081,36 @@ void APIConnection::media_player_command(const MediaPlayerCommandRequest &msg) {
 #endif

 #ifdef USE_CAMERA
+void APIConnection::try_send_camera_image_() {
+  if (!this->image_reader_)
+    return;
+
+  // Send as many chunks as possible without blocking
+  while (this->image_reader_->available()) {
+    if (!this->helper_->can_write_without_blocking())
+      return;
+
+    uint32_t to_send = std::min((size_t) MAX_BATCH_PACKET_SIZE, this->image_reader_->available());
+    bool done = this->image_reader_->available() == to_send;
+
+    CameraImageResponse msg;
+    msg.key = camera::Camera::instance()->get_object_id_hash();
+    msg.set_data(this->image_reader_->peek_data_buffer(), to_send);
+    msg.done = done;
+#ifdef USE_DEVICES
+    msg.device_id = camera::Camera::instance()->get_device_id();
+#endif
+
+    if (!this->send_message_(msg, CameraImageResponse::MESSAGE_TYPE)) {
+      return;  // Send failed, try again later
+    }
+    this->image_reader_->consume_data(to_send);
+    if (done) {
+      this->image_reader_->return_image();
+      return;
+    }
+  }
+}
 void APIConnection::set_camera_state(std::shared_ptr<camera::CameraImage> image) {
  if (!this->flags_.state_subscription)
    return;
@@ -1064,8 +1118,11 @@ void APIConnection::set_camera_state(std::shared_ptr<camera::CameraImage> image)
    return;
  if (this->image_reader_->available())
    return;
-  if (image->was_requested_by(esphome::camera::API_REQUESTER) || image->was_requested_by(esphome::camera::IDLE))
+  if (image->was_requested_by(esphome::camera::API_REQUESTER) || image->was_requested_by(esphome::camera::IDLE)) {
    this->image_reader_->set_image(std::move(image));
+    // Try to send immediately to reduce latency
+    this->try_send_camera_image_();
+  }
 }
 uint16_t APIConnection::try_send_camera_info(EntityBase *entity, APIConnection *conn, uint32_t remaining_size,
                                             bool is_single) {
@@ -1094,9 +1151,8 @@ void APIConnection::on_get_time_response(const GetTimeResponse &value) {
  if (homeassistant::global_homeassistant_time != nullptr) {
    homeassistant::global_homeassistant_time->set_epoch_time(value.epoch_seconds);
 #ifdef USE_TIME_TIMEZONE
-    if (value.timezone_len > 0) {
-      homeassistant::global_homeassistant_time->set_timezone(reinterpret_cast<const char *>(value.timezone),
-                                                             value.timezone_len);
+    if (!value.timezone.empty()) {
+      homeassistant::global_homeassistant_time->set_timezone(value.timezone.c_str(), value.timezone.size());
    }
 #endif
  }
@@ -1207,8 +1263,8 @@ bool APIConnection::send_voice_assistant_get_configuration_response(const VoiceA
  for (auto &wake_word : config.available_wake_words) {
    resp.available_wake_words.emplace_back();
    auto &resp_wake_word = resp.available_wake_words.back();
-    resp_wake_word.set_id(StringRef(wake_word.id));
-    resp_wake_word.set_wake_word(StringRef(wake_word.wake_word));
+    resp_wake_word.id = StringRef(wake_word.id);
+    resp_wake_word.wake_word = StringRef(wake_word.wake_word);
    for (const auto &lang : wake_word.trained_languages) {
      resp_wake_word.trained_languages.push_back(lang);
    }
@@ -1223,8 +1279,8 @@ bool APIConnection::send_voice_assistant_get_configuration_response(const VoiceA

    resp.available_wake_words.emplace_back();
    auto &resp_wake_word = resp.available_wake_words.back();
-    resp_wake_word.set_id(StringRef(wake_word.id));
-    resp_wake_word.set_wake_word(StringRef(wake_word.wake_word));
+    resp_wake_word.id = StringRef(wake_word.id);
+    resp_wake_word.wake_word = StringRef(wake_word.wake_word);
    for (const auto &lang : wake_word.trained_languages) {
      resp_wake_word.trained_languages.push_back(lang);
    }
@@ -1306,6 +1362,57 @@ void APIConnection::alarm_control_panel_command(const AlarmControlPanelCommandRe
 }
 #endif

+#ifdef USE_WATER_HEATER
+bool APIConnection::send_water_heater_state(water_heater::WaterHeater *water_heater) {
+  return this->send_message_smart_(water_heater, &APIConnection::try_send_water_heater_state,
+                                   WaterHeaterStateResponse::MESSAGE_TYPE, WaterHeaterStateResponse::ESTIMATED_SIZE);
+}
+uint16_t APIConnection::try_send_water_heater_state(EntityBase *entity, APIConnection *conn, uint32_t remaining_size,
+                                                    bool is_single) {
+  auto *wh = static_cast<water_heater::WaterHeater *>(entity);
+  WaterHeaterStateResponse resp;
+  resp.mode = static_cast<enums::WaterHeaterMode>(wh->get_mode());
+  resp.current_temperature = wh->get_current_temperature();
+  resp.target_temperature = wh->get_target_temperature();
+  resp.target_temperature_low = wh->get_target_temperature_low();
+  resp.target_temperature_high = wh->get_target_temperature_high();
+  resp.state = wh->get_state();
+  resp.key = wh->get_object_id_hash();
+
+  return encode_message_to_buffer(resp, WaterHeaterStateResponse::MESSAGE_TYPE, conn, remaining_size, is_single);
+}
+uint16_t APIConnection::try_send_water_heater_info(EntityBase *entity, APIConnection *conn, uint32_t remaining_size,
+                                                   bool is_single) {
+  auto *wh = static_cast<water_heater::WaterHeater *>(entity);
+  ListEntitiesWaterHeaterResponse msg;
+  auto traits = wh->get_traits();
+  msg.min_temperature = traits.get_min_temperature();
+  msg.max_temperature = traits.get_max_temperature();
+  msg.target_temperature_step = traits.get_target_temperature_step();
+  msg.supported_modes = &traits.get_supported_modes();
+  msg.supported_features = traits.get_feature_flags();
+  return fill_and_encode_entity_info(wh, msg, ListEntitiesWaterHeaterResponse::MESSAGE_TYPE, conn, remaining_size,
+                                     is_single);
+}
+
+void APIConnection::on_water_heater_command_request(const WaterHeaterCommandRequest &msg) {
+  ENTITY_COMMAND_MAKE_CALL(water_heater::WaterHeater, water_heater, water_heater)
+  if (msg.has_fields & enums::WATER_HEATER_COMMAND_HAS_MODE)
+    call.set_mode(static_cast<water_heater::WaterHeaterMode>(msg.mode));
+  if (msg.has_fields & enums::WATER_HEATER_COMMAND_HAS_TARGET_TEMPERATURE)
+    call.set_target_temperature(msg.target_temperature);
+  if (msg.has_fields & enums::WATER_HEATER_COMMAND_HAS_TARGET_TEMPERATURE_LOW)
+    call.set_target_temperature_low(msg.target_temperature_low);
+  if (msg.has_fields & enums::WATER_HEATER_COMMAND_HAS_TARGET_TEMPERATURE_HIGH)
+    call.set_target_temperature_high(msg.target_temperature_high);
+  if (msg.has_fields & enums::WATER_HEATER_COMMAND_HAS_STATE) {
+    call.set_away((msg.state & water_heater::WATER_HEATER_STATE_AWAY) != 0);
+    call.set_on((msg.state & water_heater::WATER_HEATER_STATE_ON) != 0);
+  }
+  call.perform();
+}
+#endif
+
 #ifdef USE_EVENT
 void APIConnection::send_event(event::Event *event, const char *event_type) {
  this->send_message_smart_(event, MessageCreator(event_type), EventResponse::MESSAGE_TYPE,
@@ -1314,7 +1421,7 @@ void APIConnection::send_event(event::Event *event, const char *event_type) {
 uint16_t APIConnection::try_send_event_response(event::Event *event, const char *event_type, APIConnection *conn,
                                                uint32_t remaining_size, bool is_single) {
  EventResponse resp;
-  resp.set_event_type(StringRef(event_type));
+  resp.event_type = StringRef(event_type);
  return fill_and_encode_entity_state(event, resp, EventResponse::MESSAGE_TYPE, conn, remaining_size, is_single);
 }

@@ -1322,7 +1429,7 @@ uint16_t APIConnection::try_send_event_info(EntityBase *entity, APIConnection *c
                                            bool is_single) {
  auto *event = static_cast<event::Event *>(entity);
  ListEntitiesEventResponse msg;
-  msg.set_device_class(event->get_device_class_ref());
+  msg.device_class = event->get_device_class_ref();
  msg.event_types = &event->get_event_types();
  return fill_and_encode_entity_info(event, msg, ListEntitiesEventResponse::MESSAGE_TYPE, conn, remaining_size,
                                     is_single);
@@ -1345,11 +1452,11 @@ uint16_t APIConnection::try_send_update_state(EntityBase *entity, APIConnection
      resp.has_progress = true;
      resp.progress = update->update_info.progress;
    }
-    resp.set_current_version(StringRef(update->update_info.current_version));
-    resp.set_latest_version(StringRef(update->update_info.latest_version));
-    resp.set_title(StringRef(update->update_info.title));
-    resp.set_release_summary(StringRef(update->update_info.summary));
-    resp.set_release_url(StringRef(update->update_info.release_url));
+    resp.current_version = StringRef(update->update_info.current_version);
+    resp.latest_version = StringRef(update->update_info.latest_version);
+    resp.title = StringRef(update->update_info.title);
+    resp.release_summary = StringRef(update->update_info.summary);
+    resp.release_url = StringRef(update->update_info.release_url);
  }
  return fill_and_encode_entity_state(update, resp, UpdateStateResponse::MESSAGE_TYPE, conn, remaining_size, is_single);
 }
@@ -1357,7 +1464,7 @@ uint16_t APIConnection::try_send_update_info(EntityBase *entity, APIConnection *
                                             bool is_single) {
  auto *update = static_cast<update::UpdateEntity *>(entity);
  ListEntitiesUpdateResponse msg;
-  msg.set_device_class(update->get_device_class_ref());
+  msg.device_class = update->get_device_class_ref();
  return fill_and_encode_entity_info(update, msg, ListEntitiesUpdateResponse::MESSAGE_TYPE, conn, remaining_size,
                                     is_single);
 }
@@ -1395,9 +1502,10 @@ void APIConnection::complete_authentication_() {
  }

  this->flags_.connection_state = static_cast<uint8_t>(ConnectionState::AUTHENTICATED);
-  ESP_LOGD(TAG, "%s (%s) connected", this->client_info_.name.c_str(), this->client_info_.peername.c_str());
+  this->log_client_(ESPHOME_LOG_LEVEL_DEBUG, LOG_STR("connected"));
 #ifdef USE_API_CLIENT_CONNECTED_TRIGGER
-  this->parent_->get_client_connected_trigger()->trigger(this->client_info_.name, this->client_info_.peername);
+  this->parent_->get_client_connected_trigger()->trigger(std::string(this->helper_->get_client_name()),
+                                                         std::string(this->helper_->get_client_peername()));
 #endif
 #ifdef USE_HOMEASSISTANT_TIME
  if (homeassistant::global_homeassistant_time != nullptr) {
@@ -1412,41 +1520,25 @@ void APIConnection::complete_authentication_() {
 }

 bool APIConnection::send_hello_response(const HelloRequest &msg) {
-  this->client_info_.name.assign(reinterpret_cast<const char *>(msg.client_info), msg.client_info_len);
-  this->client_info_.peername = this->helper_->getpeername();
+  // Copy client name with truncation if needed (set_client_name handles truncation)
+  this->helper_->set_client_name(msg.client_info.c_str(), msg.client_info.size());
  this->client_api_version_major_ = msg.api_version_major;
  this->client_api_version_minor_ = msg.api_version_minor;
-  ESP_LOGV(TAG, "Hello from client: '%s' | %s | API Version %" PRIu32 ".%" PRIu32, this->client_info_.name.c_str(),
-           this->client_info_.peername.c_str(), this->client_api_version_major_, this->client_api_version_minor_);
+  ESP_LOGV(TAG, "Hello from client: '%s' | %s | API Version %" PRIu32 ".%" PRIu32, this->helper_->get_client_name(),
+           this->helper_->get_client_peername(), this->client_api_version_major_, this->client_api_version_minor_);

  HelloResponse resp;
  resp.api_version_major = 1;
-  resp.api_version_minor = 13;
+  resp.api_version_minor = 14;
  // Send only the version string - the client only logs this for debugging and doesn't use it otherwise
-  resp.set_server_info(ESPHOME_VERSION_REF);
-  resp.set_name(StringRef(App.get_name()));
+  resp.server_info = ESPHOME_VERSION_REF;
+  resp.name = StringRef(App.get_name());

-#ifdef USE_API_PASSWORD
-  // Password required - wait for authentication
-  this->flags_.connection_state = static_cast<uint8_t>(ConnectionState::CONNECTED);
-#else
-  // No password configured - auto-authenticate
+  // Auto-authenticate - password auth was removed in ESPHome 2026.1.0
  this->complete_authentication_();
-#endif

  return this->send_message(resp, HelloResponse::MESSAGE_TYPE);
 }
-#ifdef USE_API_PASSWORD
-bool APIConnection::send_authenticate_response(const AuthenticationRequest &msg) {
-  AuthenticationResponse resp;
-  // bool invalid_password = 1;
-  resp.invalid_password = !this->parent_->check_password(msg.password, msg.password_len);
-  if (!resp.invalid_password) {
-    this->complete_authentication_();
-  }
-  return this->send_message(resp, AuthenticationResponse::MESSAGE_TYPE);
-}
-#endif  // USE_API_PASSWORD

 bool APIConnection::send_ping_response(const PingRequest &msg) {
  PingResponse resp;
@@ -1455,24 +1547,24 @@ bool APIConnection::send_ping_response(const PingRequest &msg) {

 bool APIConnection::send_device_info_response(const DeviceInfoRequest &msg) {
  DeviceInfoResponse resp{};
-#ifdef USE_API_PASSWORD
-  resp.uses_password = true;
-#endif
-  resp.set_name(StringRef(App.get_name()));
-  resp.set_friendly_name(StringRef(App.get_friendly_name()));
+  resp.name = StringRef(App.get_name());
+  resp.friendly_name = StringRef(App.get_friendly_name());
 #ifdef USE_AREAS
-  resp.set_suggested_area(StringRef(App.get_area()));
+  resp.suggested_area = StringRef(App.get_area());
 #endif
  // Stack buffer for MAC address (XX:XX:XX:XX:XX:XX\0 = 18 bytes)
  char mac_address[18];
  uint8_t mac[6];
  get_mac_address_raw(mac);
  format_mac_addr_upper(mac, mac_address);
-  resp.set_mac_address(StringRef(mac_address));
+  resp.mac_address = StringRef(mac_address);

-  resp.set_esphome_version(ESPHOME_VERSION_REF);
+  resp.esphome_version = ESPHOME_VERSION_REF;

-  resp.set_compilation_time(App.get_compilation_time_ref());
+  // Stack buffer for build time string
+  char build_time_str[Application::BUILD_TIME_STR_SIZE];
+  App.get_build_time_string(build_time_str);
+  resp.compilation_time = StringRef(build_time_str);

  // Manufacturer string - define once, handle ESP8266 PROGMEM separately
 #if defined(USE_ESP8266) || defined(USE_ESP32)
@@ -1496,10 +1588,10 @@ bool APIConnection::send_device_info_response(const DeviceInfoRequest &msg) {
  static const char MANUFACTURER_PROGMEM[] PROGMEM = ESPHOME_MANUFACTURER;
  char manufacturer_buf[sizeof(MANUFACTURER_PROGMEM)];
  memcpy_P(manufacturer_buf, MANUFACTURER_PROGMEM, sizeof(MANUFACTURER_PROGMEM));
-  resp.set_manufacturer(StringRef(manufacturer_buf, sizeof(MANUFACTURER_PROGMEM) - 1));
+  resp.manufacturer = StringRef(manufacturer_buf, sizeof(MANUFACTURER_PROGMEM) - 1);
 #else
  static constexpr auto MANUFACTURER = StringRef::from_lit(ESPHOME_MANUFACTURER);
-  resp.set_manufacturer(MANUFACTURER);
+  resp.manufacturer = MANUFACTURER;
 #endif
 #undef ESPHOME_MANUFACTURER

@@ -1507,10 +1599,10 @@ bool APIConnection::send_device_info_response(const DeviceInfoRequest &msg) {
  static const char MODEL_PROGMEM[] PROGMEM = ESPHOME_BOARD;
  char model_buf[sizeof(MODEL_PROGMEM)];
  memcpy_P(model_buf, MODEL_PROGMEM, sizeof(MODEL_PROGMEM));
-  resp.set_model(StringRef(model_buf, sizeof(MODEL_PROGMEM) - 1));
+  resp.model = StringRef(model_buf, sizeof(MODEL_PROGMEM) - 1);
 #else
  static constexpr auto MODEL = StringRef::from_lit(ESPHOME_BOARD);
-  resp.set_model(MODEL);
+  resp.model = MODEL;
 #endif
 #ifdef USE_DEEP_SLEEP
  resp.has_deep_sleep = deep_sleep::global_has_deep_sleep;
@@ -1523,13 +1615,13 @@ bool APIConnection::send_device_info_response(const DeviceInfoRequest &msg) {
  char project_version_buf[sizeof(PROJECT_VERSION_PROGMEM)];
  memcpy_P(project_name_buf, PROJECT_NAME_PROGMEM, sizeof(PROJECT_NAME_PROGMEM));
  memcpy_P(project_version_buf, PROJECT_VERSION_PROGMEM, sizeof(PROJECT_VERSION_PROGMEM));
-  resp.set_project_name(StringRef(project_name_buf, sizeof(PROJECT_NAME_PROGMEM) - 1));
-  resp.set_project_version(StringRef(project_version_buf, sizeof(PROJECT_VERSION_PROGMEM) - 1));
+  resp.project_name = StringRef(project_name_buf, sizeof(PROJECT_NAME_PROGMEM) - 1);
+  resp.project_version = StringRef(project_version_buf, sizeof(PROJECT_VERSION_PROGMEM) - 1);
 #else
  static constexpr auto PROJECT_NAME = StringRef::from_lit(ESPHOME_PROJECT_NAME);
  static constexpr auto PROJECT_VERSION = StringRef::from_lit(ESPHOME_PROJECT_VERSION);
-  resp.set_project_name(PROJECT_NAME);
-  resp.set_project_version(PROJECT_VERSION);
+  resp.project_name = PROJECT_NAME;
+  resp.project_version = PROJECT_VERSION;
 #endif
 #endif
 #ifdef USE_WEBSERVER
@@ -1540,7 +1632,7 @@ bool APIConnection::send_device_info_response(const DeviceInfoRequest &msg) {
  // Stack buffer for Bluetooth MAC address (XX:XX:XX:XX:XX:XX\0 = 18 bytes)
  char bluetooth_mac[18];
  bluetooth_proxy::global_bluetooth_proxy->get_bluetooth_mac_address_pretty(bluetooth_mac);
-  resp.set_bluetooth_mac_address(StringRef(bluetooth_mac));
+  resp.bluetooth_mac_address = StringRef(bluetooth_mac);
 #endif
 #ifdef USE_VOICE_ASSISTANT
  resp.voice_assistant_feature_flags = voice_assistant::global_voice_assistant->get_feature_flags();
@@ -1559,7 +1651,7 @@ bool APIConnection::send_device_info_response(const DeviceInfoRequest &msg) {
      break;
    auto &device_info = resp.devices[device_index++];
    device_info.device_id = device->get_device_id();
-    device_info.set_name(StringRef(device->get_name()));
+    device_info.name = StringRef(device->get_name());
    device_info.area_id = device->get_area_id();
  }
 #endif
@@ -1570,7 +1662,7 @@ bool APIConnection::send_device_info_response(const DeviceInfoRequest &msg) {
      break;
    auto &area_info = resp.areas[area_index++];
    area_info.area_id = area->get_area_id();
-    area_info.set_name(StringRef(area->get_name()));
+    area_info.name = StringRef(area->get_name());
  }
 #endif

@@ -1579,15 +1671,38 @@ bool APIConnection::send_device_info_response(const DeviceInfoRequest &msg) {

 #ifdef USE_API_HOMEASSISTANT_STATES
 void APIConnection::on_home_assistant_state_response(const HomeAssistantStateResponse &msg) {
-  for (auto &it : this->parent_->get_state_subs()) {
-    // Compare entity_id and attribute with message fields
-    bool entity_match = (strcmp(it.entity_id, msg.entity_id.c_str()) == 0);
-    bool attribute_match = (it.attribute != nullptr && strcmp(it.attribute, msg.attribute.c_str()) == 0) ||
-                           (it.attribute == nullptr && msg.attribute.empty());
+  // Skip if entity_id is empty (invalid message)
+  if (msg.entity_id.empty()) {
+    return;
+  }

-    if (entity_match && attribute_match) {
-      it.callback(msg.state);
+  for (auto &it : this->parent_->get_state_subs()) {
+    // Compare entity_id: check length matches and content matches
+    size_t entity_id_len = strlen(it.entity_id);
+    if (entity_id_len != msg.entity_id.size() ||
+        memcmp(it.entity_id, msg.entity_id.c_str(), msg.entity_id.size()) != 0) {
+      continue;
    }
+
+    // Compare attribute: either both have matching attribute, or both have none
+    size_t sub_attr_len = it.attribute != nullptr ? strlen(it.attribute) : 0;
+    if (sub_attr_len != msg.attribute.size() ||
+        (sub_attr_len > 0 && memcmp(it.attribute, msg.attribute.c_str(), sub_attr_len) != 0)) {
+      continue;
+    }
+
+    // Create null-terminated state for callback (parse_number needs null-termination)
+    // HA state max length is 255, so 256 byte buffer covers all cases
+    char state_buf[256];
+    size_t copy_len = msg.state.size();
+    if (copy_len >= sizeof(state_buf)) {
+      copy_len = sizeof(state_buf) - 1;  // Truncate to leave space for null terminator
+    }
+    if (copy_len > 0) {
+      memcpy(state_buf, msg.state.c_str(), copy_len);
+    }
+    state_buf[copy_len] = '\0';
+    it.callback(StringRef(state_buf, copy_len));
  }
 }
 #endif
@@ -1622,20 +1737,20 @@ void APIConnection::execute_service(const ExecuteServiceRequest &msg) {
  // the action list. This ensures async actions (delays, waits) complete first.
 }
 #ifdef USE_API_USER_DEFINED_ACTION_RESPONSES
-void APIConnection::send_execute_service_response(uint32_t call_id, bool success, const std::string &error_message) {
+void APIConnection::send_execute_service_response(uint32_t call_id, bool success, StringRef error_message) {
  ExecuteServiceResponse resp;
  resp.call_id = call_id;
  resp.success = success;
-  resp.set_error_message(StringRef(error_message));
+  resp.error_message = error_message;
  this->send_message(resp, ExecuteServiceResponse::MESSAGE_TYPE);
 }
 #ifdef USE_API_USER_DEFINED_ACTION_RESPONSES_JSON
-void APIConnection::send_execute_service_response(uint32_t call_id, bool success, const std::string &error_message,
+void APIConnection::send_execute_service_response(uint32_t call_id, bool success, StringRef error_message,
                                                  const uint8_t *response_data, size_t response_data_len) {
  ExecuteServiceResponse resp;
  resp.call_id = call_id;
  resp.success = success;
-  resp.set_error_message(StringRef(error_message));
+  resp.error_message = error_message;
  resp.response_data = response_data;
  resp.response_data_len = response_data_len;
  this->send_message(resp, ExecuteServiceResponse::MESSAGE_TYPE);
@@ -1663,13 +1778,13 @@ bool APIConnection::send_noise_encryption_set_key_response(const NoiseEncryption
  resp.success = false;

  psk_t psk{};
-  if (msg.key.empty()) {
+  if (msg.key_len == 0) {
    if (this->parent_->clear_noise_psk(true)) {
      resp.success = true;
    } else {
      ESP_LOGW(TAG, "Failed to clear encryption key");
    }
-  } else if (base64_decode(msg.key, psk.data(), psk.size()) != psk.size()) {
+  } else if (base64_decode(msg.key, msg.key_len, psk.data(), psk.size()) != psk.size()) {
    ESP_LOGW(TAG, "Invalid encryption key length");
  } else if (!this->parent_->save_noise_psk(psk, true)) {
    ESP_LOGW(TAG, "Failed to save encryption key");
@@ -1704,10 +1819,30 @@ bool APIConnection::try_to_clear_buffer(bool log_out_of_space) {
  return false;
 }
 bool APIConnection::send_buffer(ProtoWriteBuffer buffer, uint8_t message_type) {
-  if (!this->try_to_clear_buffer(message_type != SubscribeLogsResponse::MESSAGE_TYPE)) {  // SubscribeLogsResponse
+  const bool is_log_message = (message_type == SubscribeLogsResponse::MESSAGE_TYPE);
+
+  if (!this->try_to_clear_buffer(!is_log_message)) {
    return false;
  }

+  // Toggle Nagle's algorithm based on message type to prevent log messages from
+  // filling the TCP send buffer and crowding out important state updates.
+  //
+  // This honors the `no_delay` proto option - SubscribeLogsResponse is the only
+  // message with `option (no_delay) = false;` in api.proto, indicating it should
+  // allow Nagle coalescing. This option existed since 2019 but was never implemented.
+  //
+  // - Log messages: Enable Nagle (NODELAY=false) so small log packets coalesce
+  //   into fewer, larger packets. They flush naturally via TCP delayed ACK timer
+  //   (~200ms), buffer filling, or when a state update triggers a flush.
+  //
+  // - All other messages (state updates, responses): Disable Nagle (NODELAY=true)
+  //   for immediate delivery. These are time-sensitive and should not be delayed.
+  //
+  // This must be done proactively BEFORE the buffer fills up - checking buffer
+  // state here would be too late since we'd already be in a degraded state.
+  this->helper_->set_nodelay(!is_log_message);
+
  APIError err = this->helper_->write_protobuf_packet(message_type, buffer);
  if (err == APIError::WOULD_BLOCK)
    return false;
@@ -1718,15 +1853,9 @@ bool APIConnection::send_buffer(ProtoWriteBuffer buffer, uint8_t message_type) {
  // Do not set last_traffic_ on send
  return true;
 }
-#ifdef USE_API_PASSWORD
-void APIConnection::on_unauthenticated_access() {
-  this->on_fatal_error();
-  ESP_LOGD(TAG, "%s (%s) no authentication", this->client_info_.name.c_str(), this->client_info_.peername.c_str());
-}
-#endif
 void APIConnection::on_no_setup_connection() {
  this->on_fatal_error();
-  ESP_LOGD(TAG, "%s (%s) no connection setup", this->client_info_.name.c_str(), this->client_info_.peername.c_str());
+  this->log_client_(ESPHOME_LOG_LEVEL_DEBUG, LOG_STR("no connection setup"));
 }
 void APIConnection::on_fatal_error() {
  this->helper_->close();
@@ -1772,9 +1901,9 @@ bool APIConnection::schedule_batch_() {
 }

 void APIConnection::process_batch_() {
-  // Ensure PacketInfo remains trivially destructible for our placement new approach
-  static_assert(std::is_trivially_destructible<PacketInfo>::value,
-                "PacketInfo must remain trivially destructible with this placement-new approach");
+  // Ensure MessageInfo remains trivially destructible for our placement new approach
+  static_assert(std::is_trivially_destructible<MessageInfo>::value,
+                "MessageInfo must remain trivially destructible with this placement-new approach");

  if (this->deferred_batch_.empty()) {
    this->flags_.batch_scheduled = false;
@@ -1814,12 +1943,12 @@ void APIConnection::process_batch_() {
    return;
  }

-  size_t packets_to_process = std::min(num_items, MAX_PACKETS_PER_BATCH);
+  size_t messages_to_process = std::min(num_items, MAX_MESSAGES_PER_BATCH);

-  // Stack-allocated array for packet info
-  alignas(PacketInfo) char packet_info_storage[MAX_PACKETS_PER_BATCH * sizeof(PacketInfo)];
-  PacketInfo *packet_info = reinterpret_cast<PacketInfo *>(packet_info_storage);
-  size_t packet_count = 0;
+  // Stack-allocated array for message info
+  alignas(MessageInfo) char message_info_storage[MAX_MESSAGES_PER_BATCH * sizeof(MessageInfo)];
+  MessageInfo *message_info = reinterpret_cast<MessageInfo *>(message_info_storage);
+  size_t message_count = 0;

  // Cache these values to avoid repeated virtual calls
  const uint8_t header_padding = this->helper_->frame_header_padding();
@@ -1850,7 +1979,7 @@ void APIConnection::process_batch_() {
  uint32_t current_offset = 0;

  // Process items and encode directly to buffer (up to our limit)
-  for (size_t i = 0; i < packets_to_process; i++) {
+  for (size_t i = 0; i < messages_to_process; i++) {
    const auto &item = this->deferred_batch_[i];
    // Try to encode message
    // The creator will calculate overhead to determine if the message fits
@@ -1864,11 +1993,11 @@ void APIConnection::process_batch_() {
    // Message was encoded successfully
    // payload_size is header_padding + actual payload size + footer_size
    uint16_t proto_payload_size = payload_size - header_padding - footer_size;
-    // Use placement new to construct PacketInfo in pre-allocated stack array
-    // This avoids default-constructing all MAX_PACKETS_PER_BATCH elements
-    // Explicit destruction is not needed because PacketInfo is trivially destructible,
+    // Use placement new to construct MessageInfo in pre-allocated stack array
+    // This avoids default-constructing all MAX_MESSAGES_PER_BATCH elements
+    // Explicit destruction is not needed because MessageInfo is trivially destructible,
    // as ensured by the static_assert in its definition.
-    new (&packet_info[packet_count++]) PacketInfo(item.message_type, current_offset, proto_payload_size);
+    new (&message_info[message_count++]) MessageInfo(item.message_type, current_offset, proto_payload_size);

    // Update tracking variables
    items_processed++;
@@ -1892,9 +2021,9 @@ void APIConnection::process_batch_() {
    shared_buf.resize(shared_buf.size() + footer_size);
  }

-  // Send all collected packets
-  APIError err = this->helper_->write_protobuf_packets(ProtoWriteBuffer{&shared_buf},
-                                                       std::span<const PacketInfo>(packet_info, packet_count));
+  // Send all collected messages
+  APIError err = this->helper_->write_protobuf_messages(ProtoWriteBuffer{&shared_buf},
+                                                        std::span<const MessageInfo>(message_info, message_count));
  if (err != APIError::OK && err != APIError::WOULD_BLOCK) {
    this->fatal_error_with_log_(LOG_STR("Batch write failed"), err);
  }
@@ -1962,10 +2091,10 @@ void APIConnection::process_state_subscriptions_() {

  const auto &it = subs[this->state_subs_at_];
  SubscribeHomeAssistantStateResponse resp;
-  resp.set_entity_id(StringRef(it.entity_id));
+  resp.entity_id = StringRef(it.entity_id);

  // Avoid string copy by using the const char* pointer if it exists
-  resp.set_attribute(it.attribute != nullptr ? StringRef(it.attribute) : StringRef(""));
+  resp.attribute = it.attribute != nullptr ? StringRef(it.attribute) : StringRef("");

  resp.once = it.once;
  if (this->send_message(resp, SubscribeHomeAssistantStateResponse::MESSAGE_TYPE)) {
@@ -1974,8 +2103,13 @@ void APIConnection::process_state_subscriptions_() {
 }
 #endif  // USE_API_HOMEASSISTANT_STATES

+void APIConnection::log_client_(int level, const LogString *message) {
+  esp_log_printf_(level, TAG, __LINE__, ESPHOME_LOG_FORMAT("%s (%s): %s"), this->helper_->get_client_name(),
+                  this->helper_->get_client_peername(), LOG_STR_ARG(message));
+}
+
 void APIConnection::log_warning_(const LogString *message, APIError err) {
-  ESP_LOGW(TAG, "%s (%s): %s %s errno=%d", this->client_info_.name.c_str(), this->client_info_.peername.c_str(),
+  ESP_LOGW(TAG, "%s (%s): %s %s errno=%d", this->helper_->get_client_name(), this->helper_->get_client_peername(),
           LOG_STR_ARG(message), LOG_STR_ARG(api_error_to_logstr(err)), errno);
 }

--- a/esphome/components/api/api_connection.h
+++ b/esphome/components/api/api_connection.h
@@ -9,32 +9,23 @@
 #include "esphome/core/application.h"
 #include "esphome/core/component.h"
 #include "esphome/core/entity_base.h"
+#include "esphome/core/string_ref.h"

 #include <functional>
 #include <vector>

 namespace esphome::api {

-// Client information structure
-struct ClientInfo {
-  std::string name;      // Client name from Hello message
-  std::string peername;  // IP:port from socket
-};
-
 // Keepalive timeout in milliseconds
 static constexpr uint32_t KEEPALIVE_TIMEOUT_MS = 60000;
 // Maximum number of entities to process in a single batch during initial state/info sending
-// This was increased from 20 to 24 after removing the unique_id field from entity info messages,
-// which reduced message sizes allowing more entities per batch without exceeding packet limits
-static constexpr size_t MAX_INITIAL_PER_BATCH = 24;
-// Maximum number of packets to process in a single batch (platform-dependent)
-// This limit exists to prevent stack overflow from the PacketInfo array in process_batch_
-// Each PacketInfo is 8 bytes, so 64 * 8 = 512 bytes, 32 * 8 = 256 bytes
-#if defined(USE_ESP32) || defined(USE_HOST)
-static constexpr size_t MAX_PACKETS_PER_BATCH = 64;  // ESP32 has 8KB+ stack, HOST has plenty
-#else
-static constexpr size_t MAX_PACKETS_PER_BATCH = 32;  // ESP8266/RP2040/etc have smaller stacks
-#endif
+// API 1.14+ clients compute object_id client-side, so messages are smaller and we can fit more per batch
+// TODO: Remove MAX_INITIAL_PER_BATCH_LEGACY before 2026.7.0 - all clients should support API 1.14 by then
+static constexpr size_t MAX_INITIAL_PER_BATCH_LEGACY = 24;  // For clients < API 1.14 (includes object_id)
+static constexpr size_t MAX_INITIAL_PER_BATCH = 34;         // For clients >= API 1.14 (no object_id)
+// Verify MAX_MESSAGES_PER_BATCH (defined in api_frame_helper.h) can hold the initial batch
+static_assert(MAX_MESSAGES_PER_BATCH >= MAX_INITIAL_PER_BATCH,
+              "MAX_MESSAGES_PER_BATCH must be >= MAX_INITIAL_PER_BATCH");

 class APIConnection final : public APIServerConnection {
 public:
@@ -176,6 +167,11 @@ class APIConnection final : public APIServerConnection {
  void alarm_control_panel_command(const AlarmControlPanelCommandRequest &msg) override;
 #endif

+#ifdef USE_WATER_HEATER
+  bool send_water_heater_state(water_heater::WaterHeater *water_heater);
+  void on_water_heater_command_request(const WaterHeaterCommandRequest &msg) override;
+#endif
+
 #ifdef USE_EVENT
  void send_event(event::Event *event, const char *event_type);
 #endif
@@ -197,16 +193,17 @@ class APIConnection final : public APIServerConnection {
  void on_get_time_response(const GetTimeResponse &value) override;
 #endif
  bool send_hello_response(const HelloRequest &msg) override;
-#ifdef USE_API_PASSWORD
-  bool send_authenticate_response(const AuthenticationRequest &msg) override;
-#endif
  bool send_disconnect_response(const DisconnectRequest &msg) override;
  bool send_ping_response(const PingRequest &msg) override;
  bool send_device_info_response(const DeviceInfoRequest &msg) override;
-  void list_entities(const ListEntitiesRequest &msg) override { this->list_entities_iterator_.begin(); }
+  void list_entities(const ListEntitiesRequest &msg) override { this->begin_iterator_(ActiveIterator::LIST_ENTITIES); }
  void subscribe_states(const SubscribeStatesRequest &msg) override {
    this->flags_.state_subscription = true;
-    this->initial_state_iterator_.begin();
+    // Start initial state iterator only if no iterator is active
+    // If list_entities is running, we'll start initial_state when it completes
+    if (this->active_iterator_ == ActiveIterator::NONE) {
+      this->begin_iterator_(ActiveIterator::INITIAL_STATE);
+    }
  }
  void subscribe_logs(const SubscribeLogsRequest &msg) override {
    this->flags_.log_subscription = msg.level;
@@ -224,9 +221,9 @@ class APIConnection final : public APIServerConnection {
 #ifdef USE_API_USER_DEFINED_ACTIONS
  void execute_service(const ExecuteServiceRequest &msg) override;
 #ifdef USE_API_USER_DEFINED_ACTION_RESPONSES
-  void send_execute_service_response(uint32_t call_id, bool success, const std::string &error_message);
+  void send_execute_service_response(uint32_t call_id, bool success, StringRef error_message);
 #ifdef USE_API_USER_DEFINED_ACTION_RESPONSES_JSON
-  void send_execute_service_response(uint32_t call_id, bool success, const std::string &error_message,
+  void send_execute_service_response(uint32_t call_id, bool success, StringRef error_message,
                                     const uint8_t *response_data, size_t response_data_len);
 #endif  // USE_API_USER_DEFINED_ACTION_RESPONSES_JSON
 #endif  // USE_API_USER_DEFINED_ACTION_RESPONSES
@@ -251,9 +248,6 @@ class APIConnection final : public APIServerConnection {
  }

  void on_fatal_error() override;
-#ifdef USE_API_PASSWORD
-  void on_unauthenticated_access() override;
-#endif
  void on_no_setup_connection() override;
  ProtoWriteBuffer create_buffer(uint32_t reserve_size) override {
    // FIXME: ensure no recursive writes can happen
@@ -280,13 +274,18 @@ class APIConnection final : public APIServerConnection {
  bool try_to_clear_buffer(bool log_out_of_space);
  bool send_buffer(ProtoWriteBuffer buffer, uint8_t message_type) override;

-  const std::string &get_name() const { return this->client_info_.name; }
-  const std::string &get_peername() const { return this->client_info_.peername; }
+  const char *get_name() const { return this->helper_->get_client_name(); }
+  /// Get peer name (IP address) - cached at connection init time
+  const char *get_peername() const { return this->helper_->get_client_peername(); }

 protected:
  // Helper function to handle authentication completion
  void complete_authentication_();

+#ifdef USE_CAMERA
+  void try_send_camera_image_();
+#endif
+
 #ifdef USE_API_HOMEASSISTANT_STATES
  void process_state_subscriptions_();
 #endif
@@ -310,25 +309,24 @@ class APIConnection final : public APIServerConnection {
                                              APIConnection *conn, uint32_t remaining_size, bool is_single) {
    // Set common fields that are shared by all entity types
    msg.key = entity->get_object_id_hash();
-    // Try to use static reference first to avoid allocation
-    StringRef static_ref = entity->get_object_id_ref_for_api_();
-    // Store dynamic string outside the if-else to maintain lifetime
-    std::string object_id;
-    if (!static_ref.empty()) {
-      msg.set_object_id(static_ref);
-    } else {
-      // Dynamic case - need to allocate
-      object_id = entity->get_object_id();
-      msg.set_object_id(StringRef(object_id));
+
+    // API 1.14+ clients compute object_id client-side from the entity name
+    // For older clients, we must send object_id for backward compatibility
+    // See: https://github.com/esphome/backlog/issues/76
+    // TODO: Remove this backward compat code before 2026.7.0 - all clients should support API 1.14 by then
+    // Buffer must remain in scope until encode_message_to_buffer is called
+    char object_id_buf[OBJECT_ID_MAX_LEN];
+    if (!conn->client_supports_api_version(1, 14)) {
+      msg.object_id = entity->get_object_id_to(object_id_buf);
    }

    if (entity->has_own_name()) {
-      msg.set_name(entity->get_name());
+      msg.name = entity->get_name();
    }

    // Set common EntityBase properties
 #ifdef USE_ENTITY_ICON
-    msg.set_icon(entity->get_icon_ref());
+    msg.icon = entity->get_icon_ref();
 #endif
    msg.disabled_by_default = entity->is_disabled_by_default();
    msg.entity_category = static_cast<enums::EntityCategory>(entity->get_entity_category());
@@ -343,16 +341,24 @@ class APIConnection final : public APIServerConnection {
  inline bool check_voice_assistant_api_connection_() const;
 #endif

+  // Get the max batch size based on client API version
+  // API 1.14+ clients don't receive object_id, so messages are smaller and more fit per batch
+  // TODO: Remove this method before 2026.7.0 and use MAX_INITIAL_PER_BATCH directly
+  size_t get_max_batch_size_() const {
+    return this->client_supports_api_version(1, 14) ? MAX_INITIAL_PER_BATCH : MAX_INITIAL_PER_BATCH_LEGACY;
+  }
+
  // Helper method to process multiple entities from an iterator in a batch
  template<typename Iterator> void process_iterator_batch_(Iterator &iterator) {
    size_t initial_size = this->deferred_batch_.size();
-    while (!iterator.completed() && (this->deferred_batch_.size() - initial_size) < MAX_INITIAL_PER_BATCH) {
+    size_t max_batch = this->get_max_batch_size_();
+    while (!iterator.completed() && (this->deferred_batch_.size() - initial_size) < max_batch) {
      iterator.advance();
    }

    // If the batch is full, process it immediately
    // Note: iterator.advance() already calls schedule_batch_() via schedule_message_()
-    if (this->deferred_batch_.size() >= MAX_INITIAL_PER_BATCH) {
+    if (this->deferred_batch_.size() >= max_batch) {
      this->process_batch_();
    }
  }
@@ -456,6 +462,12 @@ class APIConnection final : public APIServerConnection {
  static uint16_t try_send_alarm_control_panel_info(EntityBase *entity, APIConnection *conn, uint32_t remaining_size,
                                                    bool is_single);
 #endif
+#ifdef USE_WATER_HEATER
+  static uint16_t try_send_water_heater_state(EntityBase *entity, APIConnection *conn, uint32_t remaining_size,
+                                              bool is_single);
+  static uint16_t try_send_water_heater_info(EntityBase *entity, APIConnection *conn, uint32_t remaining_size,
+                                             bool is_single);
+#endif
 #ifdef USE_EVENT
  static uint16_t try_send_event_response(event::Event *event, const char *event_type, APIConnection *conn,
                                          uint32_t remaining_size, bool is_single);
@@ -490,18 +502,27 @@ class APIConnection final : public APIServerConnection {
  std::unique_ptr<APIFrameHelper> helper_;
  APIServer *parent_;

-  // Group 2: Larger objects (must be 4-byte aligned)
-  // These contain vectors/pointers internally, so putting them early ensures good alignment
-  InitialStateIterator initial_state_iterator_;
-  ListEntitiesIterator list_entities_iterator_;
+  // Group 2: Iterator union (saves ~16 bytes vs separate iterators)
+  // These iterators are never active simultaneously - list_entities runs to completion
+  // before initial_state begins, so we use a union with explicit construction/destruction.
+  enum class ActiveIterator : uint8_t { NONE, LIST_ENTITIES, INITIAL_STATE };
+
+  union IteratorUnion {
+    ListEntitiesIterator list_entities;
+    InitialStateIterator initial_state;
+    // Constructor/destructor do nothing - use placement new/explicit destructor
+    IteratorUnion() {}
+    ~IteratorUnion() {}
+  } iterator_storage_;
+
+  // Helper methods for iterator lifecycle management
+  void destroy_active_iterator_();
+  void begin_iterator_(ActiveIterator type);
 #ifdef USE_CAMERA
  std::unique_ptr<camera::CameraImageReader> image_reader_;
 #endif

-  // Group 3: Client info struct (24 bytes on 32-bit: 2 strings × 12 bytes each)
-  ClientInfo client_info_;
-
-  // Group 4: 4-byte types
+  // Group 3: 4-byte types
  uint32_t last_traffic_;
 #ifdef USE_API_HOMEASSISTANT_STATES
  int state_subs_at_ = -1;
@@ -608,7 +629,9 @@ class APIConnection final : public APIServerConnection {
  // 2-byte types immediately after flags_ (no padding between them)
  uint16_t client_api_version_major_{0};
  uint16_t client_api_version_minor_{0};
-  // Total: 2 (flags) + 2 + 2 = 6 bytes, then 2 bytes padding to next 4-byte boundary
+  // 1-byte type to fill padding
+  ActiveIterator active_iterator_{ActiveIterator::NONE};
+  // Total: 2 (flags) + 2 + 2 + 1 = 7 bytes, then 1 byte padding to next 4-byte boundary

  uint32_t get_batch_delay_ms_() const;
  // Message will use 8 more bytes than the minimum size, and typical
@@ -726,6 +749,8 @@ class APIConnection final : public APIServerConnection {
    return this->schedule_batch_();
  }

+  // Helper function to log client messages with name and peername
+  void log_client_(int level, const LogString *message);
  // Helper function to log API errors with errno
  void log_warning_(const LogString *message, APIError err);
  // Helper to handle fatal errors with logging
--- a/esphome/components/api/api_frame_helper.cpp
+++ b/esphome/components/api/api_frame_helper.cpp
@@ -1,6 +1,5 @@
 #include "api_frame_helper.h"
 #ifdef USE_API
-#include "api_connection.h"  // For ClientInfo struct
 #include "esphome/core/application.h"
 #include "esphome/core/hal.h"
 #include "esphome/core/helpers.h"
@@ -13,12 +12,29 @@ namespace esphome::api {

 static const char *const TAG = "api.frame_helper";

-#define HELPER_LOG(msg, ...) \
-  ESP_LOGVV(TAG, "%s (%s): " msg, this->client_info_->name.c_str(), this->client_info_->peername.c_str(), ##__VA_ARGS__)
+// Maximum bytes to log in hex format (168 * 3 = 504, under TX buffer size of 512)
+static constexpr size_t API_MAX_LOG_BYTES = 168;
+
+#if ESPHOME_LOG_LEVEL >= ESPHOME_LOG_LEVEL_VERY_VERBOSE
+#define HELPER_LOG(msg, ...) ESP_LOGVV(TAG, "%s (%s): " msg, this->client_name_, this->client_peername_, ##__VA_ARGS__)
+#else
+#define HELPER_LOG(msg, ...) ((void) 0)
+#endif

 #ifdef HELPER_LOG_PACKETS
-#define LOG_PACKET_RECEIVED(buffer) ESP_LOGVV(TAG, "Received frame: %s", format_hex_pretty(buffer).c_str())
-#define LOG_PACKET_SENDING(data, len) ESP_LOGVV(TAG, "Sending raw: %s", format_hex_pretty(data, len).c_str())
+#define LOG_PACKET_RECEIVED(buffer) \
+  do { \
+    char hex_buf_[format_hex_pretty_size(API_MAX_LOG_BYTES)]; \
+    ESP_LOGVV(TAG, "Received frame: %s", \
+              format_hex_pretty_to(hex_buf_, (buffer).data(), \
+                                   (buffer).size() < API_MAX_LOG_BYTES ? (buffer).size() : API_MAX_LOG_BYTES)); \
+  } while (0)
+#define LOG_PACKET_SENDING(data, len) \
+  do { \
+    char hex_buf_[format_hex_pretty_size(API_MAX_LOG_BYTES)]; \
+    ESP_LOGVV(TAG, "Sending raw: %s", \
+              format_hex_pretty_to(hex_buf_, data, (len) < API_MAX_LOG_BYTES ? (len) : API_MAX_LOG_BYTES)); \
+  } while (0)
 #else
 #define LOG_PACKET_RECEIVED(buffer) ((void) 0)
 #define LOG_PACKET_SENDING(data, len) ((void) 0)
@@ -229,6 +245,8 @@ APIError APIFrameHelper::init_common_() {
    HELPER_LOG("Bad state for init %d", (int) state_);
    return APIError::BAD_STATE;
  }
+  // Cache peername now while socket is valid - needed for error logging after socket failure
+  this->socket_->getpeername_to(this->client_peername_);
  int err = this->socket_->setblocking(false);
  if (err != 0) {
    state_ = State::FAILED;
--- a/esphome/components/api/api_frame_helper.h
+++ b/esphome/components/api/api_frame_helper.h
@@ -29,24 +29,28 @@ static constexpr uint16_t MAX_MESSAGE_SIZE = 8192;  // 8 KiB for ESP8266
 static constexpr uint16_t MAX_MESSAGE_SIZE = 32768;  // 32 KiB for ESP32 and other platforms
 #endif

-// Forward declaration
-struct ClientInfo;
+// Maximum number of messages to batch in a single write operation
+// Must be >= MAX_INITIAL_PER_BATCH in api_connection.h (enforced by static_assert there)
+static constexpr size_t MAX_MESSAGES_PER_BATCH = 34;

 class ProtoWriteBuffer;

+// Max client name length (e.g., "Home Assistant 2026.1.0.dev0" = 28 chars)
+static constexpr size_t CLIENT_INFO_NAME_MAX_LEN = 32;
+
 struct ReadPacketBuffer {
  const uint8_t *data;  // Points directly into frame helper's rx_buf_ (valid until next read_packet call)
  uint16_t data_len;
  uint16_t type;
 };

-// Packed packet info structure to minimize memory usage
-struct PacketInfo {
+// Packed message info structure to minimize memory usage
+struct MessageInfo {
  uint16_t offset;        // Offset in buffer where message starts
  uint16_t payload_size;  // Size of the message payload
  uint8_t message_type;   // Message type (0-255)

-  PacketInfo(uint8_t type, uint16_t off, uint16_t size) : offset(off), payload_size(size), message_type(type) {}
+  MessageInfo(uint8_t type, uint16_t off, uint16_t size) : offset(off), payload_size(size), message_type(type) {}
 };

 enum class APIError : uint16_t {
@@ -82,14 +86,23 @@ const LogString *api_error_to_logstr(APIError err);
 class APIFrameHelper {
 public:
  APIFrameHelper() = default;
-  explicit APIFrameHelper(std::unique_ptr<socket::Socket> socket, const ClientInfo *client_info)
-      : socket_(std::move(socket)), client_info_(client_info) {}
+  explicit APIFrameHelper(std::unique_ptr<socket::Socket> socket) : socket_(std::move(socket)) {}
+
+  // Get client name (null-terminated)
+  const char *get_client_name() const { return this->client_name_; }
+  // Get client peername/IP (null-terminated, cached at init time for availability after socket failure)
+  const char *get_client_peername() const { return this->client_peername_; }
+  // Set client name from buffer with length (truncates if needed)
+  void set_client_name(const char *name, size_t len) {
+    size_t copy_len = std::min(len, sizeof(this->client_name_) - 1);
+    memcpy(this->client_name_, name, copy_len);
+    this->client_name_[copy_len] = '\0';
+  }
  virtual ~APIFrameHelper() = default;
  virtual APIError init() = 0;
  virtual APIError loop();
  virtual APIError read_packet(ReadPacketBuffer *buffer) = 0;
  bool can_write_without_blocking() { return this->state_ == State::DATA && this->tx_buf_count_ == 0; }
-  std::string getpeername() { return socket_->getpeername(); }
  int getpeername(struct sockaddr *addr, socklen_t *addrlen) { return socket_->getpeername(addr, addrlen); }
  APIError close() {
    state_ = State::CLOSED;
@@ -107,11 +120,32 @@ class APIFrameHelper {
    }
    return APIError::OK;
  }
+  /// Toggle TCP_NODELAY socket option to control Nagle's algorithm.
+  ///
+  /// This is used to allow log messages to coalesce (Nagle enabled) while keeping
+  /// state updates low-latency (NODELAY enabled). Without this, many small log
+  /// packets fill the TCP send buffer, crowding out important state updates.
+  ///
+  /// State is tracked to minimize setsockopt() overhead - on lwip_raw (ESP8266/RP2040)
+  /// this is just a boolean assignment; on other platforms it's a lightweight syscall.
+  ///
+  /// @param enable true to enable NODELAY (disable Nagle), false to enable Nagle
+  /// @return true if successful or already in desired state
+  bool set_nodelay(bool enable) {
+    if (this->nodelay_enabled_ == enable)
+      return true;
+    int val = enable ? 1 : 0;
+    int err = this->socket_->setsockopt(IPPROTO_TCP, TCP_NODELAY, &val, sizeof(int));
+    if (err == 0) {
+      this->nodelay_enabled_ = enable;
+    }
+    return err == 0;
+  }
  virtual APIError write_protobuf_packet(uint8_t type, ProtoWriteBuffer buffer) = 0;
-  // Write multiple protobuf packets in a single operation
-  // packets contains (message_type, offset, length) for each message in the buffer
+  // Write multiple protobuf messages in a single operation
+  // messages contains (message_type, offset, length) for each message in the buffer
  // The buffer contains all messages with appropriate padding before each
-  virtual APIError write_protobuf_packets(ProtoWriteBuffer buffer, std::span<const PacketInfo> packets) = 0;
+  virtual APIError write_protobuf_messages(ProtoWriteBuffer buffer, std::span<const MessageInfo> messages) = 0;
  // Get the frame header padding required by this protocol
  uint8_t frame_header_padding() const { return frame_header_padding_; }
  // Get the frame footer size required by this protocol
@@ -127,12 +161,6 @@ class APIFrameHelper {
      // Use swap trick since shrink_to_fit() is non-binding and may be ignored
      std::vector<uint8_t>().swap(this->rx_buf_);
    }
-    // reusable_iovs_: Safe to release unconditionally.
-    // Only used within write_protobuf_packets() calls - cleared at start,
-    // populated with pointers, used for writev(), then function returns.
-    // The iovecs contain stale pointers after the call (data was either sent
-    // or copied to tx_buf_), and are cleared on next write_protobuf_packets().
-    std::vector<struct iovec>().swap(this->reusable_iovs_);
  }

 protected:
@@ -186,12 +214,12 @@ class APIFrameHelper {

  // Containers (size varies, but typically 12+ bytes on 32-bit)
  std::array<std::unique_ptr<SendBuffer>, API_MAX_SEND_QUEUE> tx_buf_;
-  std::vector<struct iovec> reusable_iovs_;
  std::vector<uint8_t> rx_buf_;

-  // Pointer to client info (4 bytes on 32-bit)
-  // Note: The pointed-to ClientInfo object must outlive this APIFrameHelper instance.
-  const ClientInfo *client_info_{nullptr};
+  // Client name buffer - stores name from Hello message or initial peername
+  char client_name_[CLIENT_INFO_NAME_MAX_LEN]{};
+  // Cached peername/IP address - captured at init time for availability after socket failure
+  char client_peername_[socket::SOCKADDR_STR_LEN]{};

  // Group smaller types together
  uint16_t rx_buf_len_ = 0;
@@ -201,7 +229,10 @@ class APIFrameHelper {
  uint8_t tx_buf_head_{0};
  uint8_t tx_buf_tail_{0};
  uint8_t tx_buf_count_{0};
-  // 8 bytes total, 0 bytes padding
+  // Tracks TCP_NODELAY state to minimize setsockopt() calls. Initialized to true
+  // since init_common_() enables NODELAY. Used by set_nodelay() to allow log
+  // messages to coalesce while keeping state updates low-latency.
+  bool nodelay_enabled_{true};

  // Common initialization for both plaintext and noise protocols
  APIError init_common_();
--- a/esphome/components/api/api_frame_helper_noise.cpp
+++ b/esphome/components/api/api_frame_helper_noise.cpp
@@ -24,12 +24,29 @@ static const char *const PROLOGUE_INIT = "NoiseAPIInit";
 #endif
 static constexpr size_t PROLOGUE_INIT_LEN = 12;  // strlen("NoiseAPIInit")

-#define HELPER_LOG(msg, ...) \
-  ESP_LOGVV(TAG, "%s (%s): " msg, this->client_info_->name.c_str(), this->client_info_->peername.c_str(), ##__VA_ARGS__)
+// Maximum bytes to log in hex format (168 * 3 = 504, under TX buffer size of 512)
+static constexpr size_t API_MAX_LOG_BYTES = 168;
+
+#if ESPHOME_LOG_LEVEL >= ESPHOME_LOG_LEVEL_VERY_VERBOSE
+#define HELPER_LOG(msg, ...) ESP_LOGVV(TAG, "%s (%s): " msg, this->client_name_, this->client_peername_, ##__VA_ARGS__)
+#else
+#define HELPER_LOG(msg, ...) ((void) 0)
+#endif

 #ifdef HELPER_LOG_PACKETS
-#define LOG_PACKET_RECEIVED(buffer) ESP_LOGVV(TAG, "Received frame: %s", format_hex_pretty(buffer).c_str())
-#define LOG_PACKET_SENDING(data, len) ESP_LOGVV(TAG, "Sending raw: %s", format_hex_pretty(data, len).c_str())
+#define LOG_PACKET_RECEIVED(buffer) \
+  do { \
+    char hex_buf_[format_hex_pretty_size(API_MAX_LOG_BYTES)]; \
+    ESP_LOGVV(TAG, "Received frame: %s", \
+              format_hex_pretty_to(hex_buf_, (buffer).data(), \
+                                   (buffer).size() < API_MAX_LOG_BYTES ? (buffer).size() : API_MAX_LOG_BYTES)); \
+  } while (0)
+#define LOG_PACKET_SENDING(data, len) \
+  do { \
+    char hex_buf_[format_hex_pretty_size(API_MAX_LOG_BYTES)]; \
+    ESP_LOGVV(TAG, "Sending raw: %s", \
+              format_hex_pretty_to(hex_buf_, data, (len) < API_MAX_LOG_BYTES ? (len) : API_MAX_LOG_BYTES)); \
+  } while (0)
 #else
 #define LOG_PACKET_RECEIVED(buffer) ((void) 0)
 #define LOG_PACKET_SENDING(data, len) ((void) 0)
@@ -415,12 +432,12 @@ APIError APINoiseFrameHelper::read_packet(ReadPacketBuffer *buffer) {
 APIError APINoiseFrameHelper::write_protobuf_packet(uint8_t type, ProtoWriteBuffer buffer) {
  // Resize to include MAC space (required for Noise encryption)
  buffer.get_buffer()->resize(buffer.get_buffer()->size() + frame_footer_size_);
-  PacketInfo packet{type, 0,
-                    static_cast<uint16_t>(buffer.get_buffer()->size() - frame_header_padding_ - frame_footer_size_)};
-  return write_protobuf_packets(buffer, std::span<const PacketInfo>(&packet, 1));
+  MessageInfo msg{type, 0,
+                  static_cast<uint16_t>(buffer.get_buffer()->size() - frame_header_padding_ - frame_footer_size_)};
+  return write_protobuf_messages(buffer, std::span<const MessageInfo>(&msg, 1));
 }

-APIError APINoiseFrameHelper::write_protobuf_packets(ProtoWriteBuffer buffer, std::span<const PacketInfo> packets) {
+APIError APINoiseFrameHelper::write_protobuf_messages(ProtoWriteBuffer buffer, std::span<const MessageInfo> messages) {
  APIError aerr = state_action_();
  if (aerr != APIError::OK) {
    return aerr;
@@ -430,20 +447,20 @@ APIError APINoiseFrameHelper::write_protobuf_packets(ProtoWriteBuffer buffer, st
    return APIError::WOULD_BLOCK;
  }

-  if (packets.empty()) {
+  if (messages.empty()) {
    return APIError::OK;
  }

  uint8_t *buffer_data = buffer.get_buffer()->data();

-  this->reusable_iovs_.clear();
-  this->reusable_iovs_.reserve(packets.size());
+  // Stack-allocated iovec array - no heap allocation
+  StaticVector<struct iovec, MAX_MESSAGES_PER_BATCH> iovs;
  uint16_t total_write_len = 0;

-  // We need to encrypt each packet in place
-  for (const auto &packet : packets) {
+  // We need to encrypt each message in place
+  for (const auto &msg : messages) {
    // The buffer already has padding at offset
-    uint8_t *buf_start = buffer_data + packet.offset;
+    uint8_t *buf_start = buffer_data + msg.offset;

    // Write noise header
    buf_start[0] = 0x01;  // indicator
@@ -451,10 +468,10 @@ APIError APINoiseFrameHelper::write_protobuf_packets(ProtoWriteBuffer buffer, st

    // Write message header (to be encrypted)
    const uint8_t msg_offset = 3;
-    buf_start[msg_offset] = static_cast<uint8_t>(packet.message_type >> 8);      // type high byte
-    buf_start[msg_offset + 1] = static_cast<uint8_t>(packet.message_type);       // type low byte
-    buf_start[msg_offset + 2] = static_cast<uint8_t>(packet.payload_size >> 8);  // data_len high byte
-    buf_start[msg_offset + 3] = static_cast<uint8_t>(packet.payload_size);       // data_len low byte
+    buf_start[msg_offset] = static_cast<uint8_t>(msg.message_type >> 8);      // type high byte
+    buf_start[msg_offset + 1] = static_cast<uint8_t>(msg.message_type);       // type low byte
+    buf_start[msg_offset + 2] = static_cast<uint8_t>(msg.payload_size >> 8);  // data_len high byte
+    buf_start[msg_offset + 3] = static_cast<uint8_t>(msg.payload_size);       // data_len low byte
    // payload data is already in the buffer starting at offset + 7

    // Make sure we have space for MAC
@@ -463,8 +480,8 @@ APIError APINoiseFrameHelper::write_protobuf_packets(ProtoWriteBuffer buffer, st
    // Encrypt the message in place
    NoiseBuffer mbuf;
    noise_buffer_init(mbuf);
-    noise_buffer_set_inout(mbuf, buf_start + msg_offset, 4 + packet.payload_size,
-                           4 + packet.payload_size + frame_footer_size_);
+    noise_buffer_set_inout(mbuf, buf_start + msg_offset, 4 + msg.payload_size,
+                           4 + msg.payload_size + frame_footer_size_);

    int err = noise_cipherstate_encrypt(send_cipher_, &mbuf);
    APIError aerr =
@@ -476,14 +493,14 @@ APIError APINoiseFrameHelper::write_protobuf_packets(ProtoWriteBuffer buffer, st
    buf_start[1] = static_cast<uint8_t>(mbuf.size >> 8);
    buf_start[2] = static_cast<uint8_t>(mbuf.size);

-    // Add iovec for this encrypted packet
-    size_t packet_len = static_cast<size_t>(3 + mbuf.size);  // indicator + size + encrypted data
-    this->reusable_iovs_.push_back({buf_start, packet_len});
-    total_write_len += packet_len;
+    // Add iovec for this encrypted message
+    size_t msg_len = static_cast<size_t>(3 + mbuf.size);  // indicator + size + encrypted data
+    iovs.push_back({buf_start, msg_len});
+    total_write_len += msg_len;
  }

-  // Send all encrypted packets in one writev call
-  return this->write_raw_(this->reusable_iovs_.data(), this->reusable_iovs_.size(), total_write_len);
+  // Send all encrypted messages in one writev call
+  return this->write_raw_(iovs.data(), iovs.size(), total_write_len);
 }

 APIError APINoiseFrameHelper::write_frame_(const uint8_t *data, uint16_t len) {
@@ -539,7 +556,8 @@ APIError APINoiseFrameHelper::init_handshake_() {
  if (aerr != APIError::OK)
    return aerr;
  // set_prologue copies it into handshakestate, so we can get rid of it now
-  prologue_ = {};
+  // Use swap idiom to actually release memory (= {} only clears size, not capacity)
+  std::vector<uint8_t>().swap(prologue_);

  err = noise_handshakestate_start(handshake_);
  aerr = handle_noise_error_(err, LOG_STR("noise_handshakestate_start"), APIError::HANDSHAKESTATE_SETUP_FAILED);
--- a/esphome/components/api/api_frame_helper_noise.h
+++ b/esphome/components/api/api_frame_helper_noise.h
@@ -9,8 +9,8 @@ namespace esphome::api {

 class APINoiseFrameHelper final : public APIFrameHelper {
 public:
-  APINoiseFrameHelper(std::unique_ptr<socket::Socket> socket, APINoiseContext &ctx, const ClientInfo *client_info)
-      : APIFrameHelper(std::move(socket), client_info), ctx_(ctx) {
+  APINoiseFrameHelper(std::unique_ptr<socket::Socket> socket, APINoiseContext &ctx)
+      : APIFrameHelper(std::move(socket)), ctx_(ctx) {
    // Noise header structure:
    // Pos 0: indicator (0x01)
    // Pos 1-2: encrypted payload size (16-bit big-endian)
@@ -23,7 +23,7 @@ class APINoiseFrameHelper final : public APIFrameHelper {
  APIError loop() override;
  APIError read_packet(ReadPacketBuffer *buffer) override;
  APIError write_protobuf_packet(uint8_t type, ProtoWriteBuffer buffer) override;
-  APIError write_protobuf_packets(ProtoWriteBuffer buffer, std::span<const PacketInfo> packets) override;
+  APIError write_protobuf_messages(ProtoWriteBuffer buffer, std::span<const MessageInfo> messages) override;

 protected:
  APIError state_action_();
--- a/esphome/components/api/api_frame_helper_plaintext.cpp
+++ b/esphome/components/api/api_frame_helper_plaintext.cpp
@@ -1,7 +1,6 @@
 #include "api_frame_helper_plaintext.h"
 #ifdef USE_API
 #ifdef USE_API_PLAINTEXT
-#include "api_connection.h"  // For ClientInfo struct
 #include "esphome/core/application.h"
 #include "esphome/core/hal.h"
 #include "esphome/core/helpers.h"
@@ -18,12 +17,29 @@ namespace esphome::api {

 static const char *const TAG = "api.plaintext";

-#define HELPER_LOG(msg, ...) \
-  ESP_LOGVV(TAG, "%s (%s): " msg, this->client_info_->name.c_str(), this->client_info_->peername.c_str(), ##__VA_ARGS__)
+// Maximum bytes to log in hex format (168 * 3 = 504, under TX buffer size of 512)
+static constexpr size_t API_MAX_LOG_BYTES = 168;
+
+#if ESPHOME_LOG_LEVEL >= ESPHOME_LOG_LEVEL_VERY_VERBOSE
+#define HELPER_LOG(msg, ...) ESP_LOGVV(TAG, "%s (%s): " msg, this->client_name_, this->client_peername_, ##__VA_ARGS__)
+#else
+#define HELPER_LOG(msg, ...) ((void) 0)
+#endif

 #ifdef HELPER_LOG_PACKETS
-#define LOG_PACKET_RECEIVED(buffer) ESP_LOGVV(TAG, "Received frame: %s", format_hex_pretty(buffer).c_str())
-#define LOG_PACKET_SENDING(data, len) ESP_LOGVV(TAG, "Sending raw: %s", format_hex_pretty(data, len).c_str())
+#define LOG_PACKET_RECEIVED(buffer) \
+  do { \
+    char hex_buf_[format_hex_pretty_size(API_MAX_LOG_BYTES)]; \
+    ESP_LOGVV(TAG, "Received frame: %s", \
+              format_hex_pretty_to(hex_buf_, (buffer).data(), \
+                                   (buffer).size() < API_MAX_LOG_BYTES ? (buffer).size() : API_MAX_LOG_BYTES)); \
+  } while (0)
+#define LOG_PACKET_SENDING(data, len) \
+  do { \
+    char hex_buf_[format_hex_pretty_size(API_MAX_LOG_BYTES)]; \
+    ESP_LOGVV(TAG, "Sending raw: %s", \
+              format_hex_pretty_to(hex_buf_, data, (len) < API_MAX_LOG_BYTES ? (len) : API_MAX_LOG_BYTES)); \
+  } while (0)
 #else
 #define LOG_PACKET_RECEIVED(buffer) ((void) 0)
 #define LOG_PACKET_SENDING(data, len) ((void) 0)
@@ -216,29 +232,30 @@ APIError APIPlaintextFrameHelper::read_packet(ReadPacketBuffer *buffer) {
  return APIError::OK;
 }
 APIError APIPlaintextFrameHelper::write_protobuf_packet(uint8_t type, ProtoWriteBuffer buffer) {
-  PacketInfo packet{type, 0, static_cast<uint16_t>(buffer.get_buffer()->size() - frame_header_padding_)};
-  return write_protobuf_packets(buffer, std::span<const PacketInfo>(&packet, 1));
+  MessageInfo msg{type, 0, static_cast<uint16_t>(buffer.get_buffer()->size() - frame_header_padding_)};
+  return write_protobuf_messages(buffer, std::span<const MessageInfo>(&msg, 1));
 }

-APIError APIPlaintextFrameHelper::write_protobuf_packets(ProtoWriteBuffer buffer, std::span<const PacketInfo> packets) {
+APIError APIPlaintextFrameHelper::write_protobuf_messages(ProtoWriteBuffer buffer,
+                                                          std::span<const MessageInfo> messages) {
  if (state_ != State::DATA) {
    return APIError::BAD_STATE;
  }

-  if (packets.empty()) {
+  if (messages.empty()) {
    return APIError::OK;
  }

  uint8_t *buffer_data = buffer.get_buffer()->data();

-  this->reusable_iovs_.clear();
-  this->reusable_iovs_.reserve(packets.size());
+  // Stack-allocated iovec array - no heap allocation
+  StaticVector<struct iovec, MAX_MESSAGES_PER_BATCH> iovs;
  uint16_t total_write_len = 0;

-  for (const auto &packet : packets) {
+  for (const auto &msg : messages) {
    // Calculate varint sizes for header layout
-    uint8_t size_varint_len = api::ProtoSize::varint(static_cast<uint32_t>(packet.payload_size));
-    uint8_t type_varint_len = api::ProtoSize::varint(static_cast<uint32_t>(packet.message_type));
+    uint8_t size_varint_len = api::ProtoSize::varint(static_cast<uint32_t>(msg.payload_size));
+    uint8_t type_varint_len = api::ProtoSize::varint(static_cast<uint32_t>(msg.message_type));
    uint8_t total_header_len = 1 + size_varint_len + type_varint_len;

    // Calculate where to start writing the header
@@ -266,25 +283,25 @@ APIError APIPlaintextFrameHelper::write_protobuf_packets(ProtoWriteBuffer buffer
    //
    // The message starts at offset + frame_header_padding_
    // So we write the header starting at offset + frame_header_padding_ - total_header_len
-    uint8_t *buf_start = buffer_data + packet.offset;
+    uint8_t *buf_start = buffer_data + msg.offset;
    uint32_t header_offset = frame_header_padding_ - total_header_len;

    // Write the plaintext header
    buf_start[header_offset] = 0x00;  // indicator

    // Encode varints directly into buffer
-    ProtoVarInt(packet.payload_size).encode_to_buffer_unchecked(buf_start + header_offset + 1, size_varint_len);
-    ProtoVarInt(packet.message_type)
+    ProtoVarInt(msg.payload_size).encode_to_buffer_unchecked(buf_start + header_offset + 1, size_varint_len);
+    ProtoVarInt(msg.message_type)
        .encode_to_buffer_unchecked(buf_start + header_offset + 1 + size_varint_len, type_varint_len);

-    // Add iovec for this packet (header + payload)
-    size_t packet_len = static_cast<size_t>(total_header_len + packet.payload_size);
-    this->reusable_iovs_.push_back({buf_start + header_offset, packet_len});
-    total_write_len += packet_len;
+    // Add iovec for this message (header + payload)
+    size_t msg_len = static_cast<size_t>(total_header_len + msg.payload_size);
+    iovs.push_back({buf_start + header_offset, msg_len});
+    total_write_len += msg_len;
  }

-  // Send all packets in one writev call
-  return write_raw_(this->reusable_iovs_.data(), this->reusable_iovs_.size(), total_write_len);
+  // Send all messages in one writev call
+  return write_raw_(iovs.data(), iovs.size(), total_write_len);
 }

 }  // namespace esphome::api
--- a/esphome/components/api/api_frame_helper_plaintext.h
+++ b/esphome/components/api/api_frame_helper_plaintext.h
@@ -7,8 +7,7 @@ namespace esphome::api {

 class APIPlaintextFrameHelper final : public APIFrameHelper {
 public:
-  APIPlaintextFrameHelper(std::unique_ptr<socket::Socket> socket, const ClientInfo *client_info)
-      : APIFrameHelper(std::move(socket), client_info) {
+  explicit APIPlaintextFrameHelper(std::unique_ptr<socket::Socket> socket) : APIFrameHelper(std::move(socket)) {
    // Plaintext header structure (worst case):
    // Pos 0: indicator (0x00)
    // Pos 1-3: payload size varint (up to 3 bytes)
@@ -21,7 +20,7 @@ class APIPlaintextFrameHelper final : public APIFrameHelper {
  APIError loop() override;
  APIError read_packet(ReadPacketBuffer *buffer) override;
  APIError write_protobuf_packet(uint8_t type, ProtoWriteBuffer buffer) override;
-  APIError write_protobuf_packets(ProtoWriteBuffer buffer, std::span<const PacketInfo> packets) override;
+  APIError write_protobuf_messages(ProtoWriteBuffer buffer, std::span<const MessageInfo> messages) override;

 protected:
  APIError try_read_frame_();
--- a/esphome/components/api/api_pb2.cpp
+++ b/esphome/components/api/api_pb2.cpp
--- a/esphome/components/api/api_pb2.h
+++ b/esphome/components/api/api_pb2.h
@@ -129,6 +129,25 @@ enum ClimatePreset : uint32_t {
  CLIMATE_PRESET_ACTIVITY = 7,
 };
 #endif
+#ifdef USE_WATER_HEATER
+enum WaterHeaterMode : uint32_t {
+  WATER_HEATER_MODE_OFF = 0,
+  WATER_HEATER_MODE_ECO = 1,
+  WATER_HEATER_MODE_ELECTRIC = 2,
+  WATER_HEATER_MODE_PERFORMANCE = 3,
+  WATER_HEATER_MODE_HIGH_DEMAND = 4,
+  WATER_HEATER_MODE_HEAT_PUMP = 5,
+  WATER_HEATER_MODE_GAS = 6,
+};
+#endif
+enum WaterHeaterCommandHasField : uint32_t {
+  WATER_HEATER_COMMAND_HAS_NONE = 0,
+  WATER_HEATER_COMMAND_HAS_MODE = 1,
+  WATER_HEATER_COMMAND_HAS_TARGET_TEMPERATURE = 2,
+  WATER_HEATER_COMMAND_HAS_STATE = 4,
+  WATER_HEATER_COMMAND_HAS_TARGET_TEMPERATURE_LOW = 8,
+  WATER_HEATER_COMMAND_HAS_TARGET_TEMPERATURE_HIGH = 16,
+};
 #ifdef USE_NUMBER
 enum NumberMode : uint32_t {
  NUMBER_MODE_AUTO = 0,
@@ -296,15 +315,12 @@ enum ZWaveProxyRequestType : uint32_t {
 class InfoResponseProtoMessage : public ProtoMessage {
 public:
  ~InfoResponseProtoMessage() override = default;
-  StringRef object_id_ref_{};
-  void set_object_id(const StringRef &ref) { this->object_id_ref_ = ref; }
+  StringRef object_id{};
  uint32_t key{0};
-  StringRef name_ref_{};
-  void set_name(const StringRef &ref) { this->name_ref_ = ref; }
+  StringRef name{};
  bool disabled_by_default{false};
 #ifdef USE_ENTITY_ICON
-  StringRef icon_ref_{};
-  void set_icon(const StringRef &ref) { this->icon_ref_ = ref; }
+  StringRef icon{};
 #endif
  enums::EntityCategory entity_category{};
 #ifdef USE_DEVICES
@@ -338,12 +354,11 @@ class CommandProtoMessage : public ProtoDecodableMessage {
 class HelloRequest final : public ProtoDecodableMessage {
 public:
  static constexpr uint8_t MESSAGE_TYPE = 1;
-  static constexpr uint8_t ESTIMATED_SIZE = 27;
+  static constexpr uint8_t ESTIMATED_SIZE = 17;
 #ifdef HAS_PROTO_MESSAGE_DUMP
  const char *message_name() const override { return "hello_request"; }
 #endif
-  const uint8_t *client_info{nullptr};
-  uint16_t client_info_len{0};
+  StringRef client_info{};
  uint32_t api_version_major{0};
  uint32_t api_version_minor{0};
 #ifdef HAS_PROTO_MESSAGE_DUMP
@@ -363,10 +378,8 @@ class HelloResponse final : public ProtoMessage {
 #endif
  uint32_t api_version_major{0};
  uint32_t api_version_minor{0};
-  StringRef server_info_ref_{};
-  void set_server_info(const StringRef &ref) { this->server_info_ref_ = ref; }
-  StringRef name_ref_{};
-  void set_name(const StringRef &ref) { this->name_ref_ = ref; }
+  StringRef server_info{};
+  StringRef name{};
  void encode(ProtoWriteBuffer buffer) const override;
  void calculate_size(ProtoSize &size) const override;
 #ifdef HAS_PROTO_MESSAGE_DUMP
@@ -375,40 +388,6 @@ class HelloResponse final : public ProtoMessage {

 protected:
 };
-#ifdef USE_API_PASSWORD
-class AuthenticationRequest final : public ProtoDecodableMessage {
- public:
-  static constexpr uint8_t MESSAGE_TYPE = 3;
-  static constexpr uint8_t ESTIMATED_SIZE = 19;
-#ifdef HAS_PROTO_MESSAGE_DUMP
-  const char *message_name() const override { return "authentication_request"; }
-#endif
-  const uint8_t *password{nullptr};
-  uint16_t password_len{0};
-#ifdef HAS_PROTO_MESSAGE_DUMP
-  void dump_to(std::string &out) const override;
-#endif
-
- protected:
-  bool decode_length(uint32_t field_id, ProtoLengthDelimited value) override;
-};
-class AuthenticationResponse final : public ProtoMessage {
- public:
-  static constexpr uint8_t MESSAGE_TYPE = 4;
-  static constexpr uint8_t ESTIMATED_SIZE = 2;
-#ifdef HAS_PROTO_MESSAGE_DUMP
-  const char *message_name() const override { return "authentication_response"; }
-#endif
-  bool invalid_password{false};
-  void encode(ProtoWriteBuffer buffer) const override;
-  void calculate_size(ProtoSize &size) const override;
-#ifdef HAS_PROTO_MESSAGE_DUMP
-  void dump_to(std::string &out) const override;
-#endif
-
- protected:
-};
-#endif
 class DisconnectRequest final : public ProtoMessage {
 public:
  static constexpr uint8_t MESSAGE_TYPE = 5;
@@ -478,8 +457,7 @@ class DeviceInfoRequest final : public ProtoMessage {
 class AreaInfo final : public ProtoMessage {
 public:
  uint32_t area_id{0};
-  StringRef name_ref_{};
-  void set_name(const StringRef &ref) { this->name_ref_ = ref; }
+  StringRef name{};
  void encode(ProtoWriteBuffer buffer) const override;
  void calculate_size(ProtoSize &size) const override;
 #ifdef HAS_PROTO_MESSAGE_DUMP
@@ -493,8 +471,7 @@ class AreaInfo final : public ProtoMessage {
 class DeviceInfo final : public ProtoMessage {
 public:
  uint32_t device_id{0};
-  StringRef name_ref_{};
-  void set_name(const StringRef &ref) { this->name_ref_ = ref; }
+  StringRef name{};
  uint32_t area_id{0};
  void encode(ProtoWriteBuffer buffer) const override;
  void calculate_size(ProtoSize &size) const override;
@@ -508,33 +485,23 @@ class DeviceInfo final : public ProtoMessage {
 class DeviceInfoResponse final : public ProtoMessage {
 public:
  static constexpr uint8_t MESSAGE_TYPE = 10;
-  static constexpr uint16_t ESTIMATED_SIZE = 257;
+  static constexpr uint8_t ESTIMATED_SIZE = 255;
 #ifdef HAS_PROTO_MESSAGE_DUMP
  const char *message_name() const override { return "device_info_response"; }
 #endif
-#ifdef USE_API_PASSWORD
-  bool uses_password{false};
-#endif
-  StringRef name_ref_{};
-  void set_name(const StringRef &ref) { this->name_ref_ = ref; }
-  StringRef mac_address_ref_{};
-  void set_mac_address(const StringRef &ref) { this->mac_address_ref_ = ref; }
-  StringRef esphome_version_ref_{};
-  void set_esphome_version(const StringRef &ref) { this->esphome_version_ref_ = ref; }
-  StringRef compilation_time_ref_{};
-  void set_compilation_time(const StringRef &ref) { this->compilation_time_ref_ = ref; }
-  StringRef model_ref_{};
-  void set_model(const StringRef &ref) { this->model_ref_ = ref; }
+  StringRef name{};
+  StringRef mac_address{};
+  StringRef esphome_version{};
+  StringRef compilation_time{};
+  StringRef model{};
 #ifdef USE_DEEP_SLEEP
  bool has_deep_sleep{false};
 #endif
 #ifdef ESPHOME_PROJECT_NAME
-  StringRef project_name_ref_{};
-  void set_project_name(const StringRef &ref) { this->project_name_ref_ = ref; }
+  StringRef project_name{};
 #endif
 #ifdef ESPHOME_PROJECT_NAME
-  StringRef project_version_ref_{};
-  void set_project_version(const StringRef &ref) { this->project_version_ref_ = ref; }
+  StringRef project_version{};
 #endif
 #ifdef USE_WEBSERVER
  uint32_t webserver_port{0};
@@ -542,20 +509,16 @@ class DeviceInfoResponse final : public ProtoMessage {
 #ifdef USE_BLUETOOTH_PROXY
  uint32_t bluetooth_proxy_feature_flags{0};
 #endif
-  StringRef manufacturer_ref_{};
-  void set_manufacturer(const StringRef &ref) { this->manufacturer_ref_ = ref; }
-  StringRef friendly_name_ref_{};
-  void set_friendly_name(const StringRef &ref) { this->friendly_name_ref_ = ref; }
+  StringRef manufacturer{};
+  StringRef friendly_name{};
 #ifdef USE_VOICE_ASSISTANT
  uint32_t voice_assistant_feature_flags{0};
 #endif
 #ifdef USE_AREAS
-  StringRef suggested_area_ref_{};
-  void set_suggested_area(const StringRef &ref) { this->suggested_area_ref_ = ref; }
+  StringRef suggested_area{};
 #endif
 #ifdef USE_BLUETOOTH_PROXY
-  StringRef bluetooth_mac_address_ref_{};
-  void set_bluetooth_mac_address(const StringRef &ref) { this->bluetooth_mac_address_ref_ = ref; }
+  StringRef bluetooth_mac_address{};
 #endif
 #ifdef USE_API_NOISE
  bool api_encryption_supported{false};
@@ -630,8 +593,7 @@ class ListEntitiesBinarySensorResponse final : public InfoResponseProtoMessage {
 #ifdef HAS_PROTO_MESSAGE_DUMP
  const char *message_name() const override { return "list_entities_binary_sensor_response"; }
 #endif
-  StringRef device_class_ref_{};
-  void set_device_class(const StringRef &ref) { this->device_class_ref_ = ref; }
+  StringRef device_class{};
  bool is_status_binary_sensor{false};
  void encode(ProtoWriteBuffer buffer) const override;
  void calculate_size(ProtoSize &size) const override;
@@ -670,8 +632,7 @@ class ListEntitiesCoverResponse final : public InfoResponseProtoMessage {
  bool assumed_state{false};
  bool supports_position{false};
  bool supports_tilt{false};
-  StringRef device_class_ref_{};
-  void set_device_class(const StringRef &ref) { this->device_class_ref_ = ref; }
+  StringRef device_class{};
  bool supports_stop{false};
  void encode(ProtoWriteBuffer buffer) const override;
  void calculate_size(ProtoSize &size) const override;
@@ -752,8 +713,7 @@ class FanStateResponse final : public StateResponseProtoMessage {
  bool oscillating{false};
  enums::FanDirection direction{};
  int32_t speed_level{0};
-  StringRef preset_mode_ref_{};
-  void set_preset_mode(const StringRef &ref) { this->preset_mode_ref_ = ref; }
+  StringRef preset_mode{};
  void encode(ProtoWriteBuffer buffer) const override;
  void calculate_size(ProtoSize &size) const override;
 #ifdef HAS_PROTO_MESSAGE_DUMP
@@ -778,7 +738,7 @@ class FanCommandRequest final : public CommandProtoMessage {
  bool has_speed_level{false};
  int32_t speed_level{0};
  bool has_preset_mode{false};
-  std::string preset_mode{};
+  StringRef preset_mode{};
 #ifdef HAS_PROTO_MESSAGE_DUMP
  void dump_to(std::string &out) const override;
 #endif
@@ -827,8 +787,7 @@ class LightStateResponse final : public StateResponseProtoMessage {
  float color_temperature{0.0f};
  float cold_white{0.0f};
  float warm_white{0.0f};
-  StringRef effect_ref_{};
-  void set_effect(const StringRef &ref) { this->effect_ref_ = ref; }
+  StringRef effect{};
  void encode(ProtoWriteBuffer buffer) const override;
  void calculate_size(ProtoSize &size) const override;
 #ifdef HAS_PROTO_MESSAGE_DUMP
@@ -840,7 +799,7 @@ class LightStateResponse final : public StateResponseProtoMessage {
 class LightCommandRequest final : public CommandProtoMessage {
 public:
  static constexpr uint8_t MESSAGE_TYPE = 32;
-  static constexpr uint8_t ESTIMATED_SIZE = 122;
+  static constexpr uint8_t ESTIMATED_SIZE = 112;
 #ifdef HAS_PROTO_MESSAGE_DUMP
  const char *message_name() const override { return "light_command_request"; }
 #endif
@@ -869,8 +828,7 @@ class LightCommandRequest final : public CommandProtoMessage {
  bool has_flash_length{false};
  uint32_t flash_length{0};
  bool has_effect{false};
-  const uint8_t *effect{nullptr};
-  uint16_t effect_len{0};
+  StringRef effect{};
 #ifdef HAS_PROTO_MESSAGE_DUMP
  void dump_to(std::string &out) const override;
 #endif
@@ -889,12 +847,10 @@ class ListEntitiesSensorResponse final : public InfoResponseProtoMessage {
 #ifdef HAS_PROTO_MESSAGE_DUMP
  const char *message_name() const override { return "list_entities_sensor_response"; }
 #endif
-  StringRef unit_of_measurement_ref_{};
-  void set_unit_of_measurement(const StringRef &ref) { this->unit_of_measurement_ref_ = ref; }
+  StringRef unit_of_measurement{};
  int32_t accuracy_decimals{0};
  bool force_update{false};
-  StringRef device_class_ref_{};
-  void set_device_class(const StringRef &ref) { this->device_class_ref_ = ref; }
+  StringRef device_class{};
  enums::SensorStateClass state_class{};
  void encode(ProtoWriteBuffer buffer) const override;
  void calculate_size(ProtoSize &size) const override;
@@ -931,8 +887,7 @@ class ListEntitiesSwitchResponse final : public InfoResponseProtoMessage {
  const char *message_name() const override { return "list_entities_switch_response"; }
 #endif
  bool assumed_state{false};
-  StringRef device_class_ref_{};
-  void set_device_class(const StringRef &ref) { this->device_class_ref_ = ref; }
+  StringRef device_class{};
  void encode(ProtoWriteBuffer buffer) const override;
  void calculate_size(ProtoSize &size) const override;
 #ifdef HAS_PROTO_MESSAGE_DUMP
@@ -982,8 +937,7 @@ class ListEntitiesTextSensorResponse final : public InfoResponseProtoMessage {
 #ifdef HAS_PROTO_MESSAGE_DUMP
  const char *message_name() const override { return "list_entities_text_sensor_response"; }
 #endif
-  StringRef device_class_ref_{};
-  void set_device_class(const StringRef &ref) { this->device_class_ref_ = ref; }
+  StringRef device_class{};
  void encode(ProtoWriteBuffer buffer) const override;
  void calculate_size(ProtoSize &size) const override;
 #ifdef HAS_PROTO_MESSAGE_DUMP
@@ -999,8 +953,7 @@ class TextSensorStateResponse final : public StateResponseProtoMessage {
 #ifdef HAS_PROTO_MESSAGE_DUMP
  const char *message_name() const override { return "text_sensor_state_response"; }
 #endif
-  StringRef state_ref_{};
-  void set_state(const StringRef &ref) { this->state_ref_ = ref; }
+  StringRef state{};
  bool missing_state{false};
  void encode(ProtoWriteBuffer buffer) const override;
  void calculate_size(ProtoSize &size) const override;
@@ -1030,7 +983,7 @@ class SubscribeLogsRequest final : public ProtoDecodableMessage {
 class SubscribeLogsResponse final : public ProtoMessage {
 public:
  static constexpr uint8_t MESSAGE_TYPE = 29;
-  static constexpr uint8_t ESTIMATED_SIZE = 11;
+  static constexpr uint8_t ESTIMATED_SIZE = 21;
 #ifdef HAS_PROTO_MESSAGE_DUMP
  const char *message_name() const override { return "subscribe_logs_response"; }
 #endif
@@ -1053,11 +1006,12 @@ class SubscribeLogsResponse final : public ProtoMessage {
 class NoiseEncryptionSetKeyRequest final : public ProtoDecodableMessage {
 public:
  static constexpr uint8_t MESSAGE_TYPE = 124;
-  static constexpr uint8_t ESTIMATED_SIZE = 9;
+  static constexpr uint8_t ESTIMATED_SIZE = 19;
 #ifdef HAS_PROTO_MESSAGE_DUMP
  const char *message_name() const override { return "noise_encryption_set_key_request"; }
 #endif
-  std::string key{};
+  const uint8_t *key{nullptr};
+  uint16_t key_len{0};
 #ifdef HAS_PROTO_MESSAGE_DUMP
  void dump_to(std::string &out) const override;
 #endif
@@ -1098,8 +1052,7 @@ class SubscribeHomeassistantServicesRequest final : public ProtoMessage {
 };
 class HomeassistantServiceMap final : public ProtoMessage {
 public:
-  StringRef key_ref_{};
-  void set_key(const StringRef &ref) { this->key_ref_ = ref; }
+  StringRef key{};
  std::string value{};
  void encode(ProtoWriteBuffer buffer) const override;
  void calculate_size(ProtoSize &size) const override;
@@ -1116,8 +1069,7 @@ class HomeassistantActionRequest final : public ProtoMessage {
 #ifdef HAS_PROTO_MESSAGE_DUMP
  const char *message_name() const override { return "homeassistant_action_request"; }
 #endif
-  StringRef service_ref_{};
-  void set_service(const StringRef &ref) { this->service_ref_ = ref; }
+  StringRef service{};
  FixedVector<HomeassistantServiceMap> data{};
  FixedVector<HomeassistantServiceMap> data_template{};
  FixedVector<HomeassistantServiceMap> variables{};
@@ -1150,7 +1102,7 @@ class HomeassistantActionResponse final : public ProtoDecodableMessage {
 #endif
  uint32_t call_id{0};
  bool success{false};
-  std::string error_message{};
+  StringRef error_message{};
 #ifdef USE_API_HOMEASSISTANT_ACTION_RESPONSES_JSON
  const uint8_t *response_data{nullptr};
  uint16_t response_data_len{0};
@@ -1185,10 +1137,8 @@ class SubscribeHomeAssistantStateResponse final : public ProtoMessage {
 #ifdef HAS_PROTO_MESSAGE_DUMP
  const char *message_name() const override { return "subscribe_home_assistant_state_response"; }
 #endif
-  StringRef entity_id_ref_{};
-  void set_entity_id(const StringRef &ref) { this->entity_id_ref_ = ref; }
-  StringRef attribute_ref_{};
-  void set_attribute(const StringRef &ref) { this->attribute_ref_ = ref; }
+  StringRef entity_id{};
+  StringRef attribute{};
  bool once{false};
  void encode(ProtoWriteBuffer buffer) const override;
  void calculate_size(ProtoSize &size) const override;
@@ -1205,9 +1155,9 @@ class HomeAssistantStateResponse final : public ProtoDecodableMessage {
 #ifdef HAS_PROTO_MESSAGE_DUMP
  const char *message_name() const override { return "home_assistant_state_response"; }
 #endif
-  std::string entity_id{};
-  std::string state{};
-  std::string attribute{};
+  StringRef entity_id{};
+  StringRef state{};
+  StringRef attribute{};
 #ifdef HAS_PROTO_MESSAGE_DUMP
  void dump_to(std::string &out) const override;
 #endif
@@ -1232,13 +1182,12 @@ class GetTimeRequest final : public ProtoMessage {
 class GetTimeResponse final : public ProtoDecodableMessage {
 public:
  static constexpr uint8_t MESSAGE_TYPE = 37;
-  static constexpr uint8_t ESTIMATED_SIZE = 24;
+  static constexpr uint8_t ESTIMATED_SIZE = 14;
 #ifdef HAS_PROTO_MESSAGE_DUMP
  const char *message_name() const override { return "get_time_response"; }
 #endif
  uint32_t epoch_seconds{0};
-  const uint8_t *timezone{nullptr};
-  uint16_t timezone_len{0};
+  StringRef timezone{};
 #ifdef HAS_PROTO_MESSAGE_DUMP
  void dump_to(std::string &out) const override;
 #endif
@@ -1250,8 +1199,7 @@ class GetTimeResponse final : public ProtoDecodableMessage {
 #ifdef USE_API_USER_DEFINED_ACTIONS
 class ListEntitiesServicesArgument final : public ProtoMessage {
 public:
-  StringRef name_ref_{};
-  void set_name(const StringRef &ref) { this->name_ref_ = ref; }
+  StringRef name{};
  enums::ServiceArgType type{};
  void encode(ProtoWriteBuffer buffer) const override;
  void calculate_size(ProtoSize &size) const override;
@@ -1268,8 +1216,7 @@ class ListEntitiesServicesResponse final : public ProtoMessage {
 #ifdef HAS_PROTO_MESSAGE_DUMP
  const char *message_name() const override { return "list_entities_services_response"; }
 #endif
-  StringRef name_ref_{};
-  void set_name(const StringRef &ref) { this->name_ref_ = ref; }
+  StringRef name{};
  uint32_t key{0};
  FixedVector<ListEntitiesServicesArgument> args{};
  enums::SupportsResponseType supports_response{};
@@ -1286,7 +1233,7 @@ class ExecuteServiceArgument final : public ProtoDecodableMessage {
  bool bool_{false};
  int32_t legacy_int{0};
  float float_{0.0f};
-  std::string string_{};
+  StringRef string_{};
  int32_t int_{0};
  FixedVector<bool> bool_array{};
  FixedVector<int32_t> int_array{};
@@ -1338,8 +1285,7 @@ class ExecuteServiceResponse final : public ProtoMessage {
 #endif
  uint32_t call_id{0};
  bool success{false};
-  StringRef error_message_ref_{};
-  void set_error_message(const StringRef &ref) { this->error_message_ref_ = ref; }
+  StringRef error_message{};
 #ifdef USE_API_USER_DEFINED_ACTION_RESPONSES_JSON
  const uint8_t *response_data{nullptr};
  uint16_t response_data_len{0};
@@ -1372,7 +1318,7 @@ class ListEntitiesCameraResponse final : public InfoResponseProtoMessage {
 class CameraImageResponse final : public StateResponseProtoMessage {
 public:
  static constexpr uint8_t MESSAGE_TYPE = 44;
-  static constexpr uint8_t ESTIMATED_SIZE = 20;
+  static constexpr uint8_t ESTIMATED_SIZE = 30;
 #ifdef HAS_PROTO_MESSAGE_DUMP
  const char *message_name() const override { return "camera_image_response"; }
 #endif
@@ -1457,11 +1403,9 @@ class ClimateStateResponse final : public StateResponseProtoMessage {
  enums::ClimateAction action{};
  enums::ClimateFanMode fan_mode{};
  enums::ClimateSwingMode swing_mode{};
-  StringRef custom_fan_mode_ref_{};
-  void set_custom_fan_mode(const StringRef &ref) { this->custom_fan_mode_ref_ = ref; }
+  StringRef custom_fan_mode{};
  enums::ClimatePreset preset{};
-  StringRef custom_preset_ref_{};
-  void set_custom_preset(const StringRef &ref) { this->custom_preset_ref_ = ref; }
+  StringRef custom_preset{};
  float current_humidity{0.0f};
  float target_humidity{0.0f};
  void encode(ProtoWriteBuffer buffer) const override;
@@ -1492,11 +1436,11 @@ class ClimateCommandRequest final : public CommandProtoMessage {
  bool has_swing_mode{false};
  enums::ClimateSwingMode swing_mode{};
  bool has_custom_fan_mode{false};
-  std::string custom_fan_mode{};
+  StringRef custom_fan_mode{};
  bool has_preset{false};
  enums::ClimatePreset preset{};
  bool has_custom_preset{false};
-  std::string custom_preset{};
+  StringRef custom_preset{};
  bool has_target_humidity{false};
  float target_humidity{0.0f};
 #ifdef HAS_PROTO_MESSAGE_DUMP
@@ -1509,6 +1453,70 @@ class ClimateCommandRequest final : public CommandProtoMessage {
  bool decode_varint(uint32_t field_id, ProtoVarInt value) override;
 };
 #endif
+#ifdef USE_WATER_HEATER
+class ListEntitiesWaterHeaterResponse final : public InfoResponseProtoMessage {
+ public:
+  static constexpr uint8_t MESSAGE_TYPE = 132;
+  static constexpr uint8_t ESTIMATED_SIZE = 63;
+#ifdef HAS_PROTO_MESSAGE_DUMP
+  const char *message_name() const override { return "list_entities_water_heater_response"; }
+#endif
+  float min_temperature{0.0f};
+  float max_temperature{0.0f};
+  float target_temperature_step{0.0f};
+  const water_heater::WaterHeaterModeMask *supported_modes{};
+  uint32_t supported_features{0};
+  void encode(ProtoWriteBuffer buffer) const override;
+  void calculate_size(ProtoSize &size) const override;
+#ifdef HAS_PROTO_MESSAGE_DUMP
+  void dump_to(std::string &out) const override;
+#endif
+
+ protected:
+};
+class WaterHeaterStateResponse final : public StateResponseProtoMessage {
+ public:
+  static constexpr uint8_t MESSAGE_TYPE = 133;
+  static constexpr uint8_t ESTIMATED_SIZE = 35;
+#ifdef HAS_PROTO_MESSAGE_DUMP
+  const char *message_name() const override { return "water_heater_state_response"; }
+#endif
+  float current_temperature{0.0f};
+  float target_temperature{0.0f};
+  enums::WaterHeaterMode mode{};
+  uint32_t state{0};
+  float target_temperature_low{0.0f};
+  float target_temperature_high{0.0f};
+  void encode(ProtoWriteBuffer buffer) const override;
+  void calculate_size(ProtoSize &size) const override;
+#ifdef HAS_PROTO_MESSAGE_DUMP
+  void dump_to(std::string &out) const override;
+#endif
+
+ protected:
+};
+class WaterHeaterCommandRequest final : public CommandProtoMessage {
+ public:
+  static constexpr uint8_t MESSAGE_TYPE = 134;
+  static constexpr uint8_t ESTIMATED_SIZE = 34;
+#ifdef HAS_PROTO_MESSAGE_DUMP
+  const char *message_name() const override { return "water_heater_command_request"; }
+#endif
+  uint32_t has_fields{0};
+  enums::WaterHeaterMode mode{};
+  float target_temperature{0.0f};
+  uint32_t state{0};
+  float target_temperature_low{0.0f};
+  float target_temperature_high{0.0f};
+#ifdef HAS_PROTO_MESSAGE_DUMP
+  void dump_to(std::string &out) const override;
+#endif
+
+ protected:
+  bool decode_32bit(uint32_t field_id, Proto32Bit value) override;
+  bool decode_varint(uint32_t field_id, ProtoVarInt value) override;
+};
+#endif
 #ifdef USE_NUMBER
 class ListEntitiesNumberResponse final : public InfoResponseProtoMessage {
 public:
@@ -1520,11 +1528,9 @@ class ListEntitiesNumberResponse final : public InfoResponseProtoMessage {
  float min_value{0.0f};
  float max_value{0.0f};
  float step{0.0f};
-  StringRef unit_of_measurement_ref_{};
-  void set_unit_of_measurement(const StringRef &ref) { this->unit_of_measurement_ref_ = ref; }
+  StringRef unit_of_measurement{};
  enums::NumberMode mode{};
-  StringRef device_class_ref_{};
-  void set_device_class(const StringRef &ref) { this->device_class_ref_ = ref; }
+  StringRef device_class{};
  void encode(ProtoWriteBuffer buffer) const override;
  void calculate_size(ProtoSize &size) const override;
 #ifdef HAS_PROTO_MESSAGE_DUMP
@@ -1591,8 +1597,7 @@ class SelectStateResponse final : public StateResponseProtoMessage {
 #ifdef HAS_PROTO_MESSAGE_DUMP
  const char *message_name() const override { return "select_state_response"; }
 #endif
-  StringRef state_ref_{};
-  void set_state(const StringRef &ref) { this->state_ref_ = ref; }
+  StringRef state{};
  bool missing_state{false};
  void encode(ProtoWriteBuffer buffer) const override;
  void calculate_size(ProtoSize &size) const override;
@@ -1605,12 +1610,11 @@ class SelectStateResponse final : public StateResponseProtoMessage {
 class SelectCommandRequest final : public CommandProtoMessage {
 public:
  static constexpr uint8_t MESSAGE_TYPE = 54;
-  static constexpr uint8_t ESTIMATED_SIZE = 28;
+  static constexpr uint8_t ESTIMATED_SIZE = 18;
 #ifdef HAS_PROTO_MESSAGE_DUMP
  const char *message_name() const override { return "select_command_request"; }
 #endif
-  const uint8_t *state{nullptr};
-  uint16_t state_len{0};
+  StringRef state{};
 #ifdef HAS_PROTO_MESSAGE_DUMP
  void dump_to(std::string &out) const override;
 #endif
@@ -1629,7 +1633,7 @@ class ListEntitiesSirenResponse final : public InfoResponseProtoMessage {
 #ifdef HAS_PROTO_MESSAGE_DUMP
  const char *message_name() const override { return "list_entities_siren_response"; }
 #endif
-  std::vector<std::string> tones{};
+  const FixedVector<const char *> *tones{};
  bool supports_duration{false};
  bool supports_volume{false};
  void encode(ProtoWriteBuffer buffer) const override;
@@ -1666,7 +1670,7 @@ class SirenCommandRequest final : public CommandProtoMessage {
  bool has_state{false};
  bool state{false};
  bool has_tone{false};
-  std::string tone{};
+  StringRef tone{};
  bool has_duration{false};
  uint32_t duration{0};
  bool has_volume{false};
@@ -1692,8 +1696,7 @@ class ListEntitiesLockResponse final : public InfoResponseProtoMessage {
  bool assumed_state{false};
  bool supports_open{false};
  bool requires_code{false};
-  StringRef code_format_ref_{};
-  void set_code_format(const StringRef &ref) { this->code_format_ref_ = ref; }
+  StringRef code_format{};
  void encode(ProtoWriteBuffer buffer) const override;
  void calculate_size(ProtoSize &size) const override;
 #ifdef HAS_PROTO_MESSAGE_DUMP
@@ -1727,7 +1730,7 @@ class LockCommandRequest final : public CommandProtoMessage {
 #endif
  enums::LockCommand command{};
  bool has_code{false};
-  std::string code{};
+  StringRef code{};
 #ifdef HAS_PROTO_MESSAGE_DUMP
  void dump_to(std::string &out) const override;
 #endif
@@ -1746,8 +1749,7 @@ class ListEntitiesButtonResponse final : public InfoResponseProtoMessage {
 #ifdef HAS_PROTO_MESSAGE_DUMP
  const char *message_name() const override { return "list_entities_button_response"; }
 #endif
-  StringRef device_class_ref_{};
-  void set_device_class(const StringRef &ref) { this->device_class_ref_ = ref; }
+  StringRef device_class{};
  void encode(ProtoWriteBuffer buffer) const override;
  void calculate_size(ProtoSize &size) const override;
 #ifdef HAS_PROTO_MESSAGE_DUMP
@@ -1775,8 +1777,7 @@ class ButtonCommandRequest final : public CommandProtoMessage {
 #ifdef USE_MEDIA_PLAYER
 class MediaPlayerSupportedFormat final : public ProtoMessage {
 public:
-  StringRef format_ref_{};
-  void set_format(const StringRef &ref) { this->format_ref_ = ref; }
+  StringRef format{};
  uint32_t sample_rate{0};
  uint32_t num_channels{0};
  enums::MediaPlayerFormatPurpose purpose{};
@@ -1837,7 +1838,7 @@ class MediaPlayerCommandRequest final : public CommandProtoMessage {
  bool has_volume{false};
  float volume{0.0f};
  bool has_media_url{false};
-  std::string media_url{};
+  StringRef media_url{};
  bool has_announcement{false};
  bool announcement{false};
 #ifdef HAS_PROTO_MESSAGE_DUMP
@@ -2044,7 +2045,7 @@ class BluetoothGATTReadRequest final : public ProtoDecodableMessage {
 class BluetoothGATTReadResponse final : public ProtoMessage {
 public:
  static constexpr uint8_t MESSAGE_TYPE = 74;
-  static constexpr uint8_t ESTIMATED_SIZE = 17;
+  static constexpr uint8_t ESTIMATED_SIZE = 27;
 #ifdef HAS_PROTO_MESSAGE_DUMP
  const char *message_name() const override { return "bluetooth_gatt_read_response"; }
 #endif
@@ -2139,7 +2140,7 @@ class BluetoothGATTNotifyRequest final : public ProtoDecodableMessage {
 class BluetoothGATTNotifyDataResponse final : public ProtoMessage {
 public:
  static constexpr uint8_t MESSAGE_TYPE = 79;
-  static constexpr uint8_t ESTIMATED_SIZE = 17;
+  static constexpr uint8_t ESTIMATED_SIZE = 27;
 #ifdef HAS_PROTO_MESSAGE_DUMP
  const char *message_name() const override { return "bluetooth_gatt_notify_data_response"; }
 #endif
@@ -2381,12 +2382,10 @@ class VoiceAssistantRequest final : public ProtoMessage {
  const char *message_name() const override { return "voice_assistant_request"; }
 #endif
  bool start{false};
-  StringRef conversation_id_ref_{};
-  void set_conversation_id(const StringRef &ref) { this->conversation_id_ref_ = ref; }
+  StringRef conversation_id{};
  uint32_t flags{0};
  VoiceAssistantAudioSettings audio_settings{};
-  StringRef wake_word_phrase_ref_{};
-  void set_wake_word_phrase(const StringRef &ref) { this->wake_word_phrase_ref_ = ref; }
+  StringRef wake_word_phrase{};
  void encode(ProtoWriteBuffer buffer) const override;
  void calculate_size(ProtoSize &size) const override;
 #ifdef HAS_PROTO_MESSAGE_DUMP
@@ -2413,8 +2412,8 @@ class VoiceAssistantResponse final : public ProtoDecodableMessage {
 };
 class VoiceAssistantEventData final : public ProtoDecodableMessage {
 public:
-  std::string name{};
-  std::string value{};
+  StringRef name{};
+  StringRef value{};
 #ifdef HAS_PROTO_MESSAGE_DUMP
  void dump_to(std::string &out) const override;
 #endif
@@ -2442,17 +2441,12 @@ class VoiceAssistantEventResponse final : public ProtoDecodableMessage {
 class VoiceAssistantAudio final : public ProtoDecodableMessage {
 public:
  static constexpr uint8_t MESSAGE_TYPE = 106;
-  static constexpr uint8_t ESTIMATED_SIZE = 11;
+  static constexpr uint8_t ESTIMATED_SIZE = 21;
 #ifdef HAS_PROTO_MESSAGE_DUMP
  const char *message_name() const override { return "voice_assistant_audio"; }
 #endif
-  std::string data{};
-  const uint8_t *data_ptr_{nullptr};
-  size_t data_len_{0};
-  void set_data(const uint8_t *data, size_t len) {
-    this->data_ptr_ = data;
-    this->data_len_ = len;
-  }
+  const uint8_t *data{nullptr};
+  uint16_t data_len{0};
  bool end{false};
  void encode(ProtoWriteBuffer buffer) const override;
  void calculate_size(ProtoSize &size) const override;
@@ -2472,8 +2466,8 @@ class VoiceAssistantTimerEventResponse final : public ProtoDecodableMessage {
  const char *message_name() const override { return "voice_assistant_timer_event_response"; }
 #endif
  enums::VoiceAssistantTimerEvent event_type{};
-  std::string timer_id{};
-  std::string name{};
+  StringRef timer_id{};
+  StringRef name{};
  uint32_t total_seconds{0};
  uint32_t seconds_left{0};
  bool is_active{false};
@@ -2492,9 +2486,9 @@ class VoiceAssistantAnnounceRequest final : public ProtoDecodableMessage {
 #ifdef HAS_PROTO_MESSAGE_DUMP
  const char *message_name() const override { return "voice_assistant_announce_request"; }
 #endif
-  std::string media_id{};
-  std::string text{};
-  std::string preannounce_media_id{};
+  StringRef media_id{};
+  StringRef text{};
+  StringRef preannounce_media_id{};
  bool start_conversation{false};
 #ifdef HAS_PROTO_MESSAGE_DUMP
  void dump_to(std::string &out) const override;
@@ -2522,10 +2516,8 @@ class VoiceAssistantAnnounceFinished final : public ProtoMessage {
 };
 class VoiceAssistantWakeWord final : public ProtoMessage {
 public:
-  StringRef id_ref_{};
-  void set_id(const StringRef &ref) { this->id_ref_ = ref; }
-  StringRef wake_word_ref_{};
-  void set_wake_word(const StringRef &ref) { this->wake_word_ref_ = ref; }
+  StringRef id{};
+  StringRef wake_word{};
  std::vector<std::string> trained_languages{};
  void encode(ProtoWriteBuffer buffer) const override;
  void calculate_size(ProtoSize &size) const override;
@@ -2537,13 +2529,13 @@ class VoiceAssistantWakeWord final : public ProtoMessage {
 };
 class VoiceAssistantExternalWakeWord final : public ProtoDecodableMessage {
 public:
-  std::string id{};
-  std::string wake_word{};
+  StringRef id{};
+  StringRef wake_word{};
  std::vector<std::string> trained_languages{};
-  std::string model_type{};
+  StringRef model_type{};
  uint32_t model_size{0};
-  std::string model_hash{};
-  std::string url{};
+  StringRef model_hash{};
+  StringRef url{};
 #ifdef HAS_PROTO_MESSAGE_DUMP
  void dump_to(std::string &out) const override;
 #endif
@@ -2644,7 +2636,7 @@ class AlarmControlPanelCommandRequest final : public CommandProtoMessage {
  const char *message_name() const override { return "alarm_control_panel_command_request"; }
 #endif
  enums::AlarmControlPanelStateCommand command{};
-  std::string code{};
+  StringRef code{};
 #ifdef HAS_PROTO_MESSAGE_DUMP
  void dump_to(std::string &out) const override;
 #endif
@@ -2665,8 +2657,7 @@ class ListEntitiesTextResponse final : public InfoResponseProtoMessage {
 #endif
  uint32_t min_length{0};
  uint32_t max_length{0};
-  StringRef pattern_ref_{};
-  void set_pattern(const StringRef &ref) { this->pattern_ref_ = ref; }
+  StringRef pattern{};
  enums::TextMode mode{};
  void encode(ProtoWriteBuffer buffer) const override;
  void calculate_size(ProtoSize &size) const override;
@@ -2683,8 +2674,7 @@ class TextStateResponse final : public StateResponseProtoMessage {
 #ifdef HAS_PROTO_MESSAGE_DUMP
  const char *message_name() const override { return "text_state_response"; }
 #endif
-  StringRef state_ref_{};
-  void set_state(const StringRef &ref) { this->state_ref_ = ref; }
+  StringRef state{};
  bool missing_state{false};
  void encode(ProtoWriteBuffer buffer) const override;
  void calculate_size(ProtoSize &size) const override;
@@ -2701,7 +2691,7 @@ class TextCommandRequest final : public CommandProtoMessage {
 #ifdef HAS_PROTO_MESSAGE_DUMP
  const char *message_name() const override { return "text_command_request"; }
 #endif
-  std::string state{};
+  StringRef state{};
 #ifdef HAS_PROTO_MESSAGE_DUMP
  void dump_to(std::string &out) const override;
 #endif
@@ -2828,8 +2818,7 @@ class ListEntitiesEventResponse final : public InfoResponseProtoMessage {
 #ifdef HAS_PROTO_MESSAGE_DUMP
  const char *message_name() const override { return "list_entities_event_response"; }
 #endif
-  StringRef device_class_ref_{};
-  void set_device_class(const StringRef &ref) { this->device_class_ref_ = ref; }
+  StringRef device_class{};
  const FixedVector<const char *> *event_types{};
  void encode(ProtoWriteBuffer buffer) const override;
  void calculate_size(ProtoSize &size) const override;
@@ -2846,8 +2835,7 @@ class EventResponse final : public StateResponseProtoMessage {
 #ifdef HAS_PROTO_MESSAGE_DUMP
  const char *message_name() const override { return "event_response"; }
 #endif
-  StringRef event_type_ref_{};
-  void set_event_type(const StringRef &ref) { this->event_type_ref_ = ref; }
+  StringRef event_type{};
  void encode(ProtoWriteBuffer buffer) const override;
  void calculate_size(ProtoSize &size) const override;
 #ifdef HAS_PROTO_MESSAGE_DUMP
@@ -2865,8 +2853,7 @@ class ListEntitiesValveResponse final : public InfoResponseProtoMessage {
 #ifdef HAS_PROTO_MESSAGE_DUMP
  const char *message_name() const override { return "list_entities_valve_response"; }
 #endif
-  StringRef device_class_ref_{};
-  void set_device_class(const StringRef &ref) { this->device_class_ref_ = ref; }
+  StringRef device_class{};
  bool assumed_state{false};
  bool supports_position{false};
  bool supports_stop{false};
@@ -2972,8 +2959,7 @@ class ListEntitiesUpdateResponse final : public InfoResponseProtoMessage {
 #ifdef HAS_PROTO_MESSAGE_DUMP
  const char *message_name() const override { return "list_entities_update_response"; }
 #endif
-  StringRef device_class_ref_{};
-  void set_device_class(const StringRef &ref) { this->device_class_ref_ = ref; }
+  StringRef device_class{};
  void encode(ProtoWriteBuffer buffer) const override;
  void calculate_size(ProtoSize &size) const override;
 #ifdef HAS_PROTO_MESSAGE_DUMP
@@ -2993,16 +2979,11 @@ class UpdateStateResponse final : public StateResponseProtoMessage {
  bool in_progress{false};
  bool has_progress{false};
  float progress{0.0f};
-  StringRef current_version_ref_{};
-  void set_current_version(const StringRef &ref) { this->current_version_ref_ = ref; }
-  StringRef latest_version_ref_{};
-  void set_latest_version(const StringRef &ref) { this->latest_version_ref_ = ref; }
-  StringRef title_ref_{};
-  void set_title(const StringRef &ref) { this->title_ref_ = ref; }
-  StringRef release_summary_ref_{};
-  void set_release_summary(const StringRef &ref) { this->release_summary_ref_ = ref; }
-  StringRef release_url_ref_{};
-  void set_release_url(const StringRef &ref) { this->release_url_ref_ = ref; }
+  StringRef current_version{};
+  StringRef latest_version{};
+  StringRef title{};
+  StringRef release_summary{};
+  StringRef release_url{};
  void encode(ProtoWriteBuffer buffer) const override;
  void calculate_size(ProtoSize &size) const override;
 #ifdef HAS_PROTO_MESSAGE_DUMP
--- a/esphome/components/api/api_pb2_dump.cpp
+++ b/esphome/components/api/api_pb2_dump.cpp
@@ -348,6 +348,47 @@ template<> const char *proto_enum_to_string<enums::ClimatePreset>(enums::Climate
  }
 }
 #endif
+#ifdef USE_WATER_HEATER
+template<> const char *proto_enum_to_string<enums::WaterHeaterMode>(enums::WaterHeaterMode value) {
+  switch (value) {
+    case enums::WATER_HEATER_MODE_OFF:
+      return "WATER_HEATER_MODE_OFF";
+    case enums::WATER_HEATER_MODE_ECO:
+      return "WATER_HEATER_MODE_ECO";
+    case enums::WATER_HEATER_MODE_ELECTRIC:
+      return "WATER_HEATER_MODE_ELECTRIC";
+    case enums::WATER_HEATER_MODE_PERFORMANCE:
+      return "WATER_HEATER_MODE_PERFORMANCE";
+    case enums::WATER_HEATER_MODE_HIGH_DEMAND:
+      return "WATER_HEATER_MODE_HIGH_DEMAND";
+    case enums::WATER_HEATER_MODE_HEAT_PUMP:
+      return "WATER_HEATER_MODE_HEAT_PUMP";
+    case enums::WATER_HEATER_MODE_GAS:
+      return "WATER_HEATER_MODE_GAS";
+    default:
+      return "UNKNOWN";
+  }
+}
+#endif
+template<>
+const char *proto_enum_to_string<enums::WaterHeaterCommandHasField>(enums::WaterHeaterCommandHasField value) {
+  switch (value) {
+    case enums::WATER_HEATER_COMMAND_HAS_NONE:
+      return "WATER_HEATER_COMMAND_HAS_NONE";
+    case enums::WATER_HEATER_COMMAND_HAS_MODE:
+      return "WATER_HEATER_COMMAND_HAS_MODE";
+    case enums::WATER_HEATER_COMMAND_HAS_TARGET_TEMPERATURE:
+      return "WATER_HEATER_COMMAND_HAS_TARGET_TEMPERATURE";
+    case enums::WATER_HEATER_COMMAND_HAS_STATE:
+      return "WATER_HEATER_COMMAND_HAS_STATE";
+    case enums::WATER_HEATER_COMMAND_HAS_TARGET_TEMPERATURE_LOW:
+      return "WATER_HEATER_COMMAND_HAS_TARGET_TEMPERATURE_LOW";
+    case enums::WATER_HEATER_COMMAND_HAS_TARGET_TEMPERATURE_HIGH:
+      return "WATER_HEATER_COMMAND_HAS_TARGET_TEMPERATURE_HIGH";
+    default:
+      return "UNKNOWN";
+  }
+}
 #ifdef USE_NUMBER
 template<> const char *proto_enum_to_string<enums::NumberMode>(enums::NumberMode value) {
  switch (value) {
@@ -694,9 +735,7 @@ template<> const char *proto_enum_to_string<enums::ZWaveProxyRequestType>(enums:

 void HelloRequest::dump_to(std::string &out) const {
  MessageDumpHelper helper(out, "HelloRequest");
-  out.append("  client_info: ");
-  out.append(format_hex_pretty(this->client_info, this->client_info_len));
-  out.append("\n");
+  dump_field(out, "client_info", this->client_info);
  dump_field(out, "api_version_major", this->api_version_major);
  dump_field(out, "api_version_minor", this->api_version_minor);
 }
@@ -704,21 +743,9 @@ void HelloResponse::dump_to(std::string &out) const {
  MessageDumpHelper helper(out, "HelloResponse");
  dump_field(out, "api_version_major", this->api_version_major);
  dump_field(out, "api_version_minor", this->api_version_minor);
-  dump_field(out, "server_info", this->server_info_ref_);
-  dump_field(out, "name", this->name_ref_);
+  dump_field(out, "server_info", this->server_info);
+  dump_field(out, "name", this->name);
 }
-#ifdef USE_API_PASSWORD
-void AuthenticationRequest::dump_to(std::string &out) const {
-  MessageDumpHelper helper(out, "AuthenticationRequest");
-  out.append("  password: ");
-  out.append(format_hex_pretty(this->password, this->password_len));
-  out.append("\n");
-}
-void AuthenticationResponse::dump_to(std::string &out) const {
-  MessageDumpHelper helper(out, "AuthenticationResponse");
-  dump_field(out, "invalid_password", this->invalid_password);
-}
-#endif
 void DisconnectRequest::dump_to(std::string &out) const { out.append("DisconnectRequest {}"); }
 void DisconnectResponse::dump_to(std::string &out) const { out.append("DisconnectResponse {}"); }
 void PingRequest::dump_to(std::string &out) const { out.append("PingRequest {}"); }
@@ -728,35 +755,32 @@ void DeviceInfoRequest::dump_to(std::string &out) const { out.append("DeviceInfo
 void AreaInfo::dump_to(std::string &out) const {
  MessageDumpHelper helper(out, "AreaInfo");
  dump_field(out, "area_id", this->area_id);
-  dump_field(out, "name", this->name_ref_);
+  dump_field(out, "name", this->name);
 }
 #endif
 #ifdef USE_DEVICES
 void DeviceInfo::dump_to(std::string &out) const {
  MessageDumpHelper helper(out, "DeviceInfo");
  dump_field(out, "device_id", this->device_id);
-  dump_field(out, "name", this->name_ref_);
+  dump_field(out, "name", this->name);
  dump_field(out, "area_id", this->area_id);
 }
 #endif
 void DeviceInfoResponse::dump_to(std::string &out) const {
  MessageDumpHelper helper(out, "DeviceInfoResponse");
-#ifdef USE_API_PASSWORD
-  dump_field(out, "uses_password", this->uses_password);
-#endif
-  dump_field(out, "name", this->name_ref_);
-  dump_field(out, "mac_address", this->mac_address_ref_);
-  dump_field(out, "esphome_version", this->esphome_version_ref_);
-  dump_field(out, "compilation_time", this->compilation_time_ref_);
-  dump_field(out, "model", this->model_ref_);
+  dump_field(out, "name", this->name);
+  dump_field(out, "mac_address", this->mac_address);
+  dump_field(out, "esphome_version", this->esphome_version);
+  dump_field(out, "compilation_time", this->compilation_time);
+  dump_field(out, "model", this->model);
 #ifdef USE_DEEP_SLEEP
  dump_field(out, "has_deep_sleep", this->has_deep_sleep);
 #endif
 #ifdef ESPHOME_PROJECT_NAME
-  dump_field(out, "project_name", this->project_name_ref_);
+  dump_field(out, "project_name", this->project_name);
 #endif
 #ifdef ESPHOME_PROJECT_NAME
-  dump_field(out, "project_version", this->project_version_ref_);
+  dump_field(out, "project_version", this->project_version);
 #endif
 #ifdef USE_WEBSERVER
  dump_field(out, "webserver_port", this->webserver_port);
@@ -764,16 +788,16 @@ void DeviceInfoResponse::dump_to(std::string &out) const {
 #ifdef USE_BLUETOOTH_PROXY
  dump_field(out, "bluetooth_proxy_feature_flags", this->bluetooth_proxy_feature_flags);
 #endif
-  dump_field(out, "manufacturer", this->manufacturer_ref_);
-  dump_field(out, "friendly_name", this->friendly_name_ref_);
+  dump_field(out, "manufacturer", this->manufacturer);
+  dump_field(out, "friendly_name", this->friendly_name);
 #ifdef USE_VOICE_ASSISTANT
  dump_field(out, "voice_assistant_feature_flags", this->voice_assistant_feature_flags);
 #endif
 #ifdef USE_AREAS
-  dump_field(out, "suggested_area", this->suggested_area_ref_);
+  dump_field(out, "suggested_area", this->suggested_area);
 #endif
 #ifdef USE_BLUETOOTH_PROXY
-  dump_field(out, "bluetooth_mac_address", this->bluetooth_mac_address_ref_);
+  dump_field(out, "bluetooth_mac_address", this->bluetooth_mac_address);
 #endif
 #ifdef USE_API_NOISE
  dump_field(out, "api_encryption_supported", this->api_encryption_supported);
@@ -810,14 +834,14 @@ void SubscribeStatesRequest::dump_to(std::string &out) const { out.append("Subsc
 #ifdef USE_BINARY_SENSOR
 void ListEntitiesBinarySensorResponse::dump_to(std::string &out) const {
  MessageDumpHelper helper(out, "ListEntitiesBinarySensorResponse");
-  dump_field(out, "object_id", this->object_id_ref_);
+  dump_field(out, "object_id", this->object_id);
  dump_field(out, "key", this->key);
-  dump_field(out, "name", this->name_ref_);
-  dump_field(out, "device_class", this->device_class_ref_);
+  dump_field(out, "name", this->name);
+  dump_field(out, "device_class", this->device_class);
  dump_field(out, "is_status_binary_sensor", this->is_status_binary_sensor);
  dump_field(out, "disabled_by_default", this->disabled_by_default);
 #ifdef USE_ENTITY_ICON
-  dump_field(out, "icon", this->icon_ref_);
+  dump_field(out, "icon", this->icon);
 #endif
  dump_field(out, "entity_category", static_cast<enums::EntityCategory>(this->entity_category));
 #ifdef USE_DEVICES
@@ -837,16 +861,16 @@ void BinarySensorStateResponse::dump_to(std::string &out) const {
 #ifdef USE_COVER
 void ListEntitiesCoverResponse::dump_to(std::string &out) const {
  MessageDumpHelper helper(out, "ListEntitiesCoverResponse");
-  dump_field(out, "object_id", this->object_id_ref_);
+  dump_field(out, "object_id", this->object_id);
  dump_field(out, "key", this->key);
-  dump_field(out, "name", this->name_ref_);
+  dump_field(out, "name", this->name);
  dump_field(out, "assumed_state", this->assumed_state);
  dump_field(out, "supports_position", this->supports_position);
  dump_field(out, "supports_tilt", this->supports_tilt);
-  dump_field(out, "device_class", this->device_class_ref_);
+  dump_field(out, "device_class", this->device_class);
  dump_field(out, "disabled_by_default", this->disabled_by_default);
 #ifdef USE_ENTITY_ICON
-  dump_field(out, "icon", this->icon_ref_);
+  dump_field(out, "icon", this->icon);
 #endif
  dump_field(out, "entity_category", static_cast<enums::EntityCategory>(this->entity_category));
  dump_field(out, "supports_stop", this->supports_stop);
@@ -880,16 +904,16 @@ void CoverCommandRequest::dump_to(std::string &out) const {
 #ifdef USE_FAN
 void ListEntitiesFanResponse::dump_to(std::string &out) const {
  MessageDumpHelper helper(out, "ListEntitiesFanResponse");
-  dump_field(out, "object_id", this->object_id_ref_);
+  dump_field(out, "object_id", this->object_id);
  dump_field(out, "key", this->key);
-  dump_field(out, "name", this->name_ref_);
+  dump_field(out, "name", this->name);
  dump_field(out, "supports_oscillation", this->supports_oscillation);
  dump_field(out, "supports_speed", this->supports_speed);
  dump_field(out, "supports_direction", this->supports_direction);
  dump_field(out, "supported_speed_count", this->supported_speed_count);
  dump_field(out, "disabled_by_default", this->disabled_by_default);
 #ifdef USE_ENTITY_ICON
-  dump_field(out, "icon", this->icon_ref_);
+  dump_field(out, "icon", this->icon);
 #endif
  dump_field(out, "entity_category", static_cast<enums::EntityCategory>(this->entity_category));
  for (const auto &it : *this->supported_preset_modes) {
@@ -906,7 +930,7 @@ void FanStateResponse::dump_to(std::string &out) const {
  dump_field(out, "oscillating", this->oscillating);
  dump_field(out, "direction", static_cast<enums::FanDirection>(this->direction));
  dump_field(out, "speed_level", this->speed_level);
-  dump_field(out, "preset_mode", this->preset_mode_ref_);
+  dump_field(out, "preset_mode", this->preset_mode);
 #ifdef USE_DEVICES
  dump_field(out, "device_id", this->device_id);
 #endif
@@ -932,9 +956,9 @@ void FanCommandRequest::dump_to(std::string &out) const {
 #ifdef USE_LIGHT
 void ListEntitiesLightResponse::dump_to(std::string &out) const {
  MessageDumpHelper helper(out, "ListEntitiesLightResponse");
-  dump_field(out, "object_id", this->object_id_ref_);
+  dump_field(out, "object_id", this->object_id);
  dump_field(out, "key", this->key);
-  dump_field(out, "name", this->name_ref_);
+  dump_field(out, "name", this->name);
  for (const auto &it : *this->supported_color_modes) {
    dump_field(out, "supported_color_modes", static_cast<enums::ColorMode>(it), 4);
  }
@@ -945,7 +969,7 @@ void ListEntitiesLightResponse::dump_to(std::string &out) const {
  }
  dump_field(out, "disabled_by_default", this->disabled_by_default);
 #ifdef USE_ENTITY_ICON
-  dump_field(out, "icon", this->icon_ref_);
+  dump_field(out, "icon", this->icon);
 #endif
  dump_field(out, "entity_category", static_cast<enums::EntityCategory>(this->entity_category));
 #ifdef USE_DEVICES
@@ -966,7 +990,7 @@ void LightStateResponse::dump_to(std::string &out) const {
  dump_field(out, "color_temperature", this->color_temperature);
  dump_field(out, "cold_white", this->cold_white);
  dump_field(out, "warm_white", this->warm_white);
-  dump_field(out, "effect", this->effect_ref_);
+  dump_field(out, "effect", this->effect);
 #ifdef USE_DEVICES
  dump_field(out, "device_id", this->device_id);
 #endif
@@ -999,9 +1023,7 @@ void LightCommandRequest::dump_to(std::string &out) const {
  dump_field(out, "has_flash_length", this->has_flash_length);
  dump_field(out, "flash_length", this->flash_length);
  dump_field(out, "has_effect", this->has_effect);
-  out.append("  effect: ");
-  out.append(format_hex_pretty(this->effect, this->effect_len));
-  out.append("\n");
+  dump_field(out, "effect", this->effect);
 #ifdef USE_DEVICES
  dump_field(out, "device_id", this->device_id);
 #endif
@@ -1010,16 +1032,16 @@ void LightCommandRequest::dump_to(std::string &out) const {
 #ifdef USE_SENSOR
 void ListEntitiesSensorResponse::dump_to(std::string &out) const {
  MessageDumpHelper helper(out, "ListEntitiesSensorResponse");
-  dump_field(out, "object_id", this->object_id_ref_);
+  dump_field(out, "object_id", this->object_id);
  dump_field(out, "key", this->key);
-  dump_field(out, "name", this->name_ref_);
+  dump_field(out, "name", this->name);
 #ifdef USE_ENTITY_ICON
-  dump_field(out, "icon", this->icon_ref_);
+  dump_field(out, "icon", this->icon);
 #endif
-  dump_field(out, "unit_of_measurement", this->unit_of_measurement_ref_);
+  dump_field(out, "unit_of_measurement", this->unit_of_measurement);
  dump_field(out, "accuracy_decimals", this->accuracy_decimals);
  dump_field(out, "force_update", this->force_update);
-  dump_field(out, "device_class", this->device_class_ref_);
+  dump_field(out, "device_class", this->device_class);
  dump_field(out, "state_class", static_cast<enums::SensorStateClass>(this->state_class));
  dump_field(out, "disabled_by_default", this->disabled_by_default);
  dump_field(out, "entity_category", static_cast<enums::EntityCategory>(this->entity_category));
@@ -1040,16 +1062,16 @@ void SensorStateResponse::dump_to(std::string &out) const {
 #ifdef USE_SWITCH
 void ListEntitiesSwitchResponse::dump_to(std::string &out) const {
  MessageDumpHelper helper(out, "ListEntitiesSwitchResponse");
-  dump_field(out, "object_id", this->object_id_ref_);
+  dump_field(out, "object_id", this->object_id);
  dump_field(out, "key", this->key);
-  dump_field(out, "name", this->name_ref_);
+  dump_field(out, "name", this->name);
 #ifdef USE_ENTITY_ICON
-  dump_field(out, "icon", this->icon_ref_);
+  dump_field(out, "icon", this->icon);
 #endif
  dump_field(out, "assumed_state", this->assumed_state);
  dump_field(out, "disabled_by_default", this->disabled_by_default);
  dump_field(out, "entity_category", static_cast<enums::EntityCategory>(this->entity_category));
-  dump_field(out, "device_class", this->device_class_ref_);
+  dump_field(out, "device_class", this->device_class);
 #ifdef USE_DEVICES
  dump_field(out, "device_id", this->device_id);
 #endif
@@ -1074,15 +1096,15 @@ void SwitchCommandRequest::dump_to(std::string &out) const {
 #ifdef USE_TEXT_SENSOR
 void ListEntitiesTextSensorResponse::dump_to(std::string &out) const {
  MessageDumpHelper helper(out, "ListEntitiesTextSensorResponse");
-  dump_field(out, "object_id", this->object_id_ref_);
+  dump_field(out, "object_id", this->object_id);
  dump_field(out, "key", this->key);
-  dump_field(out, "name", this->name_ref_);
+  dump_field(out, "name", this->name);
 #ifdef USE_ENTITY_ICON
-  dump_field(out, "icon", this->icon_ref_);
+  dump_field(out, "icon", this->icon);
 #endif
  dump_field(out, "disabled_by_default", this->disabled_by_default);
  dump_field(out, "entity_category", static_cast<enums::EntityCategory>(this->entity_category));
-  dump_field(out, "device_class", this->device_class_ref_);
+  dump_field(out, "device_class", this->device_class);
 #ifdef USE_DEVICES
  dump_field(out, "device_id", this->device_id);
 #endif
@@ -1090,7 +1112,7 @@ void ListEntitiesTextSensorResponse::dump_to(std::string &out) const {
 void TextSensorStateResponse::dump_to(std::string &out) const {
  MessageDumpHelper helper(out, "TextSensorStateResponse");
  dump_field(out, "key", this->key);
-  dump_field(out, "state", this->state_ref_);
+  dump_field(out, "state", this->state);
  dump_field(out, "missing_state", this->missing_state);
 #ifdef USE_DEVICES
  dump_field(out, "device_id", this->device_id);
@@ -1113,10 +1135,13 @@ void SubscribeLogsResponse::dump_to(std::string &out) const {
 void NoiseEncryptionSetKeyRequest::dump_to(std::string &out) const {
  MessageDumpHelper helper(out, "NoiseEncryptionSetKeyRequest");
  out.append("  key: ");
-  out.append(format_hex_pretty(reinterpret_cast<const uint8_t *>(this->key.data()), this->key.size()));
+  out.append(format_hex_pretty(this->key, this->key_len));
  out.append("\n");
 }
-void NoiseEncryptionSetKeyResponse::dump_to(std::string &out) const { dump_field(out, "success", this->success); }
+void NoiseEncryptionSetKeyResponse::dump_to(std::string &out) const {
+  MessageDumpHelper helper(out, "NoiseEncryptionSetKeyResponse");
+  dump_field(out, "success", this->success);
+}
 #endif
 #ifdef USE_API_HOMEASSISTANT_SERVICES
 void SubscribeHomeassistantServicesRequest::dump_to(std::string &out) const {
@@ -1124,12 +1149,12 @@ void SubscribeHomeassistantServicesRequest::dump_to(std::string &out) const {
 }
 void HomeassistantServiceMap::dump_to(std::string &out) const {
  MessageDumpHelper helper(out, "HomeassistantServiceMap");
-  dump_field(out, "key", this->key_ref_);
+  dump_field(out, "key", this->key);
  dump_field(out, "value", this->value);
 }
 void HomeassistantActionRequest::dump_to(std::string &out) const {
  MessageDumpHelper helper(out, "HomeassistantActionRequest");
-  dump_field(out, "service", this->service_ref_);
+  dump_field(out, "service", this->service);
  for (const auto &it : this->data) {
    out.append("  data: ");
    it.dump_to(out);
@@ -1176,8 +1201,8 @@ void SubscribeHomeAssistantStatesRequest::dump_to(std::string &out) const {
 }
 void SubscribeHomeAssistantStateResponse::dump_to(std::string &out) const {
  MessageDumpHelper helper(out, "SubscribeHomeAssistantStateResponse");
-  dump_field(out, "entity_id", this->entity_id_ref_);
-  dump_field(out, "attribute", this->attribute_ref_);
+  dump_field(out, "entity_id", this->entity_id);
+  dump_field(out, "attribute", this->attribute);
  dump_field(out, "once", this->once);
 }
 void HomeAssistantStateResponse::dump_to(std::string &out) const {
@@ -1191,19 +1216,17 @@ void GetTimeRequest::dump_to(std::string &out) const { out.append("GetTimeReques
 void GetTimeResponse::dump_to(std::string &out) const {
  MessageDumpHelper helper(out, "GetTimeResponse");
  dump_field(out, "epoch_seconds", this->epoch_seconds);
-  out.append("  timezone: ");
-  out.append(format_hex_pretty(this->timezone, this->timezone_len));
-  out.append("\n");
+  dump_field(out, "timezone", this->timezone);
 }
 #ifdef USE_API_USER_DEFINED_ACTIONS
 void ListEntitiesServicesArgument::dump_to(std::string &out) const {
  MessageDumpHelper helper(out, "ListEntitiesServicesArgument");
-  dump_field(out, "name", this->name_ref_);
+  dump_field(out, "name", this->name);
  dump_field(out, "type", static_cast<enums::ServiceArgType>(this->type));
 }
 void ListEntitiesServicesResponse::dump_to(std::string &out) const {
  MessageDumpHelper helper(out, "ListEntitiesServicesResponse");
-  dump_field(out, "name", this->name_ref_);
+  dump_field(out, "name", this->name);
  dump_field(out, "key", this->key);
  for (const auto &it : this->args) {
    out.append("  args: ");
@@ -1253,7 +1276,7 @@ void ExecuteServiceResponse::dump_to(std::string &out) const {
  MessageDumpHelper helper(out, "ExecuteServiceResponse");
  dump_field(out, "call_id", this->call_id);
  dump_field(out, "success", this->success);
-  dump_field(out, "error_message", this->error_message_ref_);
+  dump_field(out, "error_message", this->error_message);
 #ifdef USE_API_USER_DEFINED_ACTION_RESPONSES_JSON
  out.append("  response_data: ");
  out.append(format_hex_pretty(this->response_data, this->response_data_len));
@@ -1264,12 +1287,12 @@ void ExecuteServiceResponse::dump_to(std::string &out) const {
 #ifdef USE_CAMERA
 void ListEntitiesCameraResponse::dump_to(std::string &out) const {
  MessageDumpHelper helper(out, "ListEntitiesCameraResponse");
-  dump_field(out, "object_id", this->object_id_ref_);
+  dump_field(out, "object_id", this->object_id);
  dump_field(out, "key", this->key);
-  dump_field(out, "name", this->name_ref_);
+  dump_field(out, "name", this->name);
  dump_field(out, "disabled_by_default", this->disabled_by_default);
 #ifdef USE_ENTITY_ICON
-  dump_field(out, "icon", this->icon_ref_);
+  dump_field(out, "icon", this->icon);
 #endif
  dump_field(out, "entity_category", static_cast<enums::EntityCategory>(this->entity_category));
 #ifdef USE_DEVICES
@@ -1296,9 +1319,9 @@ void CameraImageRequest::dump_to(std::string &out) const {
 #ifdef USE_CLIMATE
 void ListEntitiesClimateResponse::dump_to(std::string &out) const {
  MessageDumpHelper helper(out, "ListEntitiesClimateResponse");
-  dump_field(out, "object_id", this->object_id_ref_);
+  dump_field(out, "object_id", this->object_id);
  dump_field(out, "key", this->key);
-  dump_field(out, "name", this->name_ref_);
+  dump_field(out, "name", this->name);
  dump_field(out, "supports_current_temperature", this->supports_current_temperature);
  dump_field(out, "supports_two_point_target_temperature", this->supports_two_point_target_temperature);
  for (const auto &it : *this->supported_modes) {
@@ -1325,7 +1348,7 @@ void ListEntitiesClimateResponse::dump_to(std::string &out) const {
  }
  dump_field(out, "disabled_by_default", this->disabled_by_default);
 #ifdef USE_ENTITY_ICON
-  dump_field(out, "icon", this->icon_ref_);
+  dump_field(out, "icon", this->icon);
 #endif
  dump_field(out, "entity_category", static_cast<enums::EntityCategory>(this->entity_category));
  dump_field(out, "visual_current_temperature_step", this->visual_current_temperature_step);
@@ -1349,9 +1372,9 @@ void ClimateStateResponse::dump_to(std::string &out) const {
  dump_field(out, "action", static_cast<enums::ClimateAction>(this->action));
  dump_field(out, "fan_mode", static_cast<enums::ClimateFanMode>(this->fan_mode));
  dump_field(out, "swing_mode", static_cast<enums::ClimateSwingMode>(this->swing_mode));
-  dump_field(out, "custom_fan_mode", this->custom_fan_mode_ref_);
+  dump_field(out, "custom_fan_mode", this->custom_fan_mode);
  dump_field(out, "preset", static_cast<enums::ClimatePreset>(this->preset));
-  dump_field(out, "custom_preset", this->custom_preset_ref_);
+  dump_field(out, "custom_preset", this->custom_preset);
  dump_field(out, "current_humidity", this->current_humidity);
  dump_field(out, "target_humidity", this->target_humidity);
 #ifdef USE_DEVICES
@@ -1386,23 +1409,72 @@ void ClimateCommandRequest::dump_to(std::string &out) const {
 #endif
 }
 #endif
+#ifdef USE_WATER_HEATER
+void ListEntitiesWaterHeaterResponse::dump_to(std::string &out) const {
+  MessageDumpHelper helper(out, "ListEntitiesWaterHeaterResponse");
+  dump_field(out, "object_id", this->object_id);
+  dump_field(out, "key", this->key);
+  dump_field(out, "name", this->name);
+#ifdef USE_ENTITY_ICON
+  dump_field(out, "icon", this->icon);
+#endif
+  dump_field(out, "disabled_by_default", this->disabled_by_default);
+  dump_field(out, "entity_category", static_cast<enums::EntityCategory>(this->entity_category));
+#ifdef USE_DEVICES
+  dump_field(out, "device_id", this->device_id);
+#endif
+  dump_field(out, "min_temperature", this->min_temperature);
+  dump_field(out, "max_temperature", this->max_temperature);
+  dump_field(out, "target_temperature_step", this->target_temperature_step);
+  for (const auto &it : *this->supported_modes) {
+    dump_field(out, "supported_modes", static_cast<enums::WaterHeaterMode>(it), 4);
+  }
+  dump_field(out, "supported_features", this->supported_features);
+}
+void WaterHeaterStateResponse::dump_to(std::string &out) const {
+  MessageDumpHelper helper(out, "WaterHeaterStateResponse");
+  dump_field(out, "key", this->key);
+  dump_field(out, "current_temperature", this->current_temperature);
+  dump_field(out, "target_temperature", this->target_temperature);
+  dump_field(out, "mode", static_cast<enums::WaterHeaterMode>(this->mode));
+#ifdef USE_DEVICES
+  dump_field(out, "device_id", this->device_id);
+#endif
+  dump_field(out, "state", this->state);
+  dump_field(out, "target_temperature_low", this->target_temperature_low);
+  dump_field(out, "target_temperature_high", this->target_temperature_high);
+}
+void WaterHeaterCommandRequest::dump_to(std::string &out) const {
+  MessageDumpHelper helper(out, "WaterHeaterCommandRequest");
+  dump_field(out, "key", this->key);
+  dump_field(out, "has_fields", this->has_fields);
+  dump_field(out, "mode", static_cast<enums::WaterHeaterMode>(this->mode));
+  dump_field(out, "target_temperature", this->target_temperature);
+#ifdef USE_DEVICES
+  dump_field(out, "device_id", this->device_id);
+#endif
+  dump_field(out, "state", this->state);
+  dump_field(out, "target_temperature_low", this->target_temperature_low);
+  dump_field(out, "target_temperature_high", this->target_temperature_high);
+}
+#endif
 #ifdef USE_NUMBER
 void ListEntitiesNumberResponse::dump_to(std::string &out) const {
  MessageDumpHelper helper(out, "ListEntitiesNumberResponse");
-  dump_field(out, "object_id", this->object_id_ref_);
+  dump_field(out, "object_id", this->object_id);
  dump_field(out, "key", this->key);
-  dump_field(out, "name", this->name_ref_);
+  dump_field(out, "name", this->name);
 #ifdef USE_ENTITY_ICON
-  dump_field(out, "icon", this->icon_ref_);
+  dump_field(out, "icon", this->icon);
 #endif
  dump_field(out, "min_value", this->min_value);
  dump_field(out, "max_value", this->max_value);
  dump_field(out, "step", this->step);
  dump_field(out, "disabled_by_default", this->disabled_by_default);
  dump_field(out, "entity_category", static_cast<enums::EntityCategory>(this->entity_category));
-  dump_field(out, "unit_of_measurement", this->unit_of_measurement_ref_);
+  dump_field(out, "unit_of_measurement", this->unit_of_measurement);
  dump_field(out, "mode", static_cast<enums::NumberMode>(this->mode));
-  dump_field(out, "device_class", this->device_class_ref_);
+  dump_field(out, "device_class", this->device_class);
 #ifdef USE_DEVICES
  dump_field(out, "device_id", this->device_id);
 #endif
@@ -1428,11 +1500,11 @@ void NumberCommandRequest::dump_to(std::string &out) const {
 #ifdef USE_SELECT
 void ListEntitiesSelectResponse::dump_to(std::string &out) const {
  MessageDumpHelper helper(out, "ListEntitiesSelectResponse");
-  dump_field(out, "object_id", this->object_id_ref_);
+  dump_field(out, "object_id", this->object_id);
  dump_field(out, "key", this->key);
-  dump_field(out, "name", this->name_ref_);
+  dump_field(out, "name", this->name);
 #ifdef USE_ENTITY_ICON
-  dump_field(out, "icon", this->icon_ref_);
+  dump_field(out, "icon", this->icon);
 #endif
  for (const auto &it : *this->options) {
    dump_field(out, "options", it, 4);
@@ -1446,7 +1518,7 @@ void ListEntitiesSelectResponse::dump_to(std::string &out) const {
 void SelectStateResponse::dump_to(std::string &out) const {
  MessageDumpHelper helper(out, "SelectStateResponse");
  dump_field(out, "key", this->key);
-  dump_field(out, "state", this->state_ref_);
+  dump_field(out, "state", this->state);
  dump_field(out, "missing_state", this->missing_state);
 #ifdef USE_DEVICES
  dump_field(out, "device_id", this->device_id);
@@ -1455,9 +1527,7 @@ void SelectStateResponse::dump_to(std::string &out) const {
 void SelectCommandRequest::dump_to(std::string &out) const {
  MessageDumpHelper helper(out, "SelectCommandRequest");
  dump_field(out, "key", this->key);
-  out.append("  state: ");
-  out.append(format_hex_pretty(this->state, this->state_len));
-  out.append("\n");
+  dump_field(out, "state", this->state);
 #ifdef USE_DEVICES
  dump_field(out, "device_id", this->device_id);
 #endif
@@ -1466,14 +1536,14 @@ void SelectCommandRequest::dump_to(std::string &out) const {
 #ifdef USE_SIREN
 void ListEntitiesSirenResponse::dump_to(std::string &out) const {
  MessageDumpHelper helper(out, "ListEntitiesSirenResponse");
-  dump_field(out, "object_id", this->object_id_ref_);
+  dump_field(out, "object_id", this->object_id);
  dump_field(out, "key", this->key);
-  dump_field(out, "name", this->name_ref_);
+  dump_field(out, "name", this->name);
 #ifdef USE_ENTITY_ICON
-  dump_field(out, "icon", this->icon_ref_);
+  dump_field(out, "icon", this->icon);
 #endif
  dump_field(out, "disabled_by_default", this->disabled_by_default);
-  for (const auto &it : this->tones) {
+  for (const auto &it : *this->tones) {
    dump_field(out, "tones", it, 4);
  }
  dump_field(out, "supports_duration", this->supports_duration);
@@ -1510,18 +1580,18 @@ void SirenCommandRequest::dump_to(std::string &out) const {
 #ifdef USE_LOCK
 void ListEntitiesLockResponse::dump_to(std::string &out) const {
  MessageDumpHelper helper(out, "ListEntitiesLockResponse");
-  dump_field(out, "object_id", this->object_id_ref_);
+  dump_field(out, "object_id", this->object_id);
  dump_field(out, "key", this->key);
-  dump_field(out, "name", this->name_ref_);
+  dump_field(out, "name", this->name);
 #ifdef USE_ENTITY_ICON
-  dump_field(out, "icon", this->icon_ref_);
+  dump_field(out, "icon", this->icon);
 #endif
  dump_field(out, "disabled_by_default", this->disabled_by_default);
  dump_field(out, "entity_category", static_cast<enums::EntityCategory>(this->entity_category));
  dump_field(out, "assumed_state", this->assumed_state);
  dump_field(out, "supports_open", this->supports_open);
  dump_field(out, "requires_code", this->requires_code);
-  dump_field(out, "code_format", this->code_format_ref_);
+  dump_field(out, "code_format", this->code_format);
 #ifdef USE_DEVICES
  dump_field(out, "device_id", this->device_id);
 #endif
@@ -1548,15 +1618,15 @@ void LockCommandRequest::dump_to(std::string &out) const {
 #ifdef USE_BUTTON
 void ListEntitiesButtonResponse::dump_to(std::string &out) const {
  MessageDumpHelper helper(out, "ListEntitiesButtonResponse");
-  dump_field(out, "object_id", this->object_id_ref_);
+  dump_field(out, "object_id", this->object_id);
  dump_field(out, "key", this->key);
-  dump_field(out, "name", this->name_ref_);
+  dump_field(out, "name", this->name);
 #ifdef USE_ENTITY_ICON
-  dump_field(out, "icon", this->icon_ref_);
+  dump_field(out, "icon", this->icon);
 #endif
  dump_field(out, "disabled_by_default", this->disabled_by_default);
  dump_field(out, "entity_category", static_cast<enums::EntityCategory>(this->entity_category));
-  dump_field(out, "device_class", this->device_class_ref_);
+  dump_field(out, "device_class", this->device_class);
 #ifdef USE_DEVICES
  dump_field(out, "device_id", this->device_id);
 #endif
@@ -1572,7 +1642,7 @@ void ButtonCommandRequest::dump_to(std::string &out) const {
 #ifdef USE_MEDIA_PLAYER
 void MediaPlayerSupportedFormat::dump_to(std::string &out) const {
  MessageDumpHelper helper(out, "MediaPlayerSupportedFormat");
-  dump_field(out, "format", this->format_ref_);
+  dump_field(out, "format", this->format);
  dump_field(out, "sample_rate", this->sample_rate);
  dump_field(out, "num_channels", this->num_channels);
  dump_field(out, "purpose", static_cast<enums::MediaPlayerFormatPurpose>(this->purpose));
@@ -1580,11 +1650,11 @@ void MediaPlayerSupportedFormat::dump_to(std::string &out) const {
 }
 void ListEntitiesMediaPlayerResponse::dump_to(std::string &out) const {
  MessageDumpHelper helper(out, "ListEntitiesMediaPlayerResponse");
-  dump_field(out, "object_id", this->object_id_ref_);
+  dump_field(out, "object_id", this->object_id);
  dump_field(out, "key", this->key);
-  dump_field(out, "name", this->name_ref_);
+  dump_field(out, "name", this->name);
 #ifdef USE_ENTITY_ICON
-  dump_field(out, "icon", this->icon_ref_);
+  dump_field(out, "icon", this->icon);
 #endif
  dump_field(out, "disabled_by_default", this->disabled_by_default);
  dump_field(out, "entity_category", static_cast<enums::EntityCategory>(this->entity_category));
@@ -1661,7 +1731,10 @@ void BluetoothDeviceConnectionResponse::dump_to(std::string &out) const {
  dump_field(out, "mtu", this->mtu);
  dump_field(out, "error", this->error);
 }
-void BluetoothGATTGetServicesRequest::dump_to(std::string &out) const { dump_field(out, "address", this->address); }
+void BluetoothGATTGetServicesRequest::dump_to(std::string &out) const {
+  MessageDumpHelper helper(out, "BluetoothGATTGetServicesRequest");
+  dump_field(out, "address", this->address);
+}
 void BluetoothGATTDescriptor::dump_to(std::string &out) const {
  MessageDumpHelper helper(out, "BluetoothGATTDescriptor");
  for (const auto &it : this->uuid) {
@@ -1833,12 +1906,12 @@ void VoiceAssistantAudioSettings::dump_to(std::string &out) const {
 void VoiceAssistantRequest::dump_to(std::string &out) const {
  MessageDumpHelper helper(out, "VoiceAssistantRequest");
  dump_field(out, "start", this->start);
-  dump_field(out, "conversation_id", this->conversation_id_ref_);
+  dump_field(out, "conversation_id", this->conversation_id);
  dump_field(out, "flags", this->flags);
  out.append("  audio_settings: ");
  this->audio_settings.dump_to(out);
  out.append("\n");
-  dump_field(out, "wake_word_phrase", this->wake_word_phrase_ref_);
+  dump_field(out, "wake_word_phrase", this->wake_word_phrase);
 }
 void VoiceAssistantResponse::dump_to(std::string &out) const {
  MessageDumpHelper helper(out, "VoiceAssistantResponse");
@@ -1862,11 +1935,7 @@ void VoiceAssistantEventResponse::dump_to(std::string &out) const {
 void VoiceAssistantAudio::dump_to(std::string &out) const {
  MessageDumpHelper helper(out, "VoiceAssistantAudio");
  out.append("  data: ");
-  if (this->data_ptr_ != nullptr) {
-    out.append(format_hex_pretty(this->data_ptr_, this->data_len_));
-  } else {
-    out.append(format_hex_pretty(reinterpret_cast<const uint8_t *>(this->data.data()), this->data.size()));
-  }
+  out.append(format_hex_pretty(this->data, this->data_len));
  out.append("\n");
  dump_field(out, "end", this->end);
 }
@@ -1886,11 +1955,14 @@ void VoiceAssistantAnnounceRequest::dump_to(std::string &out) const {
  dump_field(out, "preannounce_media_id", this->preannounce_media_id);
  dump_field(out, "start_conversation", this->start_conversation);
 }
-void VoiceAssistantAnnounceFinished::dump_to(std::string &out) const { dump_field(out, "success", this->success); }
+void VoiceAssistantAnnounceFinished::dump_to(std::string &out) const {
+  MessageDumpHelper helper(out, "VoiceAssistantAnnounceFinished");
+  dump_field(out, "success", this->success);
+}
 void VoiceAssistantWakeWord::dump_to(std::string &out) const {
  MessageDumpHelper helper(out, "VoiceAssistantWakeWord");
-  dump_field(out, "id", this->id_ref_);
-  dump_field(out, "wake_word", this->wake_word_ref_);
+  dump_field(out, "id", this->id);
+  dump_field(out, "wake_word", this->wake_word);
  for (const auto &it : this->trained_languages) {
    dump_field(out, "trained_languages", it, 4);
  }
@@ -1937,11 +2009,11 @@ void VoiceAssistantSetConfiguration::dump_to(std::string &out) const {
 #ifdef USE_ALARM_CONTROL_PANEL
 void ListEntitiesAlarmControlPanelResponse::dump_to(std::string &out) const {
  MessageDumpHelper helper(out, "ListEntitiesAlarmControlPanelResponse");
-  dump_field(out, "object_id", this->object_id_ref_);
+  dump_field(out, "object_id", this->object_id);
  dump_field(out, "key", this->key);
-  dump_field(out, "name", this->name_ref_);
+  dump_field(out, "name", this->name);
 #ifdef USE_ENTITY_ICON
-  dump_field(out, "icon", this->icon_ref_);
+  dump_field(out, "icon", this->icon);
 #endif
  dump_field(out, "disabled_by_default", this->disabled_by_default);
  dump_field(out, "entity_category", static_cast<enums::EntityCategory>(this->entity_category));
@@ -1973,17 +2045,17 @@ void AlarmControlPanelCommandRequest::dump_to(std::string &out) const {
 #ifdef USE_TEXT
 void ListEntitiesTextResponse::dump_to(std::string &out) const {
  MessageDumpHelper helper(out, "ListEntitiesTextResponse");
-  dump_field(out, "object_id", this->object_id_ref_);
+  dump_field(out, "object_id", this->object_id);
  dump_field(out, "key", this->key);
-  dump_field(out, "name", this->name_ref_);
+  dump_field(out, "name", this->name);
 #ifdef USE_ENTITY_ICON
-  dump_field(out, "icon", this->icon_ref_);
+  dump_field(out, "icon", this->icon);
 #endif
  dump_field(out, "disabled_by_default", this->disabled_by_default);
  dump_field(out, "entity_category", static_cast<enums::EntityCategory>(this->entity_category));
  dump_field(out, "min_length", this->min_length);
  dump_field(out, "max_length", this->max_length);
-  dump_field(out, "pattern", this->pattern_ref_);
+  dump_field(out, "pattern", this->pattern);
  dump_field(out, "mode", static_cast<enums::TextMode>(this->mode));
 #ifdef USE_DEVICES
  dump_field(out, "device_id", this->device_id);
@@ -1992,7 +2064,7 @@ void ListEntitiesTextResponse::dump_to(std::string &out) const {
 void TextStateResponse::dump_to(std::string &out) const {
  MessageDumpHelper helper(out, "TextStateResponse");
  dump_field(out, "key", this->key);
-  dump_field(out, "state", this->state_ref_);
+  dump_field(out, "state", this->state);
  dump_field(out, "missing_state", this->missing_state);
 #ifdef USE_DEVICES
  dump_field(out, "device_id", this->device_id);
@@ -2010,11 +2082,11 @@ void TextCommandRequest::dump_to(std::string &out) const {
 #ifdef USE_DATETIME_DATE
 void ListEntitiesDateResponse::dump_to(std::string &out) const {
  MessageDumpHelper helper(out, "ListEntitiesDateResponse");
-  dump_field(out, "object_id", this->object_id_ref_);
+  dump_field(out, "object_id", this->object_id);
  dump_field(out, "key", this->key);
-  dump_field(out, "name", this->name_ref_);
+  dump_field(out, "name", this->name);
 #ifdef USE_ENTITY_ICON
-  dump_field(out, "icon", this->icon_ref_);
+  dump_field(out, "icon", this->icon);
 #endif
  dump_field(out, "disabled_by_default", this->disabled_by_default);
  dump_field(out, "entity_category", static_cast<enums::EntityCategory>(this->entity_category));
@@ -2047,11 +2119,11 @@ void DateCommandRequest::dump_to(std::string &out) const {
 #ifdef USE_DATETIME_TIME
 void ListEntitiesTimeResponse::dump_to(std::string &out) const {
  MessageDumpHelper helper(out, "ListEntitiesTimeResponse");
-  dump_field(out, "object_id", this->object_id_ref_);
+  dump_field(out, "object_id", this->object_id);
  dump_field(out, "key", this->key);
-  dump_field(out, "name", this->name_ref_);
+  dump_field(out, "name", this->name);
 #ifdef USE_ENTITY_ICON
-  dump_field(out, "icon", this->icon_ref_);
+  dump_field(out, "icon", this->icon);
 #endif
  dump_field(out, "disabled_by_default", this->disabled_by_default);
  dump_field(out, "entity_category", static_cast<enums::EntityCategory>(this->entity_category));
@@ -2084,15 +2156,15 @@ void TimeCommandRequest::dump_to(std::string &out) const {
 #ifdef USE_EVENT
 void ListEntitiesEventResponse::dump_to(std::string &out) const {
  MessageDumpHelper helper(out, "ListEntitiesEventResponse");
-  dump_field(out, "object_id", this->object_id_ref_);
+  dump_field(out, "object_id", this->object_id);
  dump_field(out, "key", this->key);
-  dump_field(out, "name", this->name_ref_);
+  dump_field(out, "name", this->name);
 #ifdef USE_ENTITY_ICON
-  dump_field(out, "icon", this->icon_ref_);
+  dump_field(out, "icon", this->icon);
 #endif
  dump_field(out, "disabled_by_default", this->disabled_by_default);
  dump_field(out, "entity_category", static_cast<enums::EntityCategory>(this->entity_category));
-  dump_field(out, "device_class", this->device_class_ref_);
+  dump_field(out, "device_class", this->device_class);
  for (const auto &it : *this->event_types) {
    dump_field(out, "event_types", it, 4);
  }
@@ -2103,7 +2175,7 @@ void ListEntitiesEventResponse::dump_to(std::string &out) const {
 void EventResponse::dump_to(std::string &out) const {
  MessageDumpHelper helper(out, "EventResponse");
  dump_field(out, "key", this->key);
-  dump_field(out, "event_type", this->event_type_ref_);
+  dump_field(out, "event_type", this->event_type);
 #ifdef USE_DEVICES
  dump_field(out, "device_id", this->device_id);
 #endif
@@ -2112,15 +2184,15 @@ void EventResponse::dump_to(std::string &out) const {
 #ifdef USE_VALVE
 void ListEntitiesValveResponse::dump_to(std::string &out) const {
  MessageDumpHelper helper(out, "ListEntitiesValveResponse");
-  dump_field(out, "object_id", this->object_id_ref_);
+  dump_field(out, "object_id", this->object_id);
  dump_field(out, "key", this->key);
-  dump_field(out, "name", this->name_ref_);
+  dump_field(out, "name", this->name);
 #ifdef USE_ENTITY_ICON
-  dump_field(out, "icon", this->icon_ref_);
+  dump_field(out, "icon", this->icon);
 #endif
  dump_field(out, "disabled_by_default", this->disabled_by_default);
  dump_field(out, "entity_category", static_cast<enums::EntityCategory>(this->entity_category));
-  dump_field(out, "device_class", this->device_class_ref_);
+  dump_field(out, "device_class", this->device_class);
  dump_field(out, "assumed_state", this->assumed_state);
  dump_field(out, "supports_position", this->supports_position);
  dump_field(out, "supports_stop", this->supports_stop);
@@ -2151,11 +2223,11 @@ void ValveCommandRequest::dump_to(std::string &out) const {
 #ifdef USE_DATETIME_DATETIME
 void ListEntitiesDateTimeResponse::dump_to(std::string &out) const {
  MessageDumpHelper helper(out, "ListEntitiesDateTimeResponse");
-  dump_field(out, "object_id", this->object_id_ref_);
+  dump_field(out, "object_id", this->object_id);
  dump_field(out, "key", this->key);
-  dump_field(out, "name", this->name_ref_);
+  dump_field(out, "name", this->name);
 #ifdef USE_ENTITY_ICON
-  dump_field(out, "icon", this->icon_ref_);
+  dump_field(out, "icon", this->icon);
 #endif
  dump_field(out, "disabled_by_default", this->disabled_by_default);
  dump_field(out, "entity_category", static_cast<enums::EntityCategory>(this->entity_category));
@@ -2184,15 +2256,15 @@ void DateTimeCommandRequest::dump_to(std::string &out) const {
 #ifdef USE_UPDATE
 void ListEntitiesUpdateResponse::dump_to(std::string &out) const {
  MessageDumpHelper helper(out, "ListEntitiesUpdateResponse");
-  dump_field(out, "object_id", this->object_id_ref_);
+  dump_field(out, "object_id", this->object_id);
  dump_field(out, "key", this->key);
-  dump_field(out, "name", this->name_ref_);
+  dump_field(out, "name", this->name);
 #ifdef USE_ENTITY_ICON
-  dump_field(out, "icon", this->icon_ref_);
+  dump_field(out, "icon", this->icon);
 #endif
  dump_field(out, "disabled_by_default", this->disabled_by_default);
  dump_field(out, "entity_category", static_cast<enums::EntityCategory>(this->entity_category));
-  dump_field(out, "device_class", this->device_class_ref_);
+  dump_field(out, "device_class", this->device_class);
 #ifdef USE_DEVICES
  dump_field(out, "device_id", this->device_id);
 #endif
@@ -2204,11 +2276,11 @@ void UpdateStateResponse::dump_to(std::string &out) const {
  dump_field(out, "in_progress", this->in_progress);
  dump_field(out, "has_progress", this->has_progress);
  dump_field(out, "progress", this->progress);
-  dump_field(out, "current_version", this->current_version_ref_);
-  dump_field(out, "latest_version", this->latest_version_ref_);
-  dump_field(out, "title", this->title_ref_);
-  dump_field(out, "release_summary", this->release_summary_ref_);
-  dump_field(out, "release_url", this->release_url_ref_);
+  dump_field(out, "current_version", this->current_version);
+  dump_field(out, "latest_version", this->latest_version);
+  dump_field(out, "title", this->title);
+  dump_field(out, "release_summary", this->release_summary);
+  dump_field(out, "release_url", this->release_url);
 #ifdef USE_DEVICES
  dump_field(out, "device_id", this->device_id);
 #endif
--- a/esphome/components/api/api_pb2_includes.h
+++ b/esphome/components/api/api_pb2_includes.h
@@ -10,6 +10,10 @@
 #include "esphome/components/climate/climate_traits.h"
 #endif

+#ifdef USE_WATER_HEATER
+#include "esphome/components/water_heater/water_heater.h"
+#endif
+
 #ifdef USE_LIGHT
 #include "esphome/components/light/light_traits.h"
 #endif
--- a/esphome/components/api/api_pb2_service.cpp
+++ b/esphome/components/api/api_pb2_service.cpp
@@ -24,17 +24,6 @@ void APIServerConnectionBase::read_message(uint32_t msg_size, uint32_t msg_type,
      this->on_hello_request(msg);
      break;
    }
-#ifdef USE_API_PASSWORD
-    case AuthenticationRequest::MESSAGE_TYPE: {
-      AuthenticationRequest msg;
-      msg.decode(msg_data, msg_size);
-#ifdef HAS_PROTO_MESSAGE_DUMP
-      ESP_LOGVV(TAG, "on_authentication_request: %s", msg.dump().c_str());
-#endif
-      this->on_authentication_request(msg);
-      break;
-    }
-#endif
    case DisconnectRequest::MESSAGE_TYPE: {
      DisconnectRequest msg;
      // Empty message: no decode needed
@@ -621,6 +610,17 @@ void APIServerConnectionBase::read_message(uint32_t msg_size, uint32_t msg_type,
      this->on_homeassistant_action_response(msg);
      break;
    }
+#endif
+#ifdef USE_WATER_HEATER
+    case WaterHeaterCommandRequest::MESSAGE_TYPE: {
+      WaterHeaterCommandRequest msg;
+      msg.decode(msg_data, msg_size);
+#ifdef HAS_PROTO_MESSAGE_DUMP
+      ESP_LOGVV(TAG, "on_water_heater_command_request: %s", msg.dump().c_str());
+#endif
+      this->on_water_heater_command_request(msg);
+      break;
+    }
 #endif
    default:
      break;
@@ -632,13 +632,6 @@ void APIServerConnection::on_hello_request(const HelloRequest &msg) {
    this->on_fatal_error();
  }
 }
-#ifdef USE_API_PASSWORD
-void APIServerConnection::on_authentication_request(const AuthenticationRequest &msg) {
-  if (!this->send_authenticate_response(msg)) {
-    this->on_fatal_error();
-  }
-}
-#endif
 void APIServerConnection::on_disconnect_request(const DisconnectRequest &msg) {
  if (!this->send_disconnect_response(msg)) {
    this->on_fatal_error();
@@ -830,10 +823,7 @@ void APIServerConnection::on_z_wave_proxy_request(const ZWaveProxyRequest &msg)
 void APIServerConnection::read_message(uint32_t msg_size, uint32_t msg_type, const uint8_t *msg_data) {
  // Check authentication/connection requirements for messages
  switch (msg_type) {
-    case HelloRequest::MESSAGE_TYPE:  // No setup required
-#ifdef USE_API_PASSWORD
-    case AuthenticationRequest::MESSAGE_TYPE:  // No setup required
-#endif
+    case HelloRequest::MESSAGE_TYPE:       // No setup required
    case DisconnectRequest::MESSAGE_TYPE:  // No setup required
    case PingRequest::MESSAGE_TYPE:        // No setup required
      break;                               // Skip all checks for these messages
--- a/esphome/components/api/api_pb2_service.h
+++ b/esphome/components/api/api_pb2_service.h
@@ -26,10 +26,6 @@ class APIServerConnectionBase : public ProtoService {

  virtual void on_hello_request(const HelloRequest &value){};

-#ifdef USE_API_PASSWORD
-  virtual void on_authentication_request(const AuthenticationRequest &value){};
-#endif
-
  virtual void on_disconnect_request(const DisconnectRequest &value){};
  virtual void on_disconnect_response(const DisconnectResponse &value){};
  virtual void on_ping_request(const PingRequest &value){};
@@ -91,6 +87,10 @@ class APIServerConnectionBase : public ProtoService {
  virtual void on_climate_command_request(const ClimateCommandRequest &value){};
 #endif

+#ifdef USE_WATER_HEATER
+  virtual void on_water_heater_command_request(const WaterHeaterCommandRequest &value){};
+#endif
+
 #ifdef USE_NUMBER
  virtual void on_number_command_request(const NumberCommandRequest &value){};
 #endif
@@ -224,9 +224,6 @@ class APIServerConnectionBase : public ProtoService {
 class APIServerConnection : public APIServerConnectionBase {
 public:
  virtual bool send_hello_response(const HelloRequest &msg) = 0;
-#ifdef USE_API_PASSWORD
-  virtual bool send_authenticate_response(const AuthenticationRequest &msg) = 0;
-#endif
  virtual bool send_disconnect_response(const DisconnectRequest &msg) = 0;
  virtual bool send_ping_response(const PingRequest &msg) = 0;
  virtual bool send_device_info_response(const DeviceInfoRequest &msg) = 0;
@@ -353,9 +350,6 @@ class APIServerConnection : public APIServerConnectionBase {
 #endif
 protected:
  void on_hello_request(const HelloRequest &msg) override;
-#ifdef USE_API_PASSWORD
-  void on_authentication_request(const AuthenticationRequest &msg) override;
-#endif
  void on_disconnect_request(const DisconnectRequest &msg) override;
  void on_ping_request(const PingRequest &msg) override;
  void on_device_info_request(const DeviceInfoRequest &msg) override;
--- a/esphome/components/api/api_server.cpp
+++ b/esphome/components/api/api_server.cpp
@@ -125,15 +125,18 @@ void APIServer::loop() {
      if (!sock)
        break;

+      char peername[socket::SOCKADDR_STR_LEN];
+      sock->getpeername_to(peername);
+
      // Check if we're at the connection limit
      if (this->clients_.size() >= this->max_connections_) {
-        ESP_LOGW(TAG, "Max connections (%d), rejecting %s", this->max_connections_, sock->getpeername().c_str());
+        ESP_LOGW(TAG, "Max connections (%d), rejecting %s", this->max_connections_, peername);
        // Immediately close - socket destructor will handle cleanup
        sock.reset();
        continue;
      }

-      ESP_LOGD(TAG, "Accept %s", sock->getpeername().c_str());
+      ESP_LOGD(TAG, "Accept %s", peername);

      auto *conn = new APIConnection(std::move(sock), this);
      this->clients_.emplace_back(conn);
@@ -166,8 +169,7 @@ void APIServer::loop() {
    // Network is down - disconnect all clients
    for (auto &client : this->clients_) {
      client->on_fatal_error();
-      ESP_LOGW(TAG, "%s (%s): Network down; disconnect", client->client_info_.name.c_str(),
-               client->client_info_.peername.c_str());
+      client->log_client_(ESPHOME_LOG_LEVEL_WARN, LOG_STR("Network down; disconnect"));
    }
    // Continue to process and clean up the clients below
  }
@@ -185,12 +187,12 @@ void APIServer::loop() {

    // Rare case: handle disconnection
 #ifdef USE_API_CLIENT_DISCONNECTED_TRIGGER
-    this->client_disconnected_trigger_->trigger(client->client_info_.name, client->client_info_.peername);
+    this->client_disconnected_trigger_->trigger(std::string(client->get_name()), std::string(client->get_peername()));
 #endif
 #ifdef USE_API_USER_DEFINED_ACTION_RESPONSES
    this->unregister_active_action_calls_for_connection(client.get());
 #endif
-    ESP_LOGV(TAG, "Remove connection %s", client->client_info_.name.c_str());
+    ESP_LOGV(TAG, "Remove connection %s", client->get_name());

    // Swap with the last element and pop (avoids expensive vector shifts)
    if (client_index < this->clients_.size() - 1) {
@@ -224,38 +226,6 @@ void APIServer::dump_config() {
 #endif
 }

-#ifdef USE_API_PASSWORD
-bool APIServer::check_password(const uint8_t *password_data, size_t password_len) const {
-  // depend only on input password length
-  const char *a = this->password_.c_str();
-  uint32_t len_a = this->password_.length();
-  const char *b = reinterpret_cast<const char *>(password_data);
-  uint32_t len_b = password_len;
-
-  // disable optimization with volatile
-  volatile uint32_t length = len_b;
-  volatile const char *left = nullptr;
-  volatile const char *right = b;
-  uint8_t result = 0;
-
-  if (len_a == length) {
-    left = *((volatile const char **) &a);
-    result = 0;
-  }
-  if (len_a != length) {
-    left = b;
-    result = 1;
-  }
-
-  for (size_t i = 0; i < length; i++) {
-    result |= *left++ ^ *right++;  // NOLINT
-  }
-
-  return result == 0;
-}
-
-#endif
-
 void APIServer::handle_disconnect(APIConnection *conn) {}

 // Macro for controller update dispatch
@@ -335,6 +305,10 @@ API_DISPATCH_UPDATE(valve::Valve, valve)
 API_DISPATCH_UPDATE(media_player::MediaPlayer, media_player)
 #endif

+#ifdef USE_WATER_HEATER
+API_DISPATCH_UPDATE(water_heater::WaterHeater, water_heater)
+#endif
+
 #ifdef USE_EVENT
 // Event is a special case - unlike other entities with simple state fields,
 // events store their state in a member accessed via obj->get_last_event_type()
@@ -373,10 +347,6 @@ float APIServer::get_setup_priority() const { return setup_priority::AFTER_WIFI;

 void APIServer::set_port(uint16_t port) { this->port_ = port; }

-#ifdef USE_API_PASSWORD
-void APIServer::set_password(const std::string &password) { this->password_ = password; }
-#endif
-
 void APIServer::set_batch_delay(uint16_t batch_delay) { this->batch_delay_ = batch_delay; }

 #ifdef USE_API_HOMEASSISTANT_SERVICES
@@ -390,7 +360,7 @@ void APIServer::register_action_response_callback(uint32_t call_id, ActionRespon
  this->action_response_callbacks_.push_back({call_id, std::move(callback)});
 }

-void APIServer::handle_action_response(uint32_t call_id, bool success, const std::string &error_message) {
+void APIServer::handle_action_response(uint32_t call_id, bool success, StringRef error_message) {
  for (auto it = this->action_response_callbacks_.begin(); it != this->action_response_callbacks_.end(); ++it) {
    if (it->call_id == call_id) {
      auto callback = std::move(it->callback);
@@ -402,7 +372,7 @@ void APIServer::handle_action_response(uint32_t call_id, bool success, const std
  }
 }
 #ifdef USE_API_HOMEASSISTANT_ACTION_RESPONSES_JSON
-void APIServer::handle_action_response(uint32_t call_id, bool success, const std::string &error_message,
+void APIServer::handle_action_response(uint32_t call_id, bool success, StringRef error_message,
                                       const uint8_t *response_data, size_t response_data_len) {
  for (auto it = this->action_response_callbacks_.begin(); it != this->action_response_callbacks_.end(); ++it) {
    if (it->call_id == call_id) {
@@ -420,8 +390,8 @@ void APIServer::handle_action_response(uint32_t call_id, bool success, const std

 #ifdef USE_API_HOMEASSISTANT_STATES
 // Helper to add subscription (reduces duplication)
-void APIServer::add_state_subscription_(const char *entity_id, const char *attribute,
-                                        std::function<void(std::string)> f, bool once) {
+void APIServer::add_state_subscription_(const char *entity_id, const char *attribute, std::function<void(StringRef)> f,
+                                        bool once) {
  this->state_subs_.push_back(HomeAssistantStateSubscription{
      .entity_id = entity_id, .attribute = attribute, .callback = std::move(f), .once = once,
      // entity_id_dynamic_storage and attribute_dynamic_storage remain nullptr (no heap allocation)
@@ -430,7 +400,7 @@ void APIServer::add_state_subscription_(const char *entity_id, const char *attri

 // Helper to add subscription with heap-allocated strings (reduces duplication)
 void APIServer::add_state_subscription_(std::string entity_id, optional<std::string> attribute,
-                                        std::function<void(std::string)> f, bool once) {
+                                        std::function<void(StringRef)> f, bool once) {
  HomeAssistantStateSubscription sub;
  // Allocate heap storage for the strings
  sub.entity_id_dynamic_storage = std::make_unique<std::string>(std::move(entity_id));
@@ -450,23 +420,43 @@ void APIServer::add_state_subscription_(std::string entity_id, optional<std::str

 // New const char* overload (for internal components - zero allocation)
 void APIServer::subscribe_home_assistant_state(const char *entity_id, const char *attribute,
-                                               std::function<void(std::string)> f) {
+                                               std::function<void(StringRef)> f) {
  this->add_state_subscription_(entity_id, attribute, std::move(f), false);
 }

 void APIServer::get_home_assistant_state(const char *entity_id, const char *attribute,
-                                         std::function<void(std::string)> f) {
+                                         std::function<void(StringRef)> f) {
  this->add_state_subscription_(entity_id, attribute, std::move(f), true);
 }

-// Existing std::string overload (for custom_api_device.h - heap allocation)
+// std::string overload with StringRef callback (zero-allocation callback)
 void APIServer::subscribe_home_assistant_state(std::string entity_id, optional<std::string> attribute,
-                                               std::function<void(std::string)> f) {
+                                               std::function<void(StringRef)> f) {
  this->add_state_subscription_(std::move(entity_id), std::move(attribute), std::move(f), false);
 }

 void APIServer::get_home_assistant_state(std::string entity_id, optional<std::string> attribute,
-                                         std::function<void(std::string)> f) {
+                                         std::function<void(StringRef)> f) {
+  this->add_state_subscription_(std::move(entity_id), std::move(attribute), std::move(f), true);
+}
+
+// Legacy helper: wraps std::string callback and delegates to StringRef version
+void APIServer::add_state_subscription_(std::string entity_id, optional<std::string> attribute,
+                                        std::function<void(const std::string &)> f, bool once) {
+  // Wrap callback to convert StringRef -> std::string, then delegate
+  this->add_state_subscription_(std::move(entity_id), std::move(attribute),
+                                std::function<void(StringRef)>([f = std::move(f)](StringRef state) { f(state.str()); }),
+                                once);
+}
+
+// Legacy std::string overload (for custom_api_device.h - converts StringRef to std::string)
+void APIServer::subscribe_home_assistant_state(std::string entity_id, optional<std::string> attribute,
+                                               std::function<void(const std::string &)> f) {
+  this->add_state_subscription_(std::move(entity_id), std::move(attribute), std::move(f), false);
+}
+
+void APIServer::get_home_assistant_state(std::string entity_id, optional<std::string> attribute,
+                                         std::function<void(const std::string &)> f) {
  this->add_state_subscription_(std::move(entity_id), std::move(attribute), std::move(f), true);
 }

@@ -674,7 +664,7 @@ void APIServer::unregister_active_action_calls_for_connection(APIConnection *con
  }
 }

-void APIServer::send_action_response(uint32_t action_call_id, bool success, const std::string &error_message) {
+void APIServer::send_action_response(uint32_t action_call_id, bool success, StringRef error_message) {
  for (auto &call : this->active_action_calls_) {
    if (call.action_call_id == action_call_id) {
      call.connection->send_execute_service_response(call.client_call_id, success, error_message);
@@ -684,7 +674,7 @@ void APIServer::send_action_response(uint32_t action_call_id, bool success, cons
  ESP_LOGW(TAG, "Cannot send response: no active call found for action_call_id %u", action_call_id);
 }
 #ifdef USE_API_USER_DEFINED_ACTION_RESPONSES_JSON
-void APIServer::send_action_response(uint32_t action_call_id, bool success, const std::string &error_message,
+void APIServer::send_action_response(uint32_t action_call_id, bool success, StringRef error_message,
                                     const uint8_t *response_data, size_t response_data_len) {
  for (auto &call : this->active_action_calls_) {
    if (call.action_call_id == action_call_id) {
--- a/esphome/components/api/api_server.h
+++ b/esphome/components/api/api_server.h
@@ -10,6 +10,7 @@
 #include "esphome/core/component.h"
 #include "esphome/core/controller.h"
 #include "esphome/core/log.h"
+#include "esphome/core/string_ref.h"
 #include "list_entities.h"
 #include "subscribe_state.h"
 #ifdef USE_LOGGER
@@ -59,10 +60,6 @@ class APIServer : public Component,
 #endif
 #ifdef USE_CAMERA
  void on_camera_image(const std::shared_ptr<camera::CameraImage> &image) override;
-#endif
-#ifdef USE_API_PASSWORD
-  bool check_password(const uint8_t *password_data, size_t password_len) const;
-  void set_password(const std::string &password);
 #endif
  void set_port(uint16_t port);
  void set_reboot_timeout(uint32_t reboot_timeout);
@@ -133,6 +130,9 @@ class APIServer : public Component,
 #ifdef USE_MEDIA_PLAYER
  void on_media_player_update(media_player::MediaPlayer *obj) override;
 #endif
+#ifdef USE_WATER_HEATER
+  void on_water_heater_update(water_heater::WaterHeater *obj) override;
+#endif
 #ifdef USE_API_HOMEASSISTANT_SERVICES
  void send_homeassistant_action(const HomeassistantActionRequest &call);

@@ -140,10 +140,10 @@ class APIServer : public Component,
  // Action response handling
  using ActionResponseCallback = std::function<void(const class ActionResponse &)>;
  void register_action_response_callback(uint32_t call_id, ActionResponseCallback callback);
-  void handle_action_response(uint32_t call_id, bool success, const std::string &error_message);
+  void handle_action_response(uint32_t call_id, bool success, StringRef error_message);
 #ifdef USE_API_HOMEASSISTANT_ACTION_RESPONSES_JSON
-  void handle_action_response(uint32_t call_id, bool success, const std::string &error_message,
-                              const uint8_t *response_data, size_t response_data_len);
+  void handle_action_response(uint32_t call_id, bool success, StringRef error_message, const uint8_t *response_data,
+                              size_t response_data_len);
 #endif  // USE_API_HOMEASSISTANT_ACTION_RESPONSES_JSON
 #endif  // USE_API_HOMEASSISTANT_ACTION_RESPONSES
 #endif  // USE_API_HOMEASSISTANT_SERVICES
@@ -162,9 +162,9 @@ class APIServer : public Component,
  void unregister_active_action_call(uint32_t action_call_id);
  void unregister_active_action_calls_for_connection(APIConnection *conn);
  // Send response for a specific action call (uses action_call_id, sends client_call_id in response)
-  void send_action_response(uint32_t action_call_id, bool success, const std::string &error_message);
+  void send_action_response(uint32_t action_call_id, bool success, StringRef error_message);
 #ifdef USE_API_USER_DEFINED_ACTION_RESPONSES_JSON
-  void send_action_response(uint32_t action_call_id, bool success, const std::string &error_message,
+  void send_action_response(uint32_t action_call_id, bool success, StringRef error_message,
                            const uint8_t *response_data, size_t response_data_len);
 #endif  // USE_API_USER_DEFINED_ACTION_RESPONSES_JSON
 #endif  // USE_API_USER_DEFINED_ACTION_RESPONSES
@@ -192,7 +192,7 @@ class APIServer : public Component,
  struct HomeAssistantStateSubscription {
    const char *entity_id;  // Pointer to flash (internal) or heap (external)
    const char *attribute;  // Pointer to flash or nullptr (nullptr means no attribute)
-    std::function<void(std::string)> callback;
+    std::function<void(StringRef)> callback;
    bool once;

    // Dynamic storage for external components using std::string API (custom_api_device.h)
@@ -202,14 +202,20 @@ class APIServer : public Component,
  };

  // New const char* overload (for internal components - zero allocation)
-  void subscribe_home_assistant_state(const char *entity_id, const char *attribute, std::function<void(std::string)> f);
-  void get_home_assistant_state(const char *entity_id, const char *attribute, std::function<void(std::string)> f);
+  void subscribe_home_assistant_state(const char *entity_id, const char *attribute, std::function<void(StringRef)> f);
+  void get_home_assistant_state(const char *entity_id, const char *attribute, std::function<void(StringRef)> f);

-  // Existing std::string overload (for custom_api_device.h - heap allocation)
+  // std::string overload with StringRef callback (for custom_api_device.h with zero-allocation callback)
  void subscribe_home_assistant_state(std::string entity_id, optional<std::string> attribute,
-                                      std::function<void(std::string)> f);
+                                      std::function<void(StringRef)> f);
  void get_home_assistant_state(std::string entity_id, optional<std::string> attribute,
-                                std::function<void(std::string)> f);
+                                std::function<void(StringRef)> f);
+
+  // Legacy std::string overload (for custom_api_device.h - converts StringRef to std::string for callback)
+  void subscribe_home_assistant_state(std::string entity_id, optional<std::string> attribute,
+                                      std::function<void(const std::string &)> f);
+  void get_home_assistant_state(std::string entity_id, optional<std::string> attribute,
+                                std::function<void(const std::string &)> f);

  const std::vector<HomeAssistantStateSubscription> &get_state_subs() const;
 #endif
@@ -233,10 +239,13 @@ class APIServer : public Component,
 #endif  // USE_API_NOISE
 #ifdef USE_API_HOMEASSISTANT_STATES
  // Helper methods to reduce code duplication
-  void add_state_subscription_(const char *entity_id, const char *attribute, std::function<void(std::string)> f,
+  void add_state_subscription_(const char *entity_id, const char *attribute, std::function<void(StringRef)> f,
                               bool once);
+  void add_state_subscription_(std::string entity_id, optional<std::string> attribute, std::function<void(StringRef)> f,
+                               bool once);
+  // Legacy helper: wraps std::string callback and delegates to StringRef version
  void add_state_subscription_(std::string entity_id, optional<std::string> attribute,
-                               std::function<void(std::string)> f, bool once);
+                               std::function<void(const std::string &)> f, bool once);
 #endif  // USE_API_HOMEASSISTANT_STATES
  // Pointers and pointer-like types first (4 bytes each)
  std::unique_ptr<socket::Socket> socket_ = nullptr;
@@ -253,9 +262,6 @@ class APIServer : public Component,

  // Vectors and strings (12 bytes each on 32-bit)
  std::vector<std::unique_ptr<APIConnection>> clients_;
-#ifdef USE_API_PASSWORD
-  std::string password_;
-#endif
  std::vector<uint8_t> shared_write_buffer_;  // Shared proto write buffer for all connections
 #ifdef USE_API_HOMEASSISTANT_STATES
  std::vector<HomeAssistantStateSubscription> state_subs_;
--- a/esphome/components/api/client.py
+++ b/esphome/components/api/client.py
@@ -16,7 +16,7 @@ with warnings.catch_warnings():

 import contextlib

-from esphome.const import CONF_KEY, CONF_PASSWORD, CONF_PORT, __version__
+from esphome.const import CONF_KEY, CONF_PORT, __version__
 from esphome.core import CORE

 from . import CONF_ENCRYPTION
@@ -35,7 +35,6 @@ async def async_run_logs(config: dict[str, Any], addresses: list[str]) -> None:
    conf = config["api"]
    name = config["esphome"]["name"]
    port: int = int(conf[CONF_PORT])
-    password: str = conf[CONF_PASSWORD]
    noise_psk: str | None = None
    if (encryption := conf.get(CONF_ENCRYPTION)) and (key := encryption.get(CONF_KEY)):
        noise_psk = key
@@ -50,7 +49,7 @@ async def async_run_logs(config: dict[str, Any], addresses: list[str]) -> None:
    cli = APIClient(
        addresses[0],  # Primary address for compatibility
        port,
-        password,
+        "",  # Password auth removed in 2026.1.0
        client_info=f"ESPHome Logs {__version__}",
        noise_psk=noise_psk,
        addresses=addresses,  # Pass all addresses for automatic retry
--- a/esphome/components/api/custom_api_device.h
+++ b/esphome/components/api/custom_api_device.h
@@ -122,21 +122,36 @@ class CustomAPIDevice {
   *   subscribe_homeassistant_state(&CustomNativeAPI::on_state_changed, "climate.kitchen", "current_temperature");
   * }
   *
-   * void on_state_changed(std::string state) {
-   *   // State of sensor.weather_forecast is `state`
+   * void on_state_changed(StringRef state) {
+   *   // State of climate.kitchen current_temperature is `state`
+   *   // Use state.c_str() for C string, state.str() for std::string
   * }
   * ```
   *
   * @tparam T The class type creating the service, automatically deduced from the function pointer.
-   * @param callback The member function to call when the entity state changes.
+   * @param callback The member function to call when the entity state changes (zero-allocation).
   * @param entity_id The entity_id to track.
   * @param attribute The entity state attribute to track.
   */
  template<typename T>
+  void subscribe_homeassistant_state(void (T::*callback)(StringRef), const std::string &entity_id,
+                                     const std::string &attribute = "") {
+    auto f = std::bind(callback, (T *) this, std::placeholders::_1);
+    global_api_server->subscribe_home_assistant_state(entity_id, optional<std::string>(attribute), std::move(f));
+  }
+
+  /** Subscribe to the state (or attribute state) of an entity from Home Assistant (legacy std::string version).
+   *
+   * @deprecated Use the StringRef overload for zero-allocation callbacks. Will be removed in 2027.1.0.
+   */
+  template<typename T>
+  ESPDEPRECATED("Use void callback(StringRef) instead. Will be removed in 2027.1.0.", "2026.1.0")
  void subscribe_homeassistant_state(void (T::*callback)(std::string), const std::string &entity_id,
                                     const std::string &attribute = "") {
    auto f = std::bind(callback, (T *) this, std::placeholders::_1);
-    global_api_server->subscribe_home_assistant_state(entity_id, optional<std::string>(attribute), f);
+    // Explicit type to disambiguate overload resolution
+    global_api_server->subscribe_home_assistant_state(entity_id, optional<std::string>(attribute),
+                                                      std::function<void(const std::string &)>(f));
  }

  /** Subscribe to the state (or attribute state) of an entity from Home Assistant.
@@ -148,23 +163,45 @@ class CustomAPIDevice {
   *   subscribe_homeassistant_state(&CustomNativeAPI::on_state_changed, "sensor.weather_forecast");
   * }
   *
-   * void on_state_changed(std::string entity_id, std::string state) {
+   * void on_state_changed(const std::string &entity_id, StringRef state) {
   *   // State of `entity_id` is `state`
   * }
   * ```
   *
   * @tparam T The class type creating the service, automatically deduced from the function pointer.
-   * @param callback The member function to call when the entity state changes.
+   * @param callback The member function to call when the entity state changes (zero-allocation for state).
   * @param entity_id The entity_id to track.
   * @param attribute The entity state attribute to track.
   */
  template<typename T>
+  void subscribe_homeassistant_state(void (T::*callback)(const std::string &, StringRef), const std::string &entity_id,
+                                     const std::string &attribute = "") {
+    auto f = std::bind(callback, (T *) this, entity_id, std::placeholders::_1);
+    global_api_server->subscribe_home_assistant_state(entity_id, optional<std::string>(attribute), std::move(f));
+  }
+
+  /** Subscribe to the state (or attribute state) of an entity from Home Assistant (legacy std::string version).
+   *
+   * @deprecated Use the StringRef overload for zero-allocation callbacks. Will be removed in 2027.1.0.
+   */
+  template<typename T>
+  ESPDEPRECATED("Use void callback(const std::string &, StringRef) instead. Will be removed in 2027.1.0.", "2026.1.0")
  void subscribe_homeassistant_state(void (T::*callback)(std::string, std::string), const std::string &entity_id,
                                     const std::string &attribute = "") {
    auto f = std::bind(callback, (T *) this, entity_id, std::placeholders::_1);
-    global_api_server->subscribe_home_assistant_state(entity_id, optional<std::string>(attribute), f);
+    // Explicit type to disambiguate overload resolution
+    global_api_server->subscribe_home_assistant_state(entity_id, optional<std::string>(attribute),
+                                                      std::function<void(const std::string &)>(f));
  }
 #else
+  template<typename T>
+  void subscribe_homeassistant_state(void (T::*callback)(StringRef), const std::string &entity_id,
+                                     const std::string &attribute = "") {
+    static_assert(sizeof(T) == 0,
+                  "subscribe_homeassistant_state() requires 'homeassistant_states: true' in the 'api:' section "
+                  "of your YAML configuration");
+  }
+
  template<typename T>
  void subscribe_homeassistant_state(void (T::*callback)(std::string), const std::string &entity_id,
                                     const std::string &attribute = "") {
@@ -173,6 +210,14 @@ class CustomAPIDevice {
                  "of your YAML configuration");
  }

+  template<typename T>
+  void subscribe_homeassistant_state(void (T::*callback)(const std::string &, StringRef), const std::string &entity_id,
+                                     const std::string &attribute = "") {
+    static_assert(sizeof(T) == 0,
+                  "subscribe_homeassistant_state() requires 'homeassistant_states: true' in the 'api:' section "
+                  "of your YAML configuration");
+  }
+
  template<typename T>
  void subscribe_homeassistant_state(void (T::*callback)(std::string, std::string), const std::string &entity_id,
                                     const std::string &attribute = "") {
@@ -195,7 +240,7 @@ class CustomAPIDevice {
   */
  void call_homeassistant_service(const std::string &service_name) {
    HomeassistantActionRequest resp;
-    resp.set_service(StringRef(service_name));
+    resp.service = StringRef(service_name);
    global_api_server->send_homeassistant_action(resp);
  }

@@ -215,12 +260,12 @@ class CustomAPIDevice {
   */
  void call_homeassistant_service(const std::string &service_name, const std::map<std::string, std::string> &data) {
    HomeassistantActionRequest resp;
-    resp.set_service(StringRef(service_name));
+    resp.service = StringRef(service_name);
    resp.data.init(data.size());
    for (auto &it : data) {
      auto &kv = resp.data.emplace_back();
-      kv.set_key(StringRef(it.first));
-      kv.value = it.second;
+      kv.key = StringRef(it.first);
+      kv.value = it.second;  // value is std::string (no_zero_copy), assign directly
    }
    global_api_server->send_homeassistant_action(resp);
  }
@@ -237,7 +282,7 @@ class CustomAPIDevice {
   */
  void fire_homeassistant_event(const std::string &event_name) {
    HomeassistantActionRequest resp;
-    resp.set_service(StringRef(event_name));
+    resp.service = StringRef(event_name);
    resp.is_event = true;
    global_api_server->send_homeassistant_action(resp);
  }
@@ -257,13 +302,13 @@ class CustomAPIDevice {
   */
  void fire_homeassistant_event(const std::string &service_name, const std::map<std::string, std::string> &data) {
    HomeassistantActionRequest resp;
-    resp.set_service(StringRef(service_name));
+    resp.service = StringRef(service_name);
    resp.is_event = true;
    resp.data.init(data.size());
    for (auto &it : data) {
      auto &kv = resp.data.emplace_back();
-      kv.set_key(StringRef(it.first));
-      kv.value = it.second;
+      kv.key = StringRef(it.first);
+      kv.value = it.second;  // value is std::string (no_zero_copy), assign directly
    }
    global_api_server->send_homeassistant_action(resp);
  }
--- a/esphome/components/api/homeassistant_service.h
+++ b/esphome/components/api/homeassistant_service.h
@@ -67,10 +67,10 @@ template<typename... Ts> class TemplatableKeyValuePair {
 // the callback is invoked synchronously while the message is on the stack).
 class ActionResponse {
 public:
-  ActionResponse(bool success, const std::string &error_message) : success_(success), error_message_(error_message) {}
+  ActionResponse(bool success, StringRef error_message) : success_(success), error_message_(error_message) {}

 #ifdef USE_API_HOMEASSISTANT_ACTION_RESPONSES_JSON
-  ActionResponse(bool success, const std::string &error_message, const uint8_t *data, size_t data_len)
+  ActionResponse(bool success, StringRef error_message, const uint8_t *data, size_t data_len)
      : success_(success), error_message_(error_message) {
    if (data == nullptr || data_len == 0)
      return;
@@ -147,7 +147,7 @@ template<typename... Ts> class HomeAssistantServiceCallAction : public Action<Ts
  void play(const Ts &...x) override {
    HomeassistantActionRequest resp;
    std::string service_value = this->service_.value(x...);
-    resp.set_service(StringRef(service_value));
+    resp.service = StringRef(service_value);
    resp.is_event = this->flags_.is_event;
    this->populate_service_map(resp.data, this->data_, x...);
    this->populate_service_map(resp.data_template, this->data_template_, x...);
@@ -209,7 +209,7 @@ template<typename... Ts> class HomeAssistantServiceCallAction : public Action<Ts
    dest.init(source.size());
    for (auto &it : source) {
      auto &kv = dest.emplace_back();
-      kv.set_key(StringRef(it.key));
+      kv.key = StringRef(it.key);
      kv.value = it.value.value(x...);
    }
  }
--- a/esphome/components/api/list_entities.cpp
+++ b/esphome/components/api/list_entities.cpp
@@ -73,6 +73,9 @@ LIST_ENTITIES_HANDLER(media_player, media_player::MediaPlayer, ListEntitiesMedia
 LIST_ENTITIES_HANDLER(alarm_control_panel, alarm_control_panel::AlarmControlPanel,
                      ListEntitiesAlarmControlPanelResponse)
 #endif
+#ifdef USE_WATER_HEATER
+LIST_ENTITIES_HANDLER(water_heater, water_heater::WaterHeater, ListEntitiesWaterHeaterResponse)
+#endif
 #ifdef USE_EVENT
 LIST_ENTITIES_HANDLER(event, event::Event, ListEntitiesEventResponse)
 #endif
--- a/esphome/components/api/list_entities.h
+++ b/esphome/components/api/list_entities.h
@@ -82,6 +82,9 @@ class ListEntitiesIterator : public ComponentIterator {
 #ifdef USE_ALARM_CONTROL_PANEL
  bool on_alarm_control_panel(alarm_control_panel::AlarmControlPanel *entity) override;
 #endif
+#ifdef USE_WATER_HEATER
+  bool on_water_heater(water_heater::WaterHeater *entity) override;
+#endif
 #ifdef USE_EVENT
  bool on_event(event::Event *entity) override;
 #endif
--- a/esphome/components/api/proto.h
+++ b/esphome/components/api/proto.h
@@ -54,16 +54,16 @@ inline constexpr int64_t decode_zigzag64(uint64_t value) {
 * 3. Global/static strings: StringRef(GLOBAL_CONSTANT) - Always safe
 * 4. Local variables: Safe ONLY if encoding happens before function returns:
 *    std::string temp = compute_value();
- *    msg.set_field(StringRef(temp));
+ *    msg.field = StringRef(temp);
 *    return this->send_message(msg);  // temp is valid during encoding
 *
 * Unsafe Patterns (WILL cause crashes/corruption):
- * 1. Temporaries: msg.set_field(StringRef(obj.get_string())) // get_string() returns by value
- * 2. Concatenation: msg.set_field(StringRef(str1 + str2)) // Result is temporary
+ * 1. Temporaries: msg.field = StringRef(obj.get_string()) // get_string() returns by value
+ * 2. Concatenation: msg.field = StringRef(str1 + str2) // Result is temporary
 *
 * For unsafe patterns, store in a local variable first:
 *    std::string temp = get_string();  // or str1 + str2
- *    msg.set_field(StringRef(temp));
+ *    msg.field = StringRef(temp);
 *
 * The send_*_response pattern ensures proper lifetime management by encoding
 * within the same function scope where temporaries are created.
@@ -334,7 +334,7 @@ class ProtoWriteBuffer {
  void encode_sint64(uint32_t field_id, int64_t value, bool force = false) {
    this->encode_uint64(field_id, encode_zigzag64(value), force);
  }
-  void encode_message(uint32_t field_id, const ProtoMessage &value, bool force = false);
+  void encode_message(uint32_t field_id, const ProtoMessage &value);
  std::vector<uint8_t> *get_buffer() const { return buffer_; }

 protected:
@@ -795,7 +795,7 @@ class ProtoSize {
 };

 // Implementation of encode_message - must be after ProtoMessage is defined
-inline void ProtoWriteBuffer::encode_message(uint32_t field_id, const ProtoMessage &value, bool force) {
+inline void ProtoWriteBuffer::encode_message(uint32_t field_id, const ProtoMessage &value) {
  this->encode_field_raw(field_id, 2);  // type 2: Length-delimited message

  // Calculate the message size first
@@ -833,9 +833,6 @@ class ProtoService {
  virtual bool is_authenticated() = 0;
  virtual bool is_connection_setup() = 0;
  virtual void on_fatal_error() = 0;
-#ifdef USE_API_PASSWORD
-  virtual void on_unauthenticated_access() = 0;
-#endif
  virtual void on_no_setup_connection() = 0;
  /**
   * Create a buffer with a reserved size.
@@ -873,20 +870,7 @@ class ProtoService {
    return true;
  }

-  inline bool check_authenticated_() {
-#ifdef USE_API_PASSWORD
-    if (!this->check_connection_setup_()) {
-      return false;
-    }
-    if (!this->is_authenticated()) {
-      this->on_unauthenticated_access();
-      return false;
-    }
-    return true;
-#else
-    return this->check_connection_setup_();
-#endif
-  }
+  inline bool check_authenticated_() { return this->check_connection_setup_(); }
 };

 }  // namespace esphome::api
--- a/esphome/components/api/subscribe_state.cpp
+++ b/esphome/components/api/subscribe_state.cpp
@@ -60,6 +60,9 @@ INITIAL_STATE_HANDLER(media_player, media_player::MediaPlayer)
 #ifdef USE_ALARM_CONTROL_PANEL
 INITIAL_STATE_HANDLER(alarm_control_panel, alarm_control_panel::AlarmControlPanel)
 #endif
+#ifdef USE_WATER_HEATER
+INITIAL_STATE_HANDLER(water_heater, water_heater::WaterHeater)
+#endif
 #ifdef USE_UPDATE
 INITIAL_STATE_HANDLER(update, update::UpdateEntity)
 #endif
--- a/esphome/components/api/subscribe_state.h
+++ b/esphome/components/api/subscribe_state.h
@@ -76,6 +76,9 @@ class InitialStateIterator : public ComponentIterator {
 #ifdef USE_ALARM_CONTROL_PANEL
  bool on_alarm_control_panel(alarm_control_panel::AlarmControlPanel *entity) override;
 #endif
+#ifdef USE_WATER_HEATER
+  bool on_water_heater(water_heater::WaterHeater *entity) override;
+#endif
 #ifdef USE_EVENT
  bool on_event(event::Event *event) override { return true; };
 #endif
--- a/esphome/components/api/user_services.h
+++ b/esphome/components/api/user_services.h
@@ -46,7 +46,7 @@ template<typename... Ts> class UserServiceBase : public UserServiceDescriptor {

  ListEntitiesServicesResponse encode_list_service_response() override {
    ListEntitiesServicesResponse msg;
-    msg.set_name(StringRef(this->name_));
+    msg.name = StringRef(this->name_);
    msg.key = this->key_;
    msg.supports_response = this->supports_response_;
    std::array<enums::ServiceArgType, sizeof...(Ts)> arg_types = {to_service_arg_type<Ts>()...};
@@ -54,7 +54,7 @@ template<typename... Ts> class UserServiceBase : public UserServiceDescriptor {
    for (size_t i = 0; i < sizeof...(Ts); i++) {
      auto &arg = msg.args.emplace_back();
      arg.type = arg_types[i];
-      arg.set_name(StringRef(this->arg_names_[i]));
+      arg.name = StringRef(this->arg_names_[i]);
    }
    return msg;
  }
@@ -108,7 +108,7 @@ template<typename... Ts> class UserServiceDynamic : public UserServiceDescriptor

  ListEntitiesServicesResponse encode_list_service_response() override {
    ListEntitiesServicesResponse msg;
-    msg.set_name(StringRef(this->name_));
+    msg.name = StringRef(this->name_);
    msg.key = this->key_;
    msg.supports_response = enums::SUPPORTS_RESPONSE_NONE;  // Dynamic services don't support responses yet
    std::array<enums::ServiceArgType, sizeof...(Ts)> arg_types = {to_service_arg_type<Ts>()...};
@@ -116,7 +116,7 @@ template<typename... Ts> class UserServiceDynamic : public UserServiceDescriptor
    for (size_t i = 0; i < sizeof...(Ts); i++) {
      auto &arg = msg.args.emplace_back();
      arg.type = arg_types[i];
-      arg.set_name(StringRef(this->arg_names_[i]));
+      arg.name = StringRef(this->arg_names_[i]);
    }
    return msg;
  }
@@ -255,7 +255,7 @@ template<typename... Ts> class APIRespondAction : public Action<Ts...> {
            bool return_response = std::get<1>(args);
            if (!return_response) {
              // Client doesn't want response data, just send success/error
-              this->parent_->send_action_response(call_id, success, error_message);
+              this->parent_->send_action_response(call_id, success, StringRef(error_message));
              return;
            }
          }
@@ -265,12 +265,12 @@ template<typename... Ts> class APIRespondAction : public Action<Ts...> {
      json::JsonBuilder builder;
      this->json_builder_(x..., builder.root());
      std::string json_str = builder.serialize();
-      this->parent_->send_action_response(call_id, success, error_message,
+      this->parent_->send_action_response(call_id, success, StringRef(error_message),
                                          reinterpret_cast<const uint8_t *>(json_str.data()), json_str.size());
      return;
    }
 #endif
-    this->parent_->send_action_response(call_id, success, error_message);
+    this->parent_->send_action_response(call_id, success, StringRef(error_message));
  }

 protected:
--- a/esphome/components/aqi/init.py
+++ b/esphome/components/aqi/init.py
@@ -0,0 +1,14 @@
+import esphome.codegen as cg
+
+CODEOWNERS = ["@jasstrong", "@ximex", "@freekode"]
+
+aqi_ns = cg.esphome_ns.namespace("aqi")
+AQICalculatorType = aqi_ns.enum("AQICalculatorType")
+
+CONF_AQI = "aqi"
+CONF_CALCULATION_TYPE = "calculation_type"
+
+AQI_CALCULATION_TYPE = {
+    "CAQI": AQICalculatorType.CAQI_TYPE,
+    "AQI": AQICalculatorType.AQI_TYPE,
+}
--- a/esphome/components/hm3301/abstract_aqi_calculator.h
+++ b/esphome/components/hm3301/abstract_aqi_calculator.h
@@ -2,13 +2,11 @@

 #include <cstdint>

-namespace esphome {
-namespace hm3301 {
+namespace esphome::aqi {

 class AbstractAQICalculator {
 public:
  virtual uint16_t get_aqi(uint16_t pm2_5_value, uint16_t pm10_0_value) = 0;
 };

-}  // namespace hm3301
-}  // namespace esphome
+}  // namespace esphome::aqi
--- a/esphome/components/aqi/aqi_calculator.h
+++ b/esphome/components/aqi/aqi_calculator.h
@@ -0,0 +1,52 @@
+#pragma once
+
+#include <climits>
+#include "abstract_aqi_calculator.h"
+
+// https://document.airnow.gov/technical-assistance-document-for-the-reporting-of-daily-air-quailty.pdf
+
+namespace esphome::aqi {
+
+class AQICalculator : public AbstractAQICalculator {
+ public:
+  uint16_t get_aqi(uint16_t pm2_5_value, uint16_t pm10_0_value) override {
+    int pm2_5_index = calculate_index(pm2_5_value, PM2_5_GRID);
+    int pm10_0_index = calculate_index(pm10_0_value, PM10_0_GRID);
+
+    return (pm2_5_index < pm10_0_index) ? pm10_0_index : pm2_5_index;
+  }
+
+ protected:
+  static constexpr int NUM_LEVELS = 6;
+
+  static constexpr int INDEX_GRID[NUM_LEVELS][2] = {{0, 50}, {51, 100}, {101, 150}, {151, 200}, {201, 300}, {301, 500}};
+
+  static constexpr int PM2_5_GRID[NUM_LEVELS][2] = {{0, 9}, {10, 35}, {36, 55}, {56, 125}, {126, 225}, {226, INT_MAX}};
+
+  static constexpr int PM10_0_GRID[NUM_LEVELS][2] = {{0, 54},    {55, 154},  {155, 254},
+                                                     {255, 354}, {355, 424}, {425, INT_MAX}};
+
+  static int calculate_index(uint16_t value, const int array[NUM_LEVELS][2]) {
+    int grid_index = get_grid_index(value, array);
+    if (grid_index == -1) {
+      return -1;
+    }
+    int aqi_lo = INDEX_GRID[grid_index][0];
+    int aqi_hi = INDEX_GRID[grid_index][1];
+    int conc_lo = array[grid_index][0];
+    int conc_hi = array[grid_index][1];
+
+    return (value - conc_lo) * (aqi_hi - aqi_lo) / (conc_hi - conc_lo) + aqi_lo;
+  }
+
+  static int get_grid_index(uint16_t value, const int array[NUM_LEVELS][2]) {
+    for (int i = 0; i < NUM_LEVELS; i++) {
+      if (value >= array[i][0] && value <= array[i][1]) {
+        return i;
+      }
+    }
+    return -1;
+  }
+};
+
+}  // namespace esphome::aqi
--- a/esphome/components/hm3301/aqi_calculator_factory.h
+++ b/esphome/components/hm3301/aqi_calculator_factory.h
@@ -3,8 +3,7 @@
 #include "caqi_calculator.h"
 #include "aqi_calculator.h"

-namespace esphome {
-namespace hm3301 {
+namespace esphome::aqi {

 enum AQICalculatorType { CAQI_TYPE = 0, AQI_TYPE = 1 };

@@ -12,18 +11,17 @@ class AQICalculatorFactory {
 public:
  AbstractAQICalculator *get_calculator(AQICalculatorType type) {
    if (type == 0) {
-      return caqi_calculator_;
+      return &this->caqi_calculator_;
    } else if (type == 1) {
-      return aqi_calculator_;
+      return &this->aqi_calculator_;
    }

    return nullptr;
  }

 protected:
-  CAQICalculator *caqi_calculator_ = new CAQICalculator();
-  AQICalculator *aqi_calculator_ = new AQICalculator();
+  CAQICalculator caqi_calculator_;
+  AQICalculator aqi_calculator_;
 };

-}  // namespace hm3301
-}  // namespace esphome
+}  // namespace esphome::aqi
--- a/esphome/components/aqi/aqi_sensor.cpp
+++ b/esphome/components/aqi/aqi_sensor.cpp
@@ -0,0 +1,52 @@
+#include "aqi_sensor.h"
+#include "esphome/core/log.h"
+
+namespace esphome::aqi {
+
+static const char *const TAG = "aqi";
+
+void AQISensor::setup() {
+  if (this->pm_2_5_sensor_ != nullptr) {
+    this->pm_2_5_sensor_->add_on_state_callback([this](float value) {
+      this->pm_2_5_value_ = value;
+      // Defer calculation to avoid double-publishing if both sensors update in the same loop
+      this->defer("update", [this]() { this->calculate_aqi_(); });
+    });
+  }
+  if (this->pm_10_0_sensor_ != nullptr) {
+    this->pm_10_0_sensor_->add_on_state_callback([this](float value) {
+      this->pm_10_0_value_ = value;
+      this->defer("update", [this]() { this->calculate_aqi_(); });
+    });
+  }
+}
+
+void AQISensor::dump_config() {
+  ESP_LOGCONFIG(TAG, "AQI Sensor:");
+  ESP_LOGCONFIG(TAG, "  Calculation Type: %s", this->aqi_calc_type_ == AQI_TYPE ? "AQI" : "CAQI");
+  if (this->pm_2_5_sensor_ != nullptr) {
+    ESP_LOGCONFIG(TAG, "  PM2.5 Sensor: '%s'", this->pm_2_5_sensor_->get_name().c_str());
+  }
+  if (this->pm_10_0_sensor_ != nullptr) {
+    ESP_LOGCONFIG(TAG, "  PM10 Sensor: '%s'", this->pm_10_0_sensor_->get_name().c_str());
+  }
+  LOG_SENSOR("  ", "AQI", this);
+}
+
+void AQISensor::calculate_aqi_() {
+  if (std::isnan(this->pm_2_5_value_) || std::isnan(this->pm_10_0_value_)) {
+    return;
+  }
+
+  AbstractAQICalculator *calculator = this->aqi_calculator_factory_.get_calculator(this->aqi_calc_type_);
+  if (calculator == nullptr) {
+    ESP_LOGW(TAG, "Unknown AQI calculator type");
+    return;
+  }
+
+  uint16_t aqi =
+      calculator->get_aqi(static_cast<uint16_t>(this->pm_2_5_value_), static_cast<uint16_t>(this->pm_10_0_value_));
+  this->publish_state(aqi);
+}
+
+}  // namespace esphome::aqi
--- a/esphome/components/aqi/aqi_sensor.h
+++ b/esphome/components/aqi/aqi_sensor.h
@@ -0,0 +1,31 @@
+#pragma once
+
+#include "esphome/core/component.h"
+#include "esphome/components/sensor/sensor.h"
+#include "aqi_calculator_factory.h"
+
+namespace esphome::aqi {
+
+class AQISensor : public sensor::Sensor, public Component {
+ public:
+  void setup() override;
+  void dump_config() override;
+  float get_setup_priority() const override { return setup_priority::DATA; }
+
+  void set_pm_2_5_sensor(sensor::Sensor *sensor) { this->pm_2_5_sensor_ = sensor; }
+  void set_pm_10_0_sensor(sensor::Sensor *sensor) { this->pm_10_0_sensor_ = sensor; }
+  void set_aqi_calculation_type(AQICalculatorType type) { this->aqi_calc_type_ = type; }
+
+ protected:
+  void calculate_aqi_();
+
+  sensor::Sensor *pm_2_5_sensor_{nullptr};
+  sensor::Sensor *pm_10_0_sensor_{nullptr};
+  AQICalculatorType aqi_calc_type_{AQI_TYPE};
+  AQICalculatorFactory aqi_calculator_factory_;
+
+  float pm_2_5_value_{NAN};
+  float pm_10_0_value_{NAN};
+};
+
+}  // namespace esphome::aqi
--- a/esphome/components/aqi/caqi_calculator.h
+++ b/esphome/components/aqi/caqi_calculator.h
@@ -0,0 +1,49 @@
+#pragma once
+
+#include "abstract_aqi_calculator.h"
+
+namespace esphome::aqi {
+
+class CAQICalculator : public AbstractAQICalculator {
+ public:
+  uint16_t get_aqi(uint16_t pm2_5_value, uint16_t pm10_0_value) override {
+    int pm2_5_index = calculate_index(pm2_5_value, PM2_5_GRID);
+    int pm10_0_index = calculate_index(pm10_0_value, PM10_0_GRID);
+
+    return (pm2_5_index < pm10_0_index) ? pm10_0_index : pm2_5_index;
+  }
+
+ protected:
+  static constexpr int NUM_LEVELS = 5;
+
+  static constexpr int INDEX_GRID[NUM_LEVELS][2] = {{0, 25}, {26, 50}, {51, 75}, {76, 100}, {101, 400}};
+
+  static constexpr int PM2_5_GRID[NUM_LEVELS][2] = {{0, 15}, {16, 30}, {31, 55}, {56, 110}, {111, 400}};
+
+  static constexpr int PM10_0_GRID[NUM_LEVELS][2] = {{0, 25}, {26, 50}, {51, 90}, {91, 180}, {181, 400}};
+
+  static int calculate_index(uint16_t value, const int array[NUM_LEVELS][2]) {
+    int grid_index = get_grid_index(value, array);
+    if (grid_index == -1) {
+      return -1;
+    }
+
+    int aqi_lo = INDEX_GRID[grid_index][0];
+    int aqi_hi = INDEX_GRID[grid_index][1];
+    int conc_lo = array[grid_index][0];
+    int conc_hi = array[grid_index][1];
+
+    return (value - conc_lo) * (aqi_hi - aqi_lo) / (conc_hi - conc_lo) + aqi_lo;
+  }
+
+  static int get_grid_index(uint16_t value, const int array[NUM_LEVELS][2]) {
+    for (int i = 0; i < NUM_LEVELS; i++) {
+      if (value >= array[i][0] && value <= array[i][1]) {
+        return i;
+      }
+    }
+    return -1;
+  }
+};
+
+}  // namespace esphome::aqi
--- a/esphome/components/aqi/sensor.py
+++ b/esphome/components/aqi/sensor.py
@@ -0,0 +1,51 @@
+import esphome.codegen as cg
+from esphome.components import sensor
+import esphome.config_validation as cv
+from esphome.const import (
+    CONF_PM_2_5,
+    CONF_PM_10_0,
+    DEVICE_CLASS_AQI,
+    STATE_CLASS_MEASUREMENT,
+)
+
+from . import AQI_CALCULATION_TYPE, CONF_CALCULATION_TYPE, aqi_ns
+
+CODEOWNERS = ["@jasstrong"]
+DEPENDENCIES = ["sensor"]
+
+UNIT_INDEX = "index"
+
+AQISensor = aqi_ns.class_("AQISensor", sensor.Sensor, cg.Component)
+
+CONFIG_SCHEMA = (
+    sensor.sensor_schema(
+        AQISensor,
+        unit_of_measurement=UNIT_INDEX,
+        accuracy_decimals=0,
+        device_class=DEVICE_CLASS_AQI,
+        state_class=STATE_CLASS_MEASUREMENT,
+    )
+    .extend(
+        {
+            cv.Required(CONF_PM_2_5): cv.use_id(sensor.Sensor),
+            cv.Required(CONF_PM_10_0): cv.use_id(sensor.Sensor),
+            cv.Required(CONF_CALCULATION_TYPE): cv.enum(
+                AQI_CALCULATION_TYPE, upper=True
+            ),
+        }
+    )
+    .extend(cv.COMPONENT_SCHEMA)
+)
+
+
+async def to_code(config):
+    var = await sensor.new_sensor(config)
+    await cg.register_component(var, config)
+
+    pm_2_5_sensor = await cg.get_variable(config[CONF_PM_2_5])
+    cg.add(var.set_pm_2_5_sensor(pm_2_5_sensor))
+
+    pm_10_0_sensor = await cg.get_variable(config[CONF_PM_10_0])
+    cg.add(var.set_pm_10_0_sensor(pm_10_0_sensor))
+
+    cg.add(var.set_aqi_calculation_type(config[CONF_CALCULATION_TYPE]))
--- a/esphome/components/as3935/as3935.cpp
+++ b/esphome/components/as3935/as3935.cpp
@@ -305,12 +305,14 @@ bool AS3935Component::calibrate_oscillator() {
 }

 void AS3935Component::tune_antenna() {
-  ESP_LOGI(TAG, "Starting antenna tuning");
  uint8_t div_ratio = this->read_div_ratio();
  uint8_t tune_val = this->read_capacitance();
-  ESP_LOGI(TAG, "Division Ratio is set to: %d", div_ratio);
-  ESP_LOGI(TAG, "Internal Capacitor is set to: %d", tune_val);
-  ESP_LOGI(TAG, "Displaying oscillator on INT pin. Measure its frequency - multiply value by Division Ratio");
+  ESP_LOGI(TAG,
+           "Starting antenna tuning\n"
+           "Division Ratio is set to: %d\n"
+           "Internal Capacitor is set to: %d\n"
+           "Displaying oscillator on INT pin. Measure its frequency - multiply value by Division Ratio",
+           div_ratio, tune_val);
  this->display_oscillator(true, ANTFREQ);
 }

--- a/esphome/components/async_tcp/init.py
+++ b/esphome/components/async_tcp/init.py
@@ -1,37 +1,50 @@
-# Dummy integration to allow relying on AsyncTCP
+# Async TCP client support for all platforms
 import esphome.codegen as cg
 import esphome.config_validation as cv
-from esphome.const import (
-    PLATFORM_BK72XX,
-    PLATFORM_ESP32,
-    PLATFORM_ESP8266,
-    PLATFORM_LN882X,
-    PLATFORM_RTL87XX,
-)
 from esphome.core import CORE, CoroPriority, coroutine_with_priority

 CODEOWNERS = ["@esphome/core"]
+DEPENDENCIES = ["network"]

-CONFIG_SCHEMA = cv.All(
-    cv.Schema({}),
-    cv.only_with_arduino,
-    cv.only_on(
-        [
-            PLATFORM_ESP32,
-            PLATFORM_ESP8266,
-            PLATFORM_BK72XX,
-            PLATFORM_LN882X,
-            PLATFORM_RTL87XX,
-        ]
-    ),
-)
+
+def AUTO_LOAD() -> list[str]:
+    # Socket component needed for platforms using socket-based implementation
+    # ESP32, ESP8266, RP2040, and LibreTiny use AsyncTCP libraries, others use sockets
+    if (
+        not CORE.is_esp32
+        and not CORE.is_esp8266
+        and not CORE.is_rp2040
+        and not CORE.is_libretiny
+    ):
+        return ["socket"]
+    return []
+
+
+# Support all platforms - Arduino/ESP-IDF get libraries, other platforms use socket implementation
+CONFIG_SCHEMA = cv.Schema({})


@coroutine_with_priority(CoroPriority.NETWORK_TRANSPORT)
 async def to_code(config):
-    if CORE.is_esp32 or CORE.is_libretiny:
+    if CORE.is_esp32:
+        # https://github.com/ESP32Async/AsyncTCP
+        from esphome.components.esp32 import add_idf_component
+
+        add_idf_component(name="esp32async/asynctcp", ref="3.4.91")
+    elif CORE.is_libretiny:
        # https://github.com/ESP32Async/AsyncTCP
        cg.add_library("ESP32Async/AsyncTCP", "3.4.5")
    elif CORE.is_esp8266:
        # https://github.com/ESP32Async/ESPAsyncTCP
        cg.add_library("ESP32Async/ESPAsyncTCP", "2.0.0")
+    elif CORE.is_rp2040:
+        # https://github.com/khoih-prog/AsyncTCP_RP2040W
+        cg.add_library("khoih-prog/AsyncTCP_RP2040W", "1.2.0")
+    # Other platforms (host, etc) use socket-based implementation
+
+
+def FILTER_SOURCE_FILES() -> list[str]:
+    # Exclude socket implementation for platforms that use AsyncTCP libraries
+    if CORE.is_esp32 or CORE.is_esp8266 or CORE.is_rp2040 or CORE.is_libretiny:
+        return ["async_tcp_socket.cpp"]
+    return []
--- a/esphome/components/async_tcp/async_tcp.h
+++ b/esphome/components/async_tcp/async_tcp.h
@@ -0,0 +1,16 @@
+#pragma once
+#include "esphome/core/defines.h"
+
+#if defined(USE_ESP32) || defined(USE_LIBRETINY)
+// Use AsyncTCP library for ESP32 (Arduino or ESP-IDF) and LibreTiny
+#include <AsyncTCP.h>
+#elif defined(USE_ESP8266)
+// Use ESPAsyncTCP library for ESP8266 (always Arduino)
+#include <ESPAsyncTCP.h>
+#elif defined(USE_RP2040)
+// Use AsyncTCP_RP2040W library for RP2040
+#include <AsyncTCP_RP2040W.h>
+#else
+// Use socket-based implementation for other platforms
+#include "async_tcp_socket.h"
+#endif
--- a/esphome/components/async_tcp/async_tcp_socket.cpp
+++ b/esphome/components/async_tcp/async_tcp_socket.cpp
@@ -0,0 +1,162 @@
+#include "async_tcp_socket.h"
+
+#if !defined(USE_ESP32) && !defined(USE_ESP8266) && !defined(USE_RP2040) && !defined(USE_LIBRETINY) && \
+    (defined(USE_SOCKET_IMPL_LWIP_SOCKETS) || defined(USE_SOCKET_IMPL_BSD_SOCKETS))
+
+#include "esphome/components/network/util.h"
+#include "esphome/core/log.h"
+#include <cerrno>
+#include <sys/select.h>
+
+namespace esphome::async_tcp {
+
+static const char *const TAG = "async_tcp";
+
+// Read buffer size matches TCP MSS (1500 MTU - 40 bytes IP/TCP headers).
+// This implementation only runs on ESP-IDF and host which have ample stack.
+static constexpr size_t READ_BUFFER_SIZE = 1460;
+
+bool AsyncClient::connect(const char *host, uint16_t port) {
+  if (connected_ || connecting_) {
+    ESP_LOGW(TAG, "Already connected/connecting");
+    return false;
+  }
+
+  // Resolve address
+  struct sockaddr_storage addr;
+  socklen_t addrlen = esphome::socket::set_sockaddr((struct sockaddr *) &addr, sizeof(addr), host, port);
+  if (addrlen == 0) {
+    ESP_LOGE(TAG, "Invalid address: %s", host);
+    if (error_cb_)
+      error_cb_(error_arg_, this, -1);
+    return false;
+  }
+
+  // Create socket with loop monitoring
+  int family = ((struct sockaddr *) &addr)->sa_family;
+  socket_ = esphome::socket::socket_loop_monitored(family, SOCK_STREAM, IPPROTO_TCP);
+  if (!socket_) {
+    ESP_LOGE(TAG, "Failed to create socket");
+    if (error_cb_)
+      error_cb_(error_arg_, this, -1);
+    return false;
+  }
+
+  socket_->setblocking(false);
+
+  int err = socket_->connect((struct sockaddr *) &addr, addrlen);
+  if (err == 0) {
+    // Connection succeeded immediately (rare, but possible for localhost)
+    connected_ = true;
+    if (connect_cb_)
+      connect_cb_(connect_arg_, this);
+    return true;
+  }
+  if (errno != EINPROGRESS) {
+    ESP_LOGE(TAG, "Connect failed: %d", errno);
+    close();
+    if (error_cb_)
+      error_cb_(error_arg_, this, errno);
+    return false;
+  }
+
+  connecting_ = true;
+  return true;
+}
+
+void AsyncClient::close() {
+  socket_.reset();
+  bool was_connected = connected_;
+  connected_ = false;
+  connecting_ = false;
+  if (was_connected && disconnect_cb_)
+    disconnect_cb_(disconnect_arg_, this);
+}
+
+size_t AsyncClient::write(const char *data, size_t len) {
+  if (!socket_ || !connected_)
+    return 0;
+
+  ssize_t sent = socket_->write(data, len);
+  if (sent < 0) {
+    if (errno != EAGAIN && errno != EWOULDBLOCK) {
+      ESP_LOGE(TAG, "Write error: %d", errno);
+      close();
+      if (error_cb_)
+        error_cb_(error_arg_, this, errno);
+    }
+    return 0;
+  }
+  return sent;
+}
+
+void AsyncClient::loop() {
+  if (!socket_)
+    return;
+
+  if (connecting_) {
+    // For connecting, we need to check writability, not readability
+    // The Application's select() only monitors read FDs, so we do our own check here
+    // For ESP platforms lwip_select() might be faster, but this code isn't used
+    // on those platforms anyway. If it was, we'd fix the Application select()
+    // to report writability instead of doing it this way.
+    int fd = socket_->get_fd();
+    if (fd < 0) {
+      ESP_LOGW(TAG, "Invalid socket fd");
+      close();
+      return;
+    }
+
+    fd_set writefds;
+    FD_ZERO(&writefds);
+    FD_SET(fd, &writefds);
+
+    struct timeval tv = {0, 0};
+    int ret = select(fd + 1, nullptr, &writefds, nullptr, &tv);
+
+    if (ret > 0 && FD_ISSET(fd, &writefds)) {
+      int error = 0;
+      socklen_t len = sizeof(error);
+      if (socket_->getsockopt(SOL_SOCKET, SO_ERROR, &error, &len) == 0 && error == 0) {
+        connecting_ = false;
+        connected_ = true;
+        if (connect_cb_)
+          connect_cb_(connect_arg_, this);
+      } else {
+        ESP_LOGW(TAG, "Connection failed: %d", error);
+        close();
+        if (error_cb_)
+          error_cb_(error_arg_, this, error);
+      }
+    } else if (ret < 0) {
+      ESP_LOGE(TAG, "Select error: %d", errno);
+      close();
+      if (error_cb_)
+        error_cb_(error_arg_, this, errno);
+    }
+  } else if (connected_) {
+    // For connected sockets, use the Application's select() results
+    if (!socket_->ready())
+      return;
+
+    uint8_t buf[READ_BUFFER_SIZE];
+    ssize_t len = socket_->read(buf, READ_BUFFER_SIZE);
+
+    if (len == 0) {
+      ESP_LOGI(TAG, "Connection closed by peer");
+      close();
+    } else if (len > 0) {
+      if (data_cb_)
+        data_cb_(data_arg_, this, buf, len);
+    } else if (errno != EAGAIN && errno != EWOULDBLOCK) {
+      ESP_LOGW(TAG, "Read error: %d", errno);
+      close();
+      if (error_cb_)
+        error_cb_(error_arg_, this, errno);
+    }
+  }
+}
+
+}  // namespace esphome::async_tcp
+
+#endif
--- a/esphome/components/async_tcp/async_tcp_socket.h
+++ b/esphome/components/async_tcp/async_tcp_socket.h
@@ -0,0 +1,73 @@
+#pragma once
+
+#include "esphome/core/defines.h"
+
+#if !defined(USE_ESP32) && !defined(USE_ESP8266) && !defined(USE_RP2040) && !defined(USE_LIBRETINY) && \
+    (defined(USE_SOCKET_IMPL_LWIP_SOCKETS) || defined(USE_SOCKET_IMPL_BSD_SOCKETS))
+
+#include "esphome/components/socket/socket.h"
+#include <functional>
+#include <memory>
+#include <string>
+#include <utility>
+
+namespace esphome::async_tcp {
+
+/// AsyncClient API for platforms using sockets (ESP-IDF, host, etc.)
+/// NOTE: This class is NOT thread-safe. All methods must be called from the main loop.
+class AsyncClient {
+ public:
+  using AcConnectHandler = std::function<void(void *, AsyncClient *)>;
+  using AcDataHandler = std::function<void(void *, AsyncClient *, void *data, size_t len)>;
+  using AcErrorHandler = std::function<void(void *, AsyncClient *, int8_t error)>;
+
+  AsyncClient() = default;
+  ~AsyncClient() = default;
+
+  [[nodiscard]] bool connect(const char *host, uint16_t port);
+  void close();
+  [[nodiscard]] bool connected() const { return connected_; }
+  size_t write(const char *data, size_t len);
+
+  void onConnect(AcConnectHandler cb, void *arg = nullptr) {  // NOLINT(readability-identifier-naming)
+    connect_cb_ = std::move(cb);
+    connect_arg_ = arg;
+  }
+  void onDisconnect(AcConnectHandler cb, void *arg = nullptr) {  // NOLINT(readability-identifier-naming)
+    disconnect_cb_ = std::move(cb);
+    disconnect_arg_ = arg;
+  }
+  /// Set data callback. NOTE: data pointer is only valid during callback execution.
+  void onData(AcDataHandler cb, void *arg = nullptr) {  // NOLINT(readability-identifier-naming)
+    data_cb_ = std::move(cb);
+    data_arg_ = arg;
+  }
+  void onError(AcErrorHandler cb, void *arg = nullptr) {  // NOLINT(readability-identifier-naming)
+    error_cb_ = std::move(cb);
+    error_arg_ = arg;
+  }
+
+  // Must be called from loop()
+  void loop();
+
+ private:
+  std::unique_ptr<esphome::socket::Socket> socket_;
+
+  AcConnectHandler connect_cb_{nullptr};
+  void *connect_arg_{nullptr};
+  AcConnectHandler disconnect_cb_{nullptr};
+  void *disconnect_arg_{nullptr};
+  AcDataHandler data_cb_{nullptr};
+  void *data_arg_{nullptr};
+  AcErrorHandler error_cb_{nullptr};
+  void *error_arg_{nullptr};
+
+  bool connected_{false};
+  bool connecting_{false};
+};
+
+}  // namespace esphome::async_tcp
+
+// Expose AsyncClient in global namespace to match library behavior
+using esphome::async_tcp::AsyncClient;  // NOLINT(google-global-names-in-headers)
+#endif
--- a/esphome/components/atc_mithermometer/atc_mithermometer.cpp
+++ b/esphome/components/atc_mithermometer/atc_mithermometer.cpp
@@ -21,7 +21,9 @@ bool ATCMiThermometer::parse_device(const esp32_ble_tracker::ESPBTDevice &device
    ESP_LOGVV(TAG, "parse_device(): unknown MAC address.");
    return false;
  }
-  ESP_LOGVV(TAG, "parse_device(): MAC address %s found.", device.address_str().c_str());
+  char addr_buf[MAC_ADDRESS_PRETTY_BUFFER_SIZE];
+  const char *addr_str = device.address_str_to(addr_buf);
+  ESP_LOGVV(TAG, "parse_device(): MAC address %s found.", addr_str);

  bool success = false;
  for (auto &service_data : device.get_service_datas()) {
@@ -32,7 +34,7 @@ bool ATCMiThermometer::parse_device(const esp32_ble_tracker::ESPBTDevice &device
    if (!(parse_message_(service_data.data, *res))) {
      continue;
    }
-    if (!(report_results_(res, device.address_str()))) {
+    if (!(report_results_(res, addr_str))) {
      continue;
    }
    if (res->temperature.has_value() && this->temperature_ != nullptr)
@@ -103,13 +105,13 @@ bool ATCMiThermometer::parse_message_(const std::vector<uint8_t> &message, Parse
  return true;
 }

-bool ATCMiThermometer::report_results_(const optional<ParseResult> &result, const std::string &address) {
+bool ATCMiThermometer::report_results_(const optional<ParseResult> &result, const char *address) {
  if (!result.has_value()) {
    ESP_LOGVV(TAG, "report_results(): no results available.");
    return false;
  }

-  ESP_LOGD(TAG, "Got ATC MiThermometer (%s):", address.c_str());
+  ESP_LOGD(TAG, "Got ATC MiThermometer (%s):", address);

  if (result->temperature.has_value()) {
    ESP_LOGD(TAG, "  Temperature: %.1f °C", *result->temperature);
--- a/esphome/components/atc_mithermometer/atc_mithermometer.h
+++ b/esphome/components/atc_mithermometer/atc_mithermometer.h
@@ -41,7 +41,7 @@ class ATCMiThermometer : public Component, public esp32_ble_tracker::ESPBTDevice

  optional<ParseResult> parse_header_(const esp32_ble_tracker::ServiceData &service_data);
  bool parse_message_(const std::vector<uint8_t> &message, ParseResult &result);
-  bool report_results_(const optional<ParseResult> &result, const std::string &address);
+  bool report_results_(const optional<ParseResult> &result, const char *address);
 };

 }  // namespace atc_mithermometer
--- a/esphome/components/audio/audio_reader.cpp
+++ b/esphome/components/audio/audio_reader.cpp
@@ -1,6 +1,6 @@
 #include "audio_reader.h"

-#ifdef USE_ESP_IDF
+#ifdef USE_ESP32

 #include "esphome/core/defines.h"
 #include "esphome/core/hal.h"
--- a/esphome/components/audio/audio_reader.h
+++ b/esphome/components/audio/audio_reader.h
@@ -1,6 +1,6 @@
 #pragma once

-#ifdef USE_ESP_IDF
+#ifdef USE_ESP32

 #include "audio.h"
 #include "audio_transfer_buffer.h"
--- a/esphome/components/b_parasite/b_parasite.cpp
+++ b/esphome/components/b_parasite/b_parasite.cpp
@@ -22,7 +22,8 @@ bool BParasite::parse_device(const esp32_ble_tracker::ESPBTDevice &device) {
    ESP_LOGVV(TAG, "parse_device(): unknown MAC address.");
    return false;
  }
-  ESP_LOGVV(TAG, "parse_device(): MAC address %s found.", device.address_str().c_str());
+  char addr_buf[MAC_ADDRESS_PRETTY_BUFFER_SIZE];
+  ESP_LOGVV(TAG, "parse_device(): MAC address %s found.", device.address_str_to(addr_buf));
  const auto &service_datas = device.get_service_datas();
  if (service_datas.size() != 1) {
    ESP_LOGE(TAG, "Unexpected service_datas size (%d)", service_datas.size());
--- a/esphome/components/bedjet/bedjet_hub.cpp
+++ b/esphome/components/bedjet/bedjet_hub.cpp
@@ -193,8 +193,9 @@ bool BedJetHub::discover_characteristics_() {
      result = false;
    } else if (descr->uuid.get_uuid().len != ESP_UUID_LEN_16 ||
               descr->uuid.get_uuid().uuid.uuid16 != ESP_GATT_UUID_CHAR_CLIENT_CONFIG) {
+      char uuid_buf[espbt::UUID_STR_LEN];
      ESP_LOGW(TAG, "Config descriptor 0x%x (uuid %s) is not a client config char uuid", this->char_handle_status_,
-               descr->uuid.to_string().c_str());
+               descr->uuid.to_str(uuid_buf));
      result = false;
    } else {
      this->config_descr_status_ = descr->handle;
@@ -216,11 +217,14 @@ bool BedJetHub::discover_characteristics_() {
    }
  }

-  ESP_LOGI(TAG, "[%s] Discovered service characteristics: ", this->get_name().c_str());
-  ESP_LOGI(TAG, "     - Command char: 0x%x", this->char_handle_cmd_);
-  ESP_LOGI(TAG, "     - Status char: 0x%x", this->char_handle_status_);
-  ESP_LOGI(TAG, "       - config descriptor: 0x%x", this->config_descr_status_);
-  ESP_LOGI(TAG, "     - Name char: 0x%x", this->char_handle_name_);
+  ESP_LOGI(TAG,
+           "[%s] Discovered service characteristics:\n"
+           "     - Command char: 0x%x\n"
+           "     - Status char: 0x%x\n"
+           "       - config descriptor: 0x%x\n"
+           "     - Name char: 0x%x",
+           this->get_name().c_str(), this->char_handle_cmd_, this->char_handle_status_, this->config_descr_status_,
+           this->char_handle_name_);

  return result;
 }
--- a/esphome/components/bedjet/climate/init.py
+++ b/esphome/components/bedjet/climate/init.py
@@ -1,12 +1,7 @@
 import esphome.codegen as cg
-from esphome.components import ble_client, climate
+from esphome.components import climate
 import esphome.config_validation as cv
-from esphome.const import (
-    CONF_HEAT_MODE,
-    CONF_RECEIVE_TIMEOUT,
-    CONF_TEMPERATURE_SOURCE,
-    CONF_TIME_ID,
-)
+from esphome.const import CONF_HEAT_MODE, CONF_TEMPERATURE_SOURCE

 from .. import BEDJET_CLIENT_SCHEMA, bedjet_ns, register_bedjet_child

@@ -38,22 +33,6 @@ CONFIG_SCHEMA = (
        }
    )
    .extend(cv.polling_component_schema("60s"))
-    .extend(
-        # TODO: remove compat layer.
-        {
-            cv.Optional(ble_client.CONF_BLE_CLIENT_ID): cv.invalid(
-                "The 'ble_client_id' option has been removed. Please migrate "
-                "to the new `bedjet_id` option in the `bedjet` component.\n"
-                "See https://esphome.io/components/climate/bedjet/"
-            ),
-            cv.Optional(CONF_TIME_ID): cv.invalid(
-                "The 'time_id' option has been moved to the `bedjet` component."
-            ),
-            cv.Optional(CONF_RECEIVE_TIMEOUT): cv.invalid(
-                "The 'receive_timeout' option has been moved to the `bedjet` component."
-            ),
-        }
-    )
    .extend(BEDJET_CLIENT_SCHEMA)
 )

--- a/esphome/components/bh1750/bh1750.cpp
+++ b/esphome/components/bh1750/bh1750.cpp
@@ -1,8 +1,8 @@
 #include "bh1750.h"
 #include "esphome/core/log.h"
+#include "esphome/core/application.h"

-namespace esphome {
-namespace bh1750 {
+namespace esphome::bh1750 {

 static const char *const TAG = "bh1750.sensor";

@@ -13,6 +13,31 @@ static const uint8_t BH1750_COMMAND_ONE_TIME_L = 0b00100011;
 static const uint8_t BH1750_COMMAND_ONE_TIME_H = 0b00100000;
 static const uint8_t BH1750_COMMAND_ONE_TIME_H2 = 0b00100001;

+static constexpr uint32_t MEASUREMENT_TIMEOUT_MS = 2000;
+static constexpr float HIGH_LIGHT_THRESHOLD_LX = 7000.0f;
+
+// Measurement time constants (datasheet values)
+static constexpr uint16_t MTREG_DEFAULT = 69;
+static constexpr uint16_t MTREG_MIN = 31;
+static constexpr uint16_t MTREG_MAX = 254;
+static constexpr uint16_t MEAS_TIME_L_MS = 24;   // L-resolution max measurement time @ mtreg=69
+static constexpr uint16_t MEAS_TIME_H_MS = 180;  // H/H2-resolution max measurement time @ mtreg=69
+
+// Conversion constants (datasheet formulas)
+static constexpr float RESOLUTION_DIVISOR = 1.2f;  // counts to lux conversion divisor
+static constexpr float MODE_H2_DIVISOR = 2.0f;     // H2 mode has 2x higher resolution
+
+// MTreg calculation constants
+static constexpr int COUNTS_TARGET = 50000;  // Target counts for optimal range (avoid saturation)
+static constexpr int COUNTS_NUMERATOR = 10;
+static constexpr int COUNTS_DENOMINATOR = 12;
+
+// MTreg register bit manipulation constants
+static constexpr uint8_t MTREG_HI_SHIFT = 5;       // High 3 bits start at bit 5
+static constexpr uint8_t MTREG_HI_MASK = 0b111;    // 3-bit mask for high bits
+static constexpr uint8_t MTREG_LO_SHIFT = 0;       // Low 5 bits start at bit 0
+static constexpr uint8_t MTREG_LO_MASK = 0b11111;  // 5-bit mask for low bits
+
 /*
 bh1750 properties:

@@ -43,74 +68,7 @@ void BH1750Sensor::setup() {
    this->mark_failed();
    return;
  }
-}
-
-void BH1750Sensor::read_lx_(BH1750Mode mode, uint8_t mtreg, const std::function<void(float)> &f) {
-  // turn on (after one-shot sensor automatically powers down)
-  uint8_t turn_on = BH1750_COMMAND_POWER_ON;
-  if (this->write(&turn_on, 1) != i2c::ERROR_OK) {
-    ESP_LOGW(TAG, "Power on failed");
-    f(NAN);
-    return;
-  }
-
-  if (active_mtreg_ != mtreg) {
-    // set mtreg
-    uint8_t mtreg_hi = BH1750_COMMAND_MT_REG_HI | ((mtreg >> 5) & 0b111);
-    uint8_t mtreg_lo = BH1750_COMMAND_MT_REG_LO | ((mtreg >> 0) & 0b11111);
-    if (this->write(&mtreg_hi, 1) != i2c::ERROR_OK || this->write(&mtreg_lo, 1) != i2c::ERROR_OK) {
-      ESP_LOGW(TAG, "Set measurement time failed");
-      active_mtreg_ = 0;
-      f(NAN);
-      return;
-    }
-    active_mtreg_ = mtreg;
-  }
-
-  uint8_t cmd;
-  uint16_t meas_time;
-  switch (mode) {
-    case BH1750_MODE_L:
-      cmd = BH1750_COMMAND_ONE_TIME_L;
-      meas_time = 24 * mtreg / 69;
-      break;
-    case BH1750_MODE_H:
-      cmd = BH1750_COMMAND_ONE_TIME_H;
-      meas_time = 180 * mtreg / 69;
-      break;
-    case BH1750_MODE_H2:
-      cmd = BH1750_COMMAND_ONE_TIME_H2;
-      meas_time = 180 * mtreg / 69;
-      break;
-    default:
-      f(NAN);
-      return;
-  }
-  if (this->write(&cmd, 1) != i2c::ERROR_OK) {
-    ESP_LOGW(TAG, "Start measurement failed");
-    f(NAN);
-    return;
-  }
-
-  // probably not needed, but adjust for rounding
-  meas_time++;
-
-  this->set_timeout("read", meas_time, [this, mode, mtreg, f]() {
-    uint16_t raw_value;
-    if (this->read(reinterpret_cast<uint8_t *>(&raw_value), 2) != i2c::ERROR_OK) {
-      ESP_LOGW(TAG, "Read data failed");
-      f(NAN);
-      return;
-    }
-    raw_value = i2c::i2ctohs(raw_value);
-
-    float lx = float(raw_value) / 1.2f;
-    lx *= 69.0f / mtreg;
-    if (mode == BH1750_MODE_H2)
-      lx /= 2.0f;
-
-    f(lx);
-  });
+  this->state_ = IDLE;
 }

 void BH1750Sensor::dump_config() {
@@ -124,45 +82,189 @@ void BH1750Sensor::dump_config() {
 }

 void BH1750Sensor::update() {
-  // first do a quick measurement in L-mode with full range
-  // to find right range
-  this->read_lx_(BH1750_MODE_L, 31, [this](float val) {
-    if (std::isnan(val)) {
-      this->status_set_warning();
-      this->publish_state(NAN);
+  const uint32_t now = millis();
+
+  // Start coarse measurement to determine optimal mode/mtreg
+  if (this->state_ != IDLE) {
+    // Safety timeout: reset if stuck
+    if (now - this->measurement_start_time_ > MEASUREMENT_TIMEOUT_MS) {
+      ESP_LOGW(TAG, "Measurement timeout, resetting state");
+      this->state_ = IDLE;
+    } else {
+      ESP_LOGW(TAG, "Previous measurement not complete, skipping update");
      return;
    }
+  }

-    BH1750Mode use_mode;
-    uint8_t use_mtreg;
-    if (val <= 7000) {
-      use_mode = BH1750_MODE_H2;
-      use_mtreg = 254;
-    } else {
-      use_mode = BH1750_MODE_H;
-      // lx = counts / 1.2 * (69 / mtreg)
-      // -> mtreg = counts / 1.2 * (69 / lx)
-      // calculate for counts=50000 (allow some range to not saturate, but maximize mtreg)
-      // -> mtreg = 50000*(10/12)*(69/lx)
-      int ideal_mtreg = 50000 * 10 * 69 / (12 * (int) val);
-      use_mtreg = std::min(254, std::max(31, ideal_mtreg));
-    }
-    ESP_LOGV(TAG, "L result: %f -> Calculated mode=%d, mtreg=%d", val, (int) use_mode, use_mtreg);
+  if (!this->start_measurement_(BH1750_MODE_L, MTREG_MIN, now)) {
+    this->status_set_warning();
+    this->publish_state(NAN);
+    return;
+  }

-    this->read_lx_(use_mode, use_mtreg, [this](float val) {
-      if (std::isnan(val)) {
-        this->status_set_warning();
-        this->publish_state(NAN);
-        return;
+  this->state_ = WAITING_COARSE_MEASUREMENT;
+  this->enable_loop();  // Enable loop while measurement in progress
+}
+
+void BH1750Sensor::loop() {
+  const uint32_t now = App.get_loop_component_start_time();
+
+  switch (this->state_) {
+    case IDLE:
+      // Disable loop when idle to save cycles
+      this->disable_loop();
+      break;
+
+    case WAITING_COARSE_MEASUREMENT:
+      if (now - this->measurement_start_time_ >= this->measurement_duration_) {
+        this->state_ = READING_COARSE_RESULT;
      }
-      ESP_LOGD(TAG, "'%s': Illuminance=%.1flx", this->get_name().c_str(), val);
+      break;
+
+    case READING_COARSE_RESULT: {
+      float lx;
+      if (!this->read_measurement_(lx)) {
+        this->fail_and_reset_();
+        break;
+      }
+
+      this->process_coarse_result_(lx);
+
+      // Start fine measurement with optimal settings
+      // fetch millis() again since the read can take a bit
+      if (!this->start_measurement_(this->fine_mode_, this->fine_mtreg_, millis())) {
+        this->fail_and_reset_();
+        break;
+      }
+
+      this->state_ = WAITING_FINE_MEASUREMENT;
+      break;
+    }
+
+    case WAITING_FINE_MEASUREMENT:
+      if (now - this->measurement_start_time_ >= this->measurement_duration_) {
+        this->state_ = READING_FINE_RESULT;
+      }
+      break;
+
+    case READING_FINE_RESULT: {
+      float lx;
+      if (!this->read_measurement_(lx)) {
+        this->fail_and_reset_();
+        break;
+      }
+
+      ESP_LOGD(TAG, "'%s': Illuminance=%.1flx", this->get_name().c_str(), lx);
      this->status_clear_warning();
-      this->publish_state(val);
-    });
-  });
+      this->publish_state(lx);
+      this->state_ = IDLE;
+      break;
+    }
+  }
+}
+
+bool BH1750Sensor::start_measurement_(BH1750Mode mode, uint8_t mtreg, uint32_t now) {
+  // Power on
+  uint8_t turn_on = BH1750_COMMAND_POWER_ON;
+  if (this->write(&turn_on, 1) != i2c::ERROR_OK) {
+    ESP_LOGW(TAG, "Power on failed");
+    return false;
+  }
+
+  // Set MTreg if changed
+  if (this->active_mtreg_ != mtreg) {
+    uint8_t mtreg_hi = BH1750_COMMAND_MT_REG_HI | ((mtreg >> MTREG_HI_SHIFT) & MTREG_HI_MASK);
+    uint8_t mtreg_lo = BH1750_COMMAND_MT_REG_LO | ((mtreg >> MTREG_LO_SHIFT) & MTREG_LO_MASK);
+    if (this->write(&mtreg_hi, 1) != i2c::ERROR_OK || this->write(&mtreg_lo, 1) != i2c::ERROR_OK) {
+      ESP_LOGW(TAG, "Set measurement time failed");
+      this->active_mtreg_ = 0;
+      return false;
+    }
+    this->active_mtreg_ = mtreg;
+  }
+
+  // Start measurement
+  uint8_t cmd;
+  uint16_t meas_time;
+  switch (mode) {
+    case BH1750_MODE_L:
+      cmd = BH1750_COMMAND_ONE_TIME_L;
+      meas_time = MEAS_TIME_L_MS * mtreg / MTREG_DEFAULT;
+      break;
+    case BH1750_MODE_H:
+      cmd = BH1750_COMMAND_ONE_TIME_H;
+      meas_time = MEAS_TIME_H_MS * mtreg / MTREG_DEFAULT;
+      break;
+    case BH1750_MODE_H2:
+      cmd = BH1750_COMMAND_ONE_TIME_H2;
+      meas_time = MEAS_TIME_H_MS * mtreg / MTREG_DEFAULT;
+      break;
+    default:
+      return false;
+  }
+
+  if (this->write(&cmd, 1) != i2c::ERROR_OK) {
+    ESP_LOGW(TAG, "Start measurement failed");
+    return false;
+  }
+
+  // Store current measurement parameters
+  this->current_mode_ = mode;
+  this->current_mtreg_ = mtreg;
+  this->measurement_start_time_ = now;
+  this->measurement_duration_ = meas_time + 1;  // Add 1ms for safety
+
+  return true;
+}
+
+bool BH1750Sensor::read_measurement_(float &lx_out) {
+  uint16_t raw_value;
+  if (this->read(reinterpret_cast<uint8_t *>(&raw_value), 2) != i2c::ERROR_OK) {
+    ESP_LOGW(TAG, "Read data failed");
+    return false;
+  }
+  raw_value = i2c::i2ctohs(raw_value);
+
+  float lx = float(raw_value) / RESOLUTION_DIVISOR;
+  lx *= float(MTREG_DEFAULT) / this->current_mtreg_;
+  if (this->current_mode_ == BH1750_MODE_H2) {
+    lx /= MODE_H2_DIVISOR;
+  }
+
+  lx_out = lx;
+  return true;
+}
+
+void BH1750Sensor::process_coarse_result_(float lx) {
+  if (std::isnan(lx)) {
+    // Use defaults if coarse measurement failed
+    this->fine_mode_ = BH1750_MODE_H2;
+    this->fine_mtreg_ = MTREG_MAX;
+    return;
+  }
+
+  if (lx <= HIGH_LIGHT_THRESHOLD_LX) {
+    this->fine_mode_ = BH1750_MODE_H2;
+    this->fine_mtreg_ = MTREG_MAX;
+  } else {
+    this->fine_mode_ = BH1750_MODE_H;
+    // lx = counts / 1.2 * (69 / mtreg)
+    // -> mtreg = counts / 1.2 * (69 / lx)
+    // calculate for counts=50000 (allow some range to not saturate, but maximize mtreg)
+    // -> mtreg = 50000*(10/12)*(69/lx)
+    int ideal_mtreg = COUNTS_TARGET * COUNTS_NUMERATOR * MTREG_DEFAULT / (COUNTS_DENOMINATOR * (int) lx);
+    this->fine_mtreg_ = std::min((int) MTREG_MAX, std::max((int) MTREG_MIN, ideal_mtreg));
+  }
+
+  ESP_LOGV(TAG, "L result: %.1f -> Calculated mode=%d, mtreg=%d", lx, (int) this->fine_mode_, this->fine_mtreg_);
+}
+
+void BH1750Sensor::fail_and_reset_() {
+  this->status_set_warning();
+  this->publish_state(NAN);
+  this->state_ = IDLE;
 }

 float BH1750Sensor::get_setup_priority() const { return setup_priority::DATA; }

-}  // namespace bh1750
-}  // namespace esphome
+}  // namespace esphome::bh1750
--- a/esphome/components/bh1750/bh1750.h
+++ b/esphome/components/bh1750/bh1750.h
@@ -4,10 +4,9 @@
 #include "esphome/components/sensor/sensor.h"
 #include "esphome/components/i2c/i2c.h"

-namespace esphome {
-namespace bh1750 {
+namespace esphome::bh1750 {

-enum BH1750Mode {
+enum BH1750Mode : uint8_t {
  BH1750_MODE_L,
  BH1750_MODE_H,
  BH1750_MODE_H2,
@@ -21,13 +20,36 @@ class BH1750Sensor : public sensor::Sensor, public PollingComponent, public i2c:
  void setup() override;
  void dump_config() override;
  void update() override;
+  void loop() override;
  float get_setup_priority() const override;

 protected:
-  void read_lx_(BH1750Mode mode, uint8_t mtreg, const std::function<void(float)> &f);
+  // State machine states
+  enum State : uint8_t {
+    IDLE,
+    WAITING_COARSE_MEASUREMENT,
+    READING_COARSE_RESULT,
+    WAITING_FINE_MEASUREMENT,
+    READING_FINE_RESULT,
+  };

+  // 4-byte aligned members
+  uint32_t measurement_start_time_{0};
+  uint32_t measurement_duration_{0};
+
+  // 1-byte members grouped together to minimize padding
+  State state_{IDLE};
+  BH1750Mode current_mode_{BH1750_MODE_L};
+  uint8_t current_mtreg_{31};
+  BH1750Mode fine_mode_{BH1750_MODE_H2};
+  uint8_t fine_mtreg_{254};
  uint8_t active_mtreg_{0};
+
+  // Helper methods
+  bool start_measurement_(BH1750Mode mode, uint8_t mtreg, uint32_t now);
+  bool read_measurement_(float &lx_out);
+  void process_coarse_result_(float lx);
+  void fail_and_reset_();
 };

-}  // namespace bh1750
-}  // namespace esphome
+}  // namespace esphome::bh1750
--- a/esphome/components/bh1750/sensor.py
+++ b/esphome/components/bh1750/sensor.py
@@ -20,16 +20,6 @@ CONFIG_SCHEMA = (
        device_class=DEVICE_CLASS_ILLUMINANCE,
        state_class=STATE_CLASS_MEASUREMENT,
    )
-    .extend(
-        {
-            cv.Optional("resolution"): cv.invalid(
-                "The 'resolution' option has been removed. The optimal value is now dynamically calculated."
-            ),
-            cv.Optional("measurement_duration"): cv.invalid(
-                "The 'measurement_duration' option has been removed. The optimal value is now dynamically calculated."
-            ),
-        }
-    )
    .extend(cv.polling_component_schema("60s"))
    .extend(i2c.i2c_device_schema(0x23))
 )
--- a/esphome/components/binary_sensor/init.py
+++ b/esphome/components/binary_sensor/init.py
@@ -3,7 +3,7 @@ from logging import getLogger
 from esphome import automation, core
 from esphome.automation import Condition, maybe_simple_id
 import esphome.codegen as cg
-from esphome.components import mqtt, web_server
+from esphome.components import mqtt, web_server, zigbee
 from esphome.components.const import CONF_ON_STATE_CHANGE
 import esphome.config_validation as cv
 from esphome.const import (
@@ -439,6 +439,7 @@ def validate_publish_initial_state(value):
 _BINARY_SENSOR_SCHEMA = (
    cv.ENTITY_BASE_SCHEMA.extend(web_server.WEBSERVER_SORTING_SCHEMA)
    .extend(cv.MQTT_COMPONENT_SCHEMA)
+    .extend(zigbee.BINARY_SENSOR_SCHEMA)
    .extend(
        {
            cv.GenerateID(): cv.declare_id(BinarySensor),
@@ -520,6 +521,7 @@ _BINARY_SENSOR_SCHEMA = (


 _BINARY_SENSOR_SCHEMA.add_extra(entity_duplicate_validator("binary_sensor"))
+_BINARY_SENSOR_SCHEMA.add_extra(zigbee.validate_binary_sensor)


 def binary_sensor_schema(
@@ -621,6 +623,8 @@ async def setup_binary_sensor_core_(var, config):
    if web_server_config := config.get(CONF_WEB_SERVER):
        await web_server.add_entity_config(var, web_server_config)

+    await zigbee.setup_binary_sensor(var, config)
+

 async def register_binary_sensor(var, config):
    if not CORE.has_id(config[CONF_ID]):
--- a/esphome/components/binary_sensor/automation.cpp
+++ b/esphome/components/binary_sensor/automation.cpp
@@ -21,8 +21,10 @@ void MultiClickTrigger::on_state_(bool state) {
    // Start matching
    MultiClickTriggerEvent evt = this->timing_[0];
    if (evt.state == state) {
-      ESP_LOGV(TAG, "START min=%" PRIu32 " max=%" PRIu32, evt.min_length, evt.max_length);
-      ESP_LOGV(TAG, "Multi Click: Starting multi click action!");
+      ESP_LOGV(TAG,
+               "START min=%" PRIu32 " max=%" PRIu32 "\n"
+               "Multi Click: Starting multi click action!",
+               evt.min_length, evt.max_length);
      this->at_index_ = 1;
      if (this->timing_.size() == 1 && evt.max_length == 4294967294UL) {
        this->set_timeout("trigger", evt.min_length, [this]() { this->trigger_(); });
--- a/esphome/components/ble_client/automation.h
+++ b/esphome/components/ble_client/automation.h
@@ -7,8 +7,12 @@

 #include "esphome/core/automation.h"
 #include "esphome/components/ble_client/ble_client.h"
+#include "esphome/core/helpers.h"
 #include "esphome/core/log.h"

+// Maximum bytes to log in hex format for BLE writes (many logging buffers are 256 chars)
+static constexpr size_t BLE_WRITE_MAX_LOG_BYTES = 64;
+
 namespace esphome::ble_client {

 // placeholder class for static TAG .
@@ -151,7 +155,10 @@ template<typename... Ts> class BLEClientWriteAction : public Action<Ts...>, publ
      esph_log_w(Automation::TAG, "Cannot write to BLE characteristic - not connected");
      return false;
    }
-    esph_log_vv(Automation::TAG, "Will write %d bytes: %s", len, format_hex_pretty(data, len).c_str());
+#if ESPHOME_LOG_LEVEL >= ESPHOME_LOG_LEVEL_VERY_VERBOSE
+    char hex_buf[format_hex_pretty_size(BLE_WRITE_MAX_LOG_BYTES)];
+    esph_log_vv(Automation::TAG, "Will write %d bytes: %s", len, format_hex_pretty_to(hex_buf, data, len));
+#endif
    esp_err_t err =
        esp_ble_gattc_write_char(this->parent()->get_gattc_if(), this->parent()->get_conn_id(), this->char_handle_, len,
                                 const_cast<uint8_t *>(data), this->write_type_, ESP_GATT_AUTH_REQ_NONE);
@@ -179,8 +186,10 @@ template<typename... Ts> class BLEClientWriteAction : public Action<Ts...>, publ
      case ESP_GATTC_SEARCH_CMPL_EVT: {
        auto *chr = this->parent()->get_characteristic(this->service_uuid_, this->char_uuid_);
        if (chr == nullptr) {
+          char char_buf[esp32_ble::UUID_STR_LEN];
+          char service_buf[esp32_ble::UUID_STR_LEN];
          esph_log_w("ble_write_action", "Characteristic %s was not found in service %s",
-                     this->char_uuid_.to_string().c_str(), this->service_uuid_.to_string().c_str());
+                     this->char_uuid_.to_str(char_buf), this->service_uuid_.to_str(service_buf));
          break;
        }
        this->char_handle_ = chr->handle;
@@ -192,11 +201,13 @@ template<typename... Ts> class BLEClientWriteAction : public Action<Ts...>, publ
          this->write_type_ = ESP_GATT_WRITE_TYPE_NO_RSP;
          esph_log_d(Automation::TAG, "Write type: ESP_GATT_WRITE_TYPE_NO_RSP");
        } else {
-          esph_log_e(Automation::TAG, "Characteristic %s does not allow writing", this->char_uuid_.to_string().c_str());
+          char char_buf[esp32_ble::UUID_STR_LEN];
+          esph_log_e(Automation::TAG, "Characteristic %s does not allow writing", this->char_uuid_.to_str(char_buf));
          break;
        }
        this->node_state = espbt::ClientState::ESTABLISHED;
-        esph_log_d(Automation::TAG, "Found characteristic %s on device %s", this->char_uuid_.to_string().c_str(),
+        char char_buf[esp32_ble::UUID_STR_LEN];
+        esph_log_d(Automation::TAG, "Found characteristic %s on device %s", this->char_uuid_.to_str(char_buf),
                   ble_client_->address_str());
        break;
      }
--- a/esphome/components/ble_client/output/ble_binary_output.cpp
+++ b/esphome/components/ble_client/output/ble_binary_output.cpp
@@ -9,12 +9,15 @@ static const char *const TAG = "ble_binary_output";

 void BLEBinaryOutput::dump_config() {
  ESP_LOGCONFIG(TAG, "BLE Binary Output:");
+  char service_buf[esp32_ble::UUID_STR_LEN];
+  char char_buf[esp32_ble::UUID_STR_LEN];
+  this->service_uuid_.to_str(service_buf);
+  this->char_uuid_.to_str(char_buf);
  ESP_LOGCONFIG(TAG,
                "  MAC address        : %s\n"
                "  Service UUID       : %s\n"
                "  Characteristic UUID: %s",
-                this->parent_->address_str(), this->service_uuid_.to_string().c_str(),
-                this->char_uuid_.to_string().c_str());
+                this->parent_->address_str(), service_buf, char_buf);
  LOG_BINARY_OUTPUT(this);
 }

@@ -24,8 +27,10 @@ void BLEBinaryOutput::gattc_event_handler(esp_gattc_cb_event_t event, esp_gatt_i
    case ESP_GATTC_SEARCH_CMPL_EVT: {
      auto *chr = this->parent()->get_characteristic(this->service_uuid_, this->char_uuid_);
      if (chr == nullptr) {
-        ESP_LOGW(TAG, "Characteristic %s was not found in service %s", this->char_uuid_.to_string().c_str(),
-                 this->service_uuid_.to_string().c_str());
+        char char_buf[esp32_ble::UUID_STR_LEN];
+        char service_buf[esp32_ble::UUID_STR_LEN];
+        ESP_LOGW(TAG, "Characteristic %s was not found in service %s", this->char_uuid_.to_str(char_buf),
+                 this->service_uuid_.to_str(service_buf));
        break;
      }
      this->char_handle_ = chr->handle;
@@ -37,20 +42,24 @@ void BLEBinaryOutput::gattc_event_handler(esp_gattc_cb_event_t event, esp_gatt_i
        this->write_type_ = ESP_GATT_WRITE_TYPE_NO_RSP;
        ESP_LOGD(TAG, "Write type: ESP_GATT_WRITE_TYPE_NO_RSP");
      } else {
-        ESP_LOGE(TAG, "Characteristic %s does not allow writing with%s response", this->char_uuid_.to_string().c_str(),
+        char char_buf[esp32_ble::UUID_STR_LEN];
+        ESP_LOGE(TAG, "Characteristic %s does not allow writing with%s response", this->char_uuid_.to_str(char_buf),
                 this->require_response_ ? "" : "out");
        break;
      }
      this->node_state = espbt::ClientState::ESTABLISHED;
-      ESP_LOGD(TAG, "Found characteristic %s on device %s", this->char_uuid_.to_string().c_str(),
+      char char_buf[esp32_ble::UUID_STR_LEN];
+      ESP_LOGD(TAG, "Found characteristic %s on device %s", this->char_uuid_.to_str(char_buf),
               this->parent()->address_str());
      this->node_state = espbt::ClientState::ESTABLISHED;
      break;
    }
    case ESP_GATTC_WRITE_CHAR_EVT: {
      if (param->write.handle == this->char_handle_) {
-        if (param->write.status != 0)
-          ESP_LOGW(TAG, "[%s] Write error, status=%d", this->char_uuid_.to_string().c_str(), param->write.status);
+        if (param->write.status != 0) {
+          char char_buf[esp32_ble::UUID_STR_LEN];
+          ESP_LOGW(TAG, "[%s] Write error, status=%d", this->char_uuid_.to_str(char_buf), param->write.status);
+        }
      }
      break;
    }
@@ -60,18 +69,19 @@ void BLEBinaryOutput::gattc_event_handler(esp_gattc_cb_event_t event, esp_gatt_i
 }

 void BLEBinaryOutput::write_state(bool state) {
+  char char_buf[esp32_ble::UUID_STR_LEN];
  if (this->node_state != espbt::ClientState::ESTABLISHED) {
    ESP_LOGW(TAG, "[%s] Not connected to BLE client.  State update can not be written.",
-             this->char_uuid_.to_string().c_str());
+             this->char_uuid_.to_str(char_buf));
    return;
  }
  uint8_t state_as_uint = (uint8_t) state;
-  ESP_LOGV(TAG, "[%s] Write State: %d", this->char_uuid_.to_string().c_str(), state_as_uint);
+  ESP_LOGV(TAG, "[%s] Write State: %d", this->char_uuid_.to_str(char_buf), state_as_uint);
  esp_err_t err =
      esp_ble_gattc_write_char(this->parent()->get_gattc_if(), this->parent()->get_conn_id(), this->char_handle_,
                               sizeof(state_as_uint), &state_as_uint, this->write_type_, ESP_GATT_AUTH_REQ_NONE);
  if (err != ESP_GATT_OK)
-    ESP_LOGW(TAG, "[%s] Write error, err=%d", this->char_uuid_.to_string().c_str(), err);
+    ESP_LOGW(TAG, "[%s] Write error, err=%d", this->char_uuid_.to_str(char_buf), err);
 }

 }  // namespace esphome::ble_client
--- a/esphome/components/ble_client/sensor/ble_sensor.cpp
+++ b/esphome/components/ble_client/sensor/ble_sensor.cpp
@@ -18,14 +18,17 @@ void BLESensor::loop() {

 void BLESensor::dump_config() {
  LOG_SENSOR("", "BLE Sensor", this);
+  char service_buf[esp32_ble::UUID_STR_LEN];
+  char char_buf[esp32_ble::UUID_STR_LEN];
+  char descr_buf[esp32_ble::UUID_STR_LEN];
  ESP_LOGCONFIG(TAG,
                "  MAC address        : %s\n"
                "  Service UUID       : %s\n"
                "  Characteristic UUID: %s\n"
                "  Descriptor UUID    : %s\n"
                "  Notifications      : %s",
-                this->parent()->address_str(), this->service_uuid_.to_string().c_str(),
-                this->char_uuid_.to_string().c_str(), this->descr_uuid_.to_string().c_str(), YESNO(this->notify_));
+                this->parent()->address_str(), this->service_uuid_.to_str(service_buf),
+                this->char_uuid_.to_str(char_buf), this->descr_uuid_.to_str(descr_buf), YESNO(this->notify_));
  LOG_UPDATE_INTERVAL(this);
 }

@@ -51,8 +54,10 @@ void BLESensor::gattc_event_handler(esp_gattc_cb_event_t event, esp_gatt_if_t ga
      if (chr == nullptr) {
        this->status_set_warning();
        this->publish_state(NAN);
-        ESP_LOGW(TAG, "No sensor characteristic found at service %s char %s", this->service_uuid_.to_string().c_str(),
-                 this->char_uuid_.to_string().c_str());
+        char service_buf[esp32_ble::UUID_STR_LEN];
+        char char_buf[esp32_ble::UUID_STR_LEN];
+        ESP_LOGW(TAG, "No sensor characteristic found at service %s char %s", this->service_uuid_.to_str(service_buf),
+                 this->char_uuid_.to_str(char_buf));
        break;
      }
      this->handle = chr->handle;
@@ -61,9 +66,12 @@ void BLESensor::gattc_event_handler(esp_gattc_cb_event_t event, esp_gatt_if_t ga
        if (descr == nullptr) {
          this->status_set_warning();
          this->publish_state(NAN);
+          char service_buf[esp32_ble::UUID_STR_LEN];
+          char char_buf[esp32_ble::UUID_STR_LEN];
+          char descr_buf[esp32_ble::UUID_STR_LEN];
          ESP_LOGW(TAG, "No sensor descriptor found at service %s char %s descr %s",
-                   this->service_uuid_.to_string().c_str(), this->char_uuid_.to_string().c_str(),
-                   this->descr_uuid_.to_string().c_str());
+                   this->service_uuid_.to_str(service_buf), this->char_uuid_.to_str(char_buf),
+                   this->descr_uuid_.to_str(descr_buf));
          break;
        }
        this->handle = descr->handle;
@@ -109,7 +117,8 @@ void BLESensor::gattc_event_handler(esp_gattc_cb_event_t event, esp_gatt_if_t ga
          break;
        }
        this->node_state = espbt::ClientState::ESTABLISHED;
-        ESP_LOGD(TAG, "Register for notify on %s complete", this->char_uuid_.to_string().c_str());
+        char char_buf[esp32_ble::UUID_STR_LEN];
+        ESP_LOGD(TAG, "Register for notify on %s complete", this->char_uuid_.to_str(char_buf));
      }
      break;
    }
--- a/esphome/components/ble_client/text_sensor/automation.h
+++ b/esphome/components/ble_client/text_sensor/automation.h
@@ -21,7 +21,7 @@ class BLETextSensorNotifyTrigger : public Trigger<std::string>, public BLETextSe
        if (param->notify.conn_id != this->sensor_->parent()->get_conn_id() ||
            param->notify.handle != this->sensor_->handle)
          break;
-        this->trigger(this->sensor_->parse_data(param->notify.value, param->notify.value_len));
+        this->trigger(std::string(reinterpret_cast<const char *>(param->notify.value), param->notify.value_len));
      }
      default:
        break;
--- a/esphome/components/ble_client/text_sensor/ble_text_sensor.cpp
+++ b/esphome/components/ble_client/text_sensor/ble_text_sensor.cpp
@@ -11,8 +11,6 @@ namespace esphome::ble_client {

 static const char *const TAG = "ble_text_sensor";

-static const std::string EMPTY = "";
-
 void BLETextSensor::loop() {
  // Parent BLEClientNode has a loop() method, but this component uses
  // polling via update() and BLE callbacks so loop isn't needed
@@ -21,14 +19,17 @@ void BLETextSensor::loop() {

 void BLETextSensor::dump_config() {
  LOG_TEXT_SENSOR("", "BLE Text Sensor", this);
+  char service_buf[esp32_ble::UUID_STR_LEN];
+  char char_buf[esp32_ble::UUID_STR_LEN];
+  char descr_buf[esp32_ble::UUID_STR_LEN];
  ESP_LOGCONFIG(TAG,
                "  MAC address        : %s\n"
                "  Service UUID       : %s\n"
                "  Characteristic UUID: %s\n"
                "  Descriptor UUID    : %s\n"
                "  Notifications      : %s",
-                this->parent()->address_str(), this->service_uuid_.to_string().c_str(),
-                this->char_uuid_.to_string().c_str(), this->descr_uuid_.to_string().c_str(), YESNO(this->notify_));
+                this->parent()->address_str(), this->service_uuid_.to_str(service_buf),
+                this->char_uuid_.to_str(char_buf), this->descr_uuid_.to_str(descr_buf), YESNO(this->notify_));
  LOG_UPDATE_INTERVAL(this);
 }

@@ -44,7 +45,7 @@ void BLETextSensor::gattc_event_handler(esp_gattc_cb_event_t event, esp_gatt_if_
    }
    case ESP_GATTC_CLOSE_EVT: {
      this->status_set_warning();
-      this->publish_state(EMPTY);
+      this->publish_state("");
      break;
    }
    case ESP_GATTC_SEARCH_CMPL_EVT: {
@@ -52,9 +53,11 @@ void BLETextSensor::gattc_event_handler(esp_gattc_cb_event_t event, esp_gatt_if_
      auto *chr = this->parent()->get_characteristic(this->service_uuid_, this->char_uuid_);
      if (chr == nullptr) {
        this->status_set_warning();
-        this->publish_state(EMPTY);
-        ESP_LOGW(TAG, "No sensor characteristic found at service %s char %s", this->service_uuid_.to_string().c_str(),
-                 this->char_uuid_.to_string().c_str());
+        this->publish_state("");
+        char service_buf[esp32_ble::UUID_STR_LEN];
+        char char_buf[esp32_ble::UUID_STR_LEN];
+        ESP_LOGW(TAG, "No sensor characteristic found at service %s char %s", this->service_uuid_.to_str(service_buf),
+                 this->char_uuid_.to_str(char_buf));
        break;
      }
      this->handle = chr->handle;
@@ -62,10 +65,13 @@ void BLETextSensor::gattc_event_handler(esp_gattc_cb_event_t event, esp_gatt_if_
        auto *descr = chr->get_descriptor(this->descr_uuid_);
        if (descr == nullptr) {
          this->status_set_warning();
-          this->publish_state(EMPTY);
+          this->publish_state("");
+          char service_buf[esp32_ble::UUID_STR_LEN];
+          char char_buf[esp32_ble::UUID_STR_LEN];
+          char descr_buf[esp32_ble::UUID_STR_LEN];
          ESP_LOGW(TAG, "No sensor descriptor found at service %s char %s descr %s",
-                   this->service_uuid_.to_string().c_str(), this->char_uuid_.to_string().c_str(),
-                   this->descr_uuid_.to_string().c_str());
+                   this->service_uuid_.to_str(service_buf), this->char_uuid_.to_str(char_buf),
+                   this->descr_uuid_.to_str(descr_buf));
          break;
        }
        this->handle = descr->handle;
@@ -91,7 +97,7 @@ void BLETextSensor::gattc_event_handler(esp_gattc_cb_event_t event, esp_gatt_if_
          break;
        }
        this->status_clear_warning();
-        this->publish_state(this->parse_data(param->read.value, param->read.value_len));
+        this->publish_state(reinterpret_cast<const char *>(param->read.value), param->read.value_len);
      }
      break;
    }
@@ -100,7 +106,7 @@ void BLETextSensor::gattc_event_handler(esp_gattc_cb_event_t event, esp_gatt_if_
        break;
      ESP_LOGV(TAG, "[%s] ESP_GATTC_NOTIFY_EVT: handle=0x%x, value=0x%x", this->get_name().c_str(),
               param->notify.handle, param->notify.value[0]);
-      this->publish_state(this->parse_data(param->notify.value, param->notify.value_len));
+      this->publish_state(reinterpret_cast<const char *>(param->notify.value), param->notify.value_len);
      break;
    }
    case ESP_GATTC_REG_FOR_NOTIFY_EVT: {
@@ -113,11 +119,6 @@ void BLETextSensor::gattc_event_handler(esp_gattc_cb_event_t event, esp_gatt_if_
  }
 }

-std::string BLETextSensor::parse_data(uint8_t *value, uint16_t value_len) {
-  std::string text(value, value + value_len);
-  return text;
-}
-
 void BLETextSensor::update() {
  if (this->node_state != espbt::ClientState::ESTABLISHED) {
    ESP_LOGW(TAG, "[%s] Cannot poll, not connected", this->get_name().c_str());
@@ -132,7 +133,7 @@ void BLETextSensor::update() {
                                        ESP_GATT_AUTH_REQ_NONE);
  if (status) {
    this->status_set_warning();
-    this->publish_state(EMPTY);
+    this->publish_state("");
    ESP_LOGW(TAG, "[%s] Error sending read request for sensor, status=%d", this->get_name().c_str(), status);
  }
 }
--- a/esphome/components/ble_client/text_sensor/ble_text_sensor.h
+++ b/esphome/components/ble_client/text_sensor/ble_text_sensor.h
@@ -29,7 +29,6 @@ class BLETextSensor : public text_sensor::TextSensor, public PollingComponent, p
  void set_descr_uuid32(uint32_t uuid) { this->descr_uuid_ = espbt::ESPBTUUID::from_uint32(uuid); }
  void set_descr_uuid128(uint8_t *uuid) { this->descr_uuid_ = espbt::ESPBTUUID::from_raw(uuid); }
  void set_enable_notify(bool notify) { this->notify_ = notify; }
-  std::string parse_data(uint8_t *value, uint16_t value_len);
  uint16_t handle;

 protected:
--- a/esphome/components/ble_nus/ble_nus.cpp
+++ b/esphome/components/ble_nus/ble_nus.cpp
@@ -103,8 +103,10 @@ void BLENUS::on_log(uint8_t level, const char *tag, const char *message, size_t
 #endif

 void BLENUS::dump_config() {
-  ESP_LOGCONFIG(TAG, "ble nus:");
-  ESP_LOGCONFIG(TAG, "  log: %s", YESNO(this->expose_log_));
+  ESP_LOGCONFIG(TAG,
+                "ble nus:\n"
+                "  log: %s",
+                YESNO(this->expose_log_));
  uint32_t mtu = 0;
  bt_conn *conn = this->conn_.load();
  if (conn) {
--- a/Show More
+++ b/Show More