Merge remote-tracking branch 'upstream/dev' into mqtt_enum_flash

# Conflicts:
#	esphome/components/mqtt/mqtt_alarm_control_panel.cpp
#	esphome/components/mqtt/mqtt_component.cpp
#	esphome/components/mqtt/mqtt_component.h
#	esphome/components/mqtt/mqtt_cover.cpp
#	esphome/components/mqtt/mqtt_valve.cpp

.clang-tidy.hash

@@ -1 +1 @@
-15dc295268b2dcf75942f42759b3ddec64eba89f75525698eb39c95a7f4b14ce
+d565b0589e35e692b5f2fc0c14723a99595b4828a3a3ef96c442e86a23176c00

.github/workflows/codeql.yml

@@ -58,7 +58,7 @@ jobs:
 
       # Initializes the CodeQL tools for scanning.
       - name: Initialize CodeQL
-        uses: github/codeql-action/init@19b2f06db2b6f5108140aeb04014ef02b648f789 # v4.31.11
+        uses: github/codeql-action/init@b20883b0cd1f46c72ae0ba6d1090936928f9fa30 # v4.32.0
         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@19b2f06db2b6f5108140aeb04014ef02b648f789 # v4.31.11
+        uses: github/codeql-action/analyze@b20883b0cd1f46c72ae0ba6d1090936928f9fa30 # v4.32.0
         with:
           category: "/language:${{matrix.language}}"

esphome/components/cover/cover.cpp

@@ -1,11 +1,11 @@
 #include "cover.h"
 #include "esphome/core/defines.h"
 #include "esphome/core/controller_registry.h"
+#include "esphome/core/log.h"
+#include "esphome/core/progmem.h"
 
 #include <strings.h>
 
-#include "esphome/core/log.h"
-
 namespace esphome::cover {
 
 static const char *const TAG = "cover";
@@ -39,13 +39,13 @@ Cover::Cover() : position{COVER_OPEN} {}
 
 CoverCall::CoverCall(Cover *parent) : parent_(parent) {}
 CoverCall &CoverCall::set_command(const char *command) {
-  if (strcasecmp(command, "OPEN") == 0) {
+  if (ESPHOME_strcasecmp_P(command, ESPHOME_PSTR("OPEN")) == 0) {
     this->set_command_open();
-  } else if (strcasecmp(command, "CLOSE") == 0) {
+  } else if (ESPHOME_strcasecmp_P(command, ESPHOME_PSTR("CLOSE")) == 0) {
     this->set_command_close();
-  } else if (strcasecmp(command, "STOP") == 0) {
+  } else if (ESPHOME_strcasecmp_P(command, ESPHOME_PSTR("STOP")) == 0) {
     this->set_command_stop();
-  } else if (strcasecmp(command, "TOGGLE") == 0) {
+  } else if (ESPHOME_strcasecmp_P(command, ESPHOME_PSTR("TOGGLE")) == 0) {
     this->set_command_toggle();
   } else {
     ESP_LOGW(TAG, "'%s' - Unrecognized command %s", this->parent_->get_name().c_str(), command);

esphome/components/esp32_hosted/__init__.py

@@ -12,6 +12,7 @@ from esphome.const import (
     KEY_FRAMEWORK_VERSION,
 )
 from esphome.core import CORE
+from esphome.cpp_generator import add_define
 
 CODEOWNERS = ["@swoboda1337"]
 
@@ -42,6 +43,7 @@ CONFIG_SCHEMA = cv.All(
 
 
 async def to_code(config):
+    add_define("USE_ESP32_HOSTED")
     if config[CONF_ACTIVE_HIGH]:
         esp32.add_idf_sdkconfig_option(
             "CONFIG_ESP_HOSTED_SDIO_RESET_ACTIVE_HIGH",

esphome/components/http_request/__init__.py

@@ -126,7 +126,7 @@ CONFIG_SCHEMA = cv.All(
             ),
             cv.Optional(CONF_CA_CERTIFICATE_PATH): cv.All(
                 cv.file_,
-                cv.only_on(PLATFORM_HOST),
+                cv.Any(cv.only_on(PLATFORM_HOST), cv.only_on_esp32),
             ),
         }
     ).extend(cv.COMPONENT_SCHEMA),
@@ -160,7 +160,14 @@ async def to_code(config):
         cg.add(var.set_verify_ssl(config[CONF_VERIFY_SSL]))
 
         if config.get(CONF_VERIFY_SSL):
-            esp32.add_idf_sdkconfig_option("CONFIG_MBEDTLS_CERTIFICATE_BUNDLE", True)
+            if ca_cert_path := config.get(CONF_CA_CERTIFICATE_PATH):
+                with open(ca_cert_path, encoding="utf-8") as f:
+                    ca_cert_content = f.read()
+                cg.add(var.set_ca_certificate(ca_cert_content))
+            else:
+                esp32.add_idf_sdkconfig_option(
+                    "CONFIG_MBEDTLS_CERTIFICATE_BUNDLE", True
+                )
 
         esp32.add_idf_sdkconfig_option(
             "CONFIG_ESP_TLS_INSECURE",

esphome/components/http_request/http_request_idf.cpp

@@ -27,8 +27,9 @@ void HttpRequestIDF::dump_config() {
   HttpRequestComponent::dump_config();
   ESP_LOGCONFIG(TAG,
                 "  Buffer Size RX: %u\n"
-                "  Buffer Size TX: %u",
-                this->buffer_size_rx_, this->buffer_size_tx_);
+                "  Buffer Size TX: %u\n"
+                "  Custom CA Certificate: %s",
+                this->buffer_size_rx_, this->buffer_size_tx_, YESNO(this->ca_certificate_ != nullptr));
 }
 
 esp_err_t HttpRequestIDF::http_event_handler(esp_http_client_event_t *evt) {
@@ -88,11 +89,15 @@ std::shared_ptr<HttpContainer> HttpRequestIDF::perform(const std::string &url, c
   config.disable_auto_redirect = !this->follow_redirects_;
   config.max_redirection_count = this->redirect_limit_;
   config.auth_type = HTTP_AUTH_TYPE_BASIC;
-#if CONFIG_MBEDTLS_CERTIFICATE_BUNDLE
   if (secure && this->verify_ssl_) {
-    config.crt_bundle_attach = esp_crt_bundle_attach;
-  }
+    if (this->ca_certificate_ != nullptr) {
+      config.cert_pem = this->ca_certificate_;
+#if CONFIG_MBEDTLS_CERTIFICATE_BUNDLE
+    } else {
+      config.crt_bundle_attach = esp_crt_bundle_attach;
 #endif
+    }
+  }
 
   if (this->useragent_ != nullptr) {
     config.user_agent = this->useragent_;

esphome/components/http_request/http_request_idf.h

@@ -35,6 +35,7 @@ class HttpRequestIDF : public HttpRequestComponent {
   void set_buffer_size_rx(uint16_t buffer_size_rx) { this->buffer_size_rx_ = buffer_size_rx; }
   void set_buffer_size_tx(uint16_t buffer_size_tx) { this->buffer_size_tx_ = buffer_size_tx; }
   void set_verify_ssl(bool verify_ssl) { this->verify_ssl_ = verify_ssl; }
+  void set_ca_certificate(const char *ca_certificate) { this->ca_certificate_ = ca_certificate; }
 
  protected:
   std::shared_ptr<HttpContainer> perform(const std::string &url, const std::string &method, const std::string &body,
@@ -44,6 +45,7 @@ class HttpRequestIDF : public HttpRequestComponent {
   uint16_t buffer_size_rx_{};
   uint16_t buffer_size_tx_{};
   bool verify_ssl_{true};
+  const char *ca_certificate_{nullptr};
 
   /// @brief Monitors the http client events to gather response headers
   static esp_err_t http_event_handler(esp_http_client_event_t *evt);

esphome/components/http_request/ota/ota_http_request.cpp

@@ -82,7 +82,7 @@ uint8_t OtaHttpRequestComponent::do_ota_() {
   uint32_t last_progress = 0;
   uint32_t update_start_time = millis();
   md5::MD5Digest md5_receive;
-  std::unique_ptr<char[]> md5_receive_str(new char[33]);
+  char md5_receive_str[33];
 
   if (this->md5_expected_.empty() && !this->http_get_md5_()) {
     return OTA_MD5_INVALID;
@@ -176,14 +176,14 @@ uint8_t OtaHttpRequestComponent::do_ota_() {
 
   // verify MD5 is as expected and act accordingly
   md5_receive.calculate();
-  md5_receive.get_hex(md5_receive_str.get());
-  this->md5_computed_ = md5_receive_str.get();
+  md5_receive.get_hex(md5_receive_str);
+  this->md5_computed_ = md5_receive_str;
   if (strncmp(this->md5_computed_.c_str(), this->md5_expected_.c_str(), MD5_SIZE) != 0) {
     ESP_LOGE(TAG, "MD5 computed: %s - Aborting due to MD5 mismatch", this->md5_computed_.c_str());
     this->cleanup_(std::move(backend), container);
     return ota::OTA_RESPONSE_ERROR_MD5_MISMATCH;
   } else {
-    backend->set_update_md5(md5_receive_str.get());
+    backend->set_update_md5(md5_receive_str);
   }
 
   container->end();

esphome/components/libretiny/__init__.py

@@ -191,10 +191,17 @@ def _notify_old_style(config):
 
 
 # The dev and latest branches will be at *least* this version, which is what matters.
+# Use GitHub releases directly to avoid PlatformIO moderation delays.
 ARDUINO_VERSIONS = {
-    "dev": (cv.Version(1, 9, 2), "https://github.com/libretiny-eu/libretiny.git"),
-    "latest": (cv.Version(1, 9, 2), "libretiny"),
-    "recommended": (cv.Version(1, 9, 2), None),
+    "dev": (cv.Version(1, 11, 0), "https://github.com/libretiny-eu/libretiny.git"),
+    "latest": (
+        cv.Version(1, 11, 0),
+        "https://github.com/libretiny-eu/libretiny.git#v1.11.0",
+    ),
+    "recommended": (
+        cv.Version(1, 11, 0),
+        "https://github.com/libretiny-eu/libretiny.git#v1.11.0",
+    ),
 }
 
 

esphome/components/light/addressable_light_wrapper.h

@@ -7,9 +7,7 @@ namespace esphome::light {
 
 class AddressableLightWrapper : public light::AddressableLight {
  public:
-  explicit AddressableLightWrapper(light::LightState *light_state) : light_state_(light_state) {
-    this->wrapper_state_ = new uint8_t[5];  // NOLINT(cppcoreguidelines-owning-memory)
-  }
+  explicit AddressableLightWrapper(light::LightState *light_state) : light_state_(light_state) {}
 
   int32_t size() const override { return 1; }
 
@@ -118,7 +116,7 @@ class AddressableLightWrapper : public light::AddressableLight {
   }
 
   light::LightState *light_state_;
-  uint8_t *wrapper_state_;
+  mutable uint8_t wrapper_state_[5]{};
   ColorMode color_mode_{ColorMode::UNKNOWN};
 };
 

esphome/components/mhz19/mhz19.cpp

@@ -3,8 +3,7 @@
 
 #include <cinttypes>
 
-namespace esphome {
-namespace mhz19 {
+namespace esphome::mhz19 {
 
 static const char *const TAG = "mhz19";
 static const uint8_t MHZ19_REQUEST_LENGTH = 8;
@@ -17,6 +16,19 @@ static const uint8_t MHZ19_COMMAND_DETECTION_RANGE_0_2000PPM[] = {0xFF, 0x01, 0x
 static const uint8_t MHZ19_COMMAND_DETECTION_RANGE_0_5000PPM[] = {0xFF, 0x01, 0x99, 0x00, 0x00, 0x00, 0x13, 0x88};
 static const uint8_t MHZ19_COMMAND_DETECTION_RANGE_0_10000PPM[] = {0xFF, 0x01, 0x99, 0x00, 0x00, 0x00, 0x27, 0x10};
 
+static const LogString *detection_range_to_log_string(MHZ19DetectionRange range) {
+  switch (range) {
+    case MHZ19_DETECTION_RANGE_0_2000PPM:
+      return LOG_STR("0-2000 ppm");
+    case MHZ19_DETECTION_RANGE_0_5000PPM:
+      return LOG_STR("0-5000 ppm");
+    case MHZ19_DETECTION_RANGE_0_10000PPM:
+      return LOG_STR("0-10000 ppm");
+    default:
+      return LOG_STR("default");
+  }
+}
+
 uint8_t mhz19_checksum(const uint8_t *command) {
   uint8_t sum = 0;
   for (uint8_t i = 1; i < MHZ19_REQUEST_LENGTH; i++) {
@@ -91,24 +103,24 @@ void MHZ19Component::abc_disable() {
   this->mhz19_write_command_(MHZ19_COMMAND_ABC_DISABLE, nullptr);
 }
 
-void MHZ19Component::range_set(MHZ19DetectionRange detection_ppm) {
-  switch (detection_ppm) {
-    case MHZ19_DETECTION_RANGE_DEFAULT:
-      ESP_LOGV(TAG, "Using previously set detection range (no change)");
-      break;
+void MHZ19Component::range_set(MHZ19DetectionRange detection_range) {
+  const uint8_t *command;
+  switch (detection_range) {
     case MHZ19_DETECTION_RANGE_0_2000PPM:
-      ESP_LOGD(TAG, "Setting detection range to 0 to 2000ppm");
-      this->mhz19_write_command_(MHZ19_COMMAND_DETECTION_RANGE_0_2000PPM, nullptr);
+      command = MHZ19_COMMAND_DETECTION_RANGE_0_2000PPM;
       break;
     case MHZ19_DETECTION_RANGE_0_5000PPM:
-      ESP_LOGD(TAG, "Setting detection range to 0 to 5000ppm");
-      this->mhz19_write_command_(MHZ19_COMMAND_DETECTION_RANGE_0_5000PPM, nullptr);
+      command = MHZ19_COMMAND_DETECTION_RANGE_0_5000PPM;
       break;
     case MHZ19_DETECTION_RANGE_0_10000PPM:
-      ESP_LOGD(TAG, "Setting detection range to 0 to 10000ppm");
-      this->mhz19_write_command_(MHZ19_COMMAND_DETECTION_RANGE_0_10000PPM, nullptr);
+      command = MHZ19_COMMAND_DETECTION_RANGE_0_10000PPM;
       break;
+    default:
+      ESP_LOGV(TAG, "Using previously set detection range (no change)");
+      return;
   }
+  ESP_LOGD(TAG, "Setting detection range to %s", LOG_STR_ARG(detection_range_to_log_string(detection_range)));
+  this->mhz19_write_command_(command, nullptr);
 }
 
 bool MHZ19Component::mhz19_write_command_(const uint8_t *command, uint8_t *response) {
@@ -140,24 +152,7 @@ void MHZ19Component::dump_config() {
   }
 
   ESP_LOGCONFIG(TAG, "  Warmup time: %" PRIu32 " s", this->warmup_seconds_);
-
-  const char *range_str;
-  switch (this->detection_range_) {
-    case MHZ19_DETECTION_RANGE_DEFAULT:
-      range_str = "default";
-      break;
-    case MHZ19_DETECTION_RANGE_0_2000PPM:
-      range_str = "0 to 2000ppm";
-      break;
-    case MHZ19_DETECTION_RANGE_0_5000PPM:
-      range_str = "0 to 5000ppm";
-      break;
-    case MHZ19_DETECTION_RANGE_0_10000PPM:
-      range_str = "0 to 10000ppm";
-      break;
-  }
-  ESP_LOGCONFIG(TAG, "  Detection range: %s", range_str);
+  ESP_LOGCONFIG(TAG, "  Detection range: %s", LOG_STR_ARG(detection_range_to_log_string(this->detection_range_)));
 }
 
-}  // namespace mhz19
-}  // namespace esphome
+}  // namespace esphome::mhz19

esphome/components/mhz19/mhz19.h

@@ -5,8 +5,7 @@
 #include "esphome/components/sensor/sensor.h"
 #include "esphome/components/uart/uart.h"
 
-namespace esphome {
-namespace mhz19 {
+namespace esphome::mhz19 {
 
 enum MHZ19ABCLogic {
   MHZ19_ABC_NONE = 0,
@@ -32,7 +31,7 @@ class MHZ19Component : public PollingComponent, public uart::UARTDevice {
   void calibrate_zero();
   void abc_enable();
   void abc_disable();
-  void range_set(MHZ19DetectionRange detection_ppm);
+  void range_set(MHZ19DetectionRange detection_range);
 
   void set_temperature_sensor(sensor::Sensor *temperature_sensor) { temperature_sensor_ = temperature_sensor; }
   void set_co2_sensor(sensor::Sensor *co2_sensor) { co2_sensor_ = co2_sensor; }
@@ -74,5 +73,4 @@ template<typename... Ts> class MHZ19DetectionRangeSetAction : public Action<Ts..
   void play(const Ts &...x) override { this->parent_->range_set(this->detection_range_.value(x...)); }
 };
 
-}  // namespace mhz19
-}  // namespace esphome
+}  // namespace esphome::mhz19

esphome/components/mqtt/mqtt_alarm_control_panel.cpp

@@ -1,5 +1,6 @@
 #include "mqtt_alarm_control_panel.h"
 #include "esphome/core/log.h"
+#include "esphome/core/progmem.h"
 
 #include "mqtt_const.h"
 
@@ -12,6 +13,33 @@ static const char *const TAG = "mqtt.alarm_control_panel";
 
 using namespace esphome::alarm_control_panel;
 
+static ProgmemStr alarm_state_to_mqtt_str(AlarmControlPanelState state) {
+  switch (state) {
+    case ACP_STATE_DISARMED:
+      return ESPHOME_F("disarmed");
+    case ACP_STATE_ARMED_HOME:
+      return ESPHOME_F("armed_home");
+    case ACP_STATE_ARMED_AWAY:
+      return ESPHOME_F("armed_away");
+    case ACP_STATE_ARMED_NIGHT:
+      return ESPHOME_F("armed_night");
+    case ACP_STATE_ARMED_VACATION:
+      return ESPHOME_F("armed_vacation");
+    case ACP_STATE_ARMED_CUSTOM_BYPASS:
+      return ESPHOME_F("armed_custom_bypass");
+    case ACP_STATE_PENDING:
+      return ESPHOME_F("pending");
+    case ACP_STATE_ARMING:
+      return ESPHOME_F("arming");
+    case ACP_STATE_DISARMING:
+      return ESPHOME_F("disarming");
+    case ACP_STATE_TRIGGERED:
+      return ESPHOME_F("triggered");
+    default:
+      return ESPHOME_F("unknown");
+  }
+}
+
 MQTTAlarmControlPanelComponent::MQTTAlarmControlPanelComponent(AlarmControlPanel *alarm_control_panel)
     : alarm_control_panel_(alarm_control_panel) {}
 void MQTTAlarmControlPanelComponent::setup() {
@@ -84,42 +112,9 @@ const EntityBase *MQTTAlarmControlPanelComponent::get_entity() const { return th
 
 bool MQTTAlarmControlPanelComponent::send_initial_state() { return this->publish_state(); }
 bool MQTTAlarmControlPanelComponent::publish_state() {
-  const char *state_s;
-  switch (this->alarm_control_panel_->get_state()) {
-    case ACP_STATE_DISARMED:
-      state_s = "disarmed";
-      break;
-    case ACP_STATE_ARMED_HOME:
-      state_s = "armed_home";
-      break;
-    case ACP_STATE_ARMED_AWAY:
-      state_s = "armed_away";
-      break;
-    case ACP_STATE_ARMED_NIGHT:
-      state_s = "armed_night";
-      break;
-    case ACP_STATE_ARMED_VACATION:
-      state_s = "armed_vacation";
-      break;
-    case ACP_STATE_ARMED_CUSTOM_BYPASS:
-      state_s = "armed_custom_bypass";
-      break;
-    case ACP_STATE_PENDING:
-      state_s = "pending";
-      break;
-    case ACP_STATE_ARMING:
-      state_s = "arming";
-      break;
-    case ACP_STATE_DISARMING:
-      state_s = "disarming";
-      break;
-    case ACP_STATE_TRIGGERED:
-      state_s = "triggered";
-      break;
-    default:
-      state_s = "unknown";
-  }
-  return this->publish(this->get_state_topic_(), state_s);
+  char topic_buf[MQTT_DEFAULT_TOPIC_MAX_LEN];
+  return this->publish(this->get_state_topic_to_(topic_buf),
+                       alarm_state_to_mqtt_str(this->alarm_control_panel_->get_state()));
 }
 
 }  // namespace esphome::mqtt

esphome/components/mqtt/mqtt_binary_sensor.cpp

@@ -52,8 +52,9 @@ bool MQTTBinarySensorComponent::publish_state(bool state) {
   if (this->binary_sensor_->is_status_binary_sensor())
     return true;
 
+  char topic_buf[MQTT_DEFAULT_TOPIC_MAX_LEN];
   const char *state_s = state ? "ON" : "OFF";
-  return this->publish(this->get_state_topic_(), state_s);
+  return this->publish(this->get_state_topic_to_(topic_buf), state_s);
 }
 
 }  // namespace esphome::mqtt

esphome/components/mqtt/mqtt_climate.cpp

@@ -1,5 +1,6 @@
 #include "mqtt_climate.h"
 #include "esphome/core/log.h"
+#include "esphome/core/progmem.h"
 
 #include "mqtt_const.h"
 
@@ -12,6 +13,111 @@ static const char *const TAG = "mqtt.climate";
 
 using namespace esphome::climate;
 
+static ProgmemStr climate_mode_to_mqtt_str(ClimateMode mode) {
+  switch (mode) {
+    case CLIMATE_MODE_OFF:
+      return ESPHOME_F("off");
+    case CLIMATE_MODE_HEAT_COOL:
+      return ESPHOME_F("heat_cool");
+    case CLIMATE_MODE_AUTO:
+      return ESPHOME_F("auto");
+    case CLIMATE_MODE_COOL:
+      return ESPHOME_F("cool");
+    case CLIMATE_MODE_HEAT:
+      return ESPHOME_F("heat");
+    case CLIMATE_MODE_FAN_ONLY:
+      return ESPHOME_F("fan_only");
+    case CLIMATE_MODE_DRY:
+      return ESPHOME_F("dry");
+    default:
+      return ESPHOME_F("unknown");
+  }
+}
+
+static ProgmemStr climate_action_to_mqtt_str(ClimateAction action) {
+  switch (action) {
+    case CLIMATE_ACTION_OFF:
+      return ESPHOME_F("off");
+    case CLIMATE_ACTION_COOLING:
+      return ESPHOME_F("cooling");
+    case CLIMATE_ACTION_HEATING:
+      return ESPHOME_F("heating");
+    case CLIMATE_ACTION_IDLE:
+      return ESPHOME_F("idle");
+    case CLIMATE_ACTION_DRYING:
+      return ESPHOME_F("drying");
+    case CLIMATE_ACTION_FAN:
+      return ESPHOME_F("fan");
+    default:
+      return ESPHOME_F("unknown");
+  }
+}
+
+static ProgmemStr climate_fan_mode_to_mqtt_str(ClimateFanMode fan_mode) {
+  switch (fan_mode) {
+    case CLIMATE_FAN_ON:
+      return ESPHOME_F("on");
+    case CLIMATE_FAN_OFF:
+      return ESPHOME_F("off");
+    case CLIMATE_FAN_AUTO:
+      return ESPHOME_F("auto");
+    case CLIMATE_FAN_LOW:
+      return ESPHOME_F("low");
+    case CLIMATE_FAN_MEDIUM:
+      return ESPHOME_F("medium");
+    case CLIMATE_FAN_HIGH:
+      return ESPHOME_F("high");
+    case CLIMATE_FAN_MIDDLE:
+      return ESPHOME_F("middle");
+    case CLIMATE_FAN_FOCUS:
+      return ESPHOME_F("focus");
+    case CLIMATE_FAN_DIFFUSE:
+      return ESPHOME_F("diffuse");
+    case CLIMATE_FAN_QUIET:
+      return ESPHOME_F("quiet");
+    default:
+      return ESPHOME_F("unknown");
+  }
+}
+
+static ProgmemStr climate_swing_mode_to_mqtt_str(ClimateSwingMode swing_mode) {
+  switch (swing_mode) {
+    case CLIMATE_SWING_OFF:
+      return ESPHOME_F("off");
+    case CLIMATE_SWING_BOTH:
+      return ESPHOME_F("both");
+    case CLIMATE_SWING_VERTICAL:
+      return ESPHOME_F("vertical");
+    case CLIMATE_SWING_HORIZONTAL:
+      return ESPHOME_F("horizontal");
+    default:
+      return ESPHOME_F("unknown");
+  }
+}
+
+static ProgmemStr climate_preset_to_mqtt_str(ClimatePreset preset) {
+  switch (preset) {
+    case CLIMATE_PRESET_NONE:
+      return ESPHOME_F("none");
+    case CLIMATE_PRESET_HOME:
+      return ESPHOME_F("home");
+    case CLIMATE_PRESET_ECO:
+      return ESPHOME_F("eco");
+    case CLIMATE_PRESET_AWAY:
+      return ESPHOME_F("away");
+    case CLIMATE_PRESET_BOOST:
+      return ESPHOME_F("boost");
+    case CLIMATE_PRESET_COMFORT:
+      return ESPHOME_F("comfort");
+    case CLIMATE_PRESET_SLEEP:
+      return ESPHOME_F("sleep");
+    case CLIMATE_PRESET_ACTIVITY:
+      return ESPHOME_F("activity");
+    default:
+      return ESPHOME_F("unknown");
+  }
+}
+
 void MQTTClimateComponent::send_discovery(JsonObject root, mqtt::SendDiscoveryConfig &config) {
   // NOLINTBEGIN(clang-analyzer-cplusplus.NewDeleteLeaks) false positive with ArduinoJson
   auto traits = this->device_->get_traits();
@@ -260,34 +366,8 @@ const EntityBase *MQTTClimateComponent::get_entity() const { return this->device
 bool MQTTClimateComponent::publish_state_() {
   auto traits = this->device_->get_traits();
   // mode
-  const char *mode_s;
-  switch (this->device_->mode) {
-    case CLIMATE_MODE_OFF:
-      mode_s = "off";
-      break;
-    case CLIMATE_MODE_AUTO:
-      mode_s = "auto";
-      break;
-    case CLIMATE_MODE_COOL:
-      mode_s = "cool";
-      break;
-    case CLIMATE_MODE_HEAT:
-      mode_s = "heat";
-      break;
-    case CLIMATE_MODE_FAN_ONLY:
-      mode_s = "fan_only";
-      break;
-    case CLIMATE_MODE_DRY:
-      mode_s = "dry";
-      break;
-    case CLIMATE_MODE_HEAT_COOL:
-      mode_s = "heat_cool";
-      break;
-    default:
-      mode_s = "unknown";
-  }
   bool success = true;
-  if (!this->publish(this->get_mode_state_topic(), mode_s))
+  if (!this->publish(this->get_mode_state_topic(), climate_mode_to_mqtt_str(this->device_->mode)))
     success = false;
   int8_t target_accuracy = traits.get_target_temperature_accuracy_decimals();
   int8_t current_accuracy = traits.get_current_temperature_accuracy_decimals();
@@ -327,134 +407,37 @@ bool MQTTClimateComponent::publish_state_() {
   }
 
   if (traits.get_supports_presets() || !traits.get_supported_custom_presets().empty()) {
-    std::string payload;
-    if (this->device_->preset.has_value()) {
-      switch (this->device_->preset.value()) {
-        case CLIMATE_PRESET_NONE:
-          payload = "none";
-          break;
-        case CLIMATE_PRESET_HOME:
-          payload = "home";
-          break;
-        case CLIMATE_PRESET_AWAY:
-          payload = "away";
-          break;
-        case CLIMATE_PRESET_BOOST:
-          payload = "boost";
-          break;
-        case CLIMATE_PRESET_COMFORT:
-          payload = "comfort";
-          break;
-        case CLIMATE_PRESET_ECO:
-          payload = "eco";
-          break;
-        case CLIMATE_PRESET_SLEEP:
-          payload = "sleep";
-          break;
-        case CLIMATE_PRESET_ACTIVITY:
-          payload = "activity";
-          break;
-        default:
-          payload = "unknown";
-      }
-    }
-    if (this->device_->has_custom_preset())
-      payload = this->device_->get_custom_preset().c_str();
-    if (!this->publish(this->get_preset_state_topic(), payload))
+    if (this->device_->has_custom_preset()) {
+      if (!this->publish(this->get_preset_state_topic(), this->device_->get_custom_preset()))
+        success = false;
+    } else if (this->device_->preset.has_value()) {
+      if (!this->publish(this->get_preset_state_topic(), climate_preset_to_mqtt_str(this->device_->preset.value())))
+        success = false;
+    } else if (!this->publish(this->get_preset_state_topic(), "")) {
       success = false;
+    }
   }
 
   if (traits.has_feature_flags(climate::CLIMATE_SUPPORTS_ACTION)) {
-    const char *payload;
-    switch (this->device_->action) {
-      case CLIMATE_ACTION_OFF:
-        payload = "off";
-        break;
-      case CLIMATE_ACTION_COOLING:
-        payload = "cooling";
-        break;
-      case CLIMATE_ACTION_HEATING:
-        payload = "heating";
-        break;
-      case CLIMATE_ACTION_IDLE:
-        payload = "idle";
-        break;
-      case CLIMATE_ACTION_DRYING:
-        payload = "drying";
-        break;
-      case CLIMATE_ACTION_FAN:
-        payload = "fan";
-        break;
-      default:
-        payload = "unknown";
-    }
-    if (!this->publish(this->get_action_state_topic(), payload))
+    if (!this->publish(this->get_action_state_topic(), climate_action_to_mqtt_str(this->device_->action)))
       success = false;
   }
 
   if (traits.get_supports_fan_modes()) {
-    std::string payload;
-    if (this->device_->fan_mode.has_value()) {
-      switch (this->device_->fan_mode.value()) {
-        case CLIMATE_FAN_ON:
-          payload = "on";
-          break;
-        case CLIMATE_FAN_OFF:
-          payload = "off";
-          break;
-        case CLIMATE_FAN_AUTO:
-          payload = "auto";
-          break;
-        case CLIMATE_FAN_LOW:
-          payload = "low";
-          break;
-        case CLIMATE_FAN_MEDIUM:
-          payload = "medium";
-          break;
-        case CLIMATE_FAN_HIGH:
-          payload = "high";
-          break;
-        case CLIMATE_FAN_MIDDLE:
-          payload = "middle";
-          break;
-        case CLIMATE_FAN_FOCUS:
-          payload = "focus";
-          break;
-        case CLIMATE_FAN_DIFFUSE:
-          payload = "diffuse";
-          break;
-        case CLIMATE_FAN_QUIET:
-          payload = "quiet";
-          break;
-        default:
-          payload = "unknown";
-      }
-    }
-    if (this->device_->has_custom_fan_mode())
-      payload = this->device_->get_custom_fan_mode().c_str();
-    if (!this->publish(this->get_fan_mode_state_topic(), payload))
+    if (this->device_->has_custom_fan_mode()) {
+      if (!this->publish(this->get_fan_mode_state_topic(), this->device_->get_custom_fan_mode()))
+        success = false;
+    } else if (this->device_->fan_mode.has_value()) {
+      if (!this->publish(this->get_fan_mode_state_topic(),
+                         climate_fan_mode_to_mqtt_str(this->device_->fan_mode.value())))
+        success = false;
+    } else if (!this->publish(this->get_fan_mode_state_topic(), "")) {
       success = false;
+    }
   }
 
   if (traits.get_supports_swing_modes()) {
-    const char *payload;
-    switch (this->device_->swing_mode) {
-      case CLIMATE_SWING_OFF:
-        payload = "off";
-        break;
-      case CLIMATE_SWING_BOTH:
-        payload = "both";
-        break;
-      case CLIMATE_SWING_VERTICAL:
-        payload = "vertical";
-        break;
-      case CLIMATE_SWING_HORIZONTAL:
-        payload = "horizontal";
-        break;
-      default:
-        payload = "unknown";
-    }
-    if (!this->publish(this->get_swing_mode_state_topic(), payload))
+    if (!this->publish(this->get_swing_mode_state_topic(), climate_swing_mode_to_mqtt_str(this->device_->swing_mode)))
       success = false;
   }
 

esphome/components/mqtt/mqtt_component.cpp

@@ -5,6 +5,7 @@
 #include "esphome/core/application.h"
 #include "esphome/core/helpers.h"
 #include "esphome/core/log.h"
+#include "esphome/core/progmem.h"
 #include "esphome/core/version.h"
 
 #include "mqtt_const.h"
@@ -132,17 +133,45 @@ std::string MQTTComponent::get_command_topic_() const {
 }
 
 bool MQTTComponent::publish(const std::string &topic, const std::string &payload) {
-  return this->publish(topic, payload.data(), payload.size());
+  return this->publish(topic.c_str(), payload.data(), payload.size());
 }
 
 bool MQTTComponent::publish(const std::string &topic, const char *payload, size_t payload_length) {
-  if (topic.empty())
+  return this->publish(topic.c_str(), payload, payload_length);
+}
+
+bool MQTTComponent::publish(const char *topic, const char *payload, size_t payload_length) {
+  if (topic[0] == '\0')
     return false;
   return global_mqtt_client->publish(topic, payload, payload_length, this->qos_, this->retain_);
 }
 
+bool MQTTComponent::publish(const char *topic, const char *payload) {
+  return this->publish(topic, payload, strlen(payload));
+}
+
+#ifdef USE_ESP8266
+bool MQTTComponent::publish(const std::string &topic, ProgmemStr payload) {
+  return this->publish(topic.c_str(), payload);
+}
+
+bool MQTTComponent::publish(const char *topic, ProgmemStr payload) {
+  if (topic[0] == '\0')
+    return false;
+  // On ESP8266, ProgmemStr is __FlashStringHelper* - need to copy from flash
+  char buf[64];
+  strncpy_P(buf, reinterpret_cast<const char *>(payload), sizeof(buf) - 1);
+  buf[sizeof(buf) - 1] = '\0';
+  return global_mqtt_client->publish(topic, buf, strlen(buf), this->qos_, this->retain_);
+}
+#endif
+
 bool MQTTComponent::publish_json(const std::string &topic, const json::json_build_t &f) {
-  if (topic.empty())
+  return this->publish_json(topic.c_str(), f);
+}
+
+bool MQTTComponent::publish_json(const char *topic, const json::json_build_t &f) {
+  if (topic[0] == '\0')
     return false;
   return global_mqtt_client->publish_json(topic, f, this->qos_, this->retain_);
 }

esphome/components/mqtt/mqtt_component.h

@@ -9,6 +9,7 @@
 #include "esphome/core/automation.h"
 #include "esphome/core/component.h"
 #include "esphome/core/entity_base.h"
+#include "esphome/core/progmem.h"
 #include "esphome/core/string_ref.h"
 #include "mqtt_client.h"
 
@@ -157,6 +158,70 @@ class MQTTComponent : public Component {
    */
   bool publish(const std::string &topic, const char *payload, size_t payload_length);
 
+  /** Send a MQTT message.
+   *
+   * @param topic The topic.
+   * @param payload The null-terminated payload.
+   */
+  bool publish(const std::string &topic, const char *payload) {
+    return this->publish(topic.c_str(), payload, strlen(payload));
+  }
+
+  /** Send a MQTT message (no heap allocation for topic).
+   *
+   * @param topic The topic as C string.
+   * @param payload The payload buffer.
+   * @param payload_length The length of the payload.
+   */
+  bool publish(const char *topic, const char *payload, size_t payload_length);
+
+  /** Send a MQTT message (no heap allocation for topic).
+   *
+   * @param topic The topic as StringRef (for use with get_state_topic_to_()).
+   * @param payload The payload buffer.
+   * @param payload_length The length of the payload.
+   */
+  bool publish(StringRef topic, const char *payload, size_t payload_length) {
+    return this->publish(topic.c_str(), payload, payload_length);
+  }
+
+  /** Send a MQTT message (no heap allocation for topic).
+   *
+   * @param topic The topic as C string.
+   * @param payload The null-terminated payload.
+   */
+  bool publish(const char *topic, const char *payload);
+
+  /** Send a MQTT message (no heap allocation for topic).
+   *
+   * @param topic The topic as StringRef (for use with get_state_topic_to_()).
+   * @param payload The null-terminated payload.
+   */
+  bool publish(StringRef topic, const char *payload) { return this->publish(topic.c_str(), payload); }
+
+#ifdef USE_ESP8266
+  /** Send a MQTT message with a PROGMEM string payload.
+   *
+   * @param topic The topic.
+   * @param payload The payload (ProgmemStr - stored in flash on ESP8266).
+   */
+  bool publish(const std::string &topic, ProgmemStr payload);
+
+  /** Send a MQTT message with a PROGMEM string payload (no heap allocation for topic).
+   *
+   * @param topic The topic as C string.
+   * @param payload The payload (ProgmemStr - stored in flash on ESP8266).
+   */
+  bool publish(const char *topic, ProgmemStr payload);
+
+  /** Send a MQTT message with a PROGMEM string payload (no heap allocation for topic).
+   *
+   * @param topic The topic as StringRef (for use with get_state_topic_to_()).
+   * @param payload The payload (ProgmemStr - stored in flash on ESP8266).
+   */
+  bool publish(StringRef topic, ProgmemStr payload) { return this->publish(topic.c_str(), payload); }
+#endif
+
   /** Construct and send a JSON MQTT message.
    *
    * @param topic The topic.
@@ -164,6 +229,20 @@ class MQTTComponent : public Component {
    */
   bool publish_json(const std::string &topic, const json::json_build_t &f);
 
+  /** Construct and send a JSON MQTT message (no heap allocation for topic).
+   *
+   * @param topic The topic as C string.
+   * @param f The Json Message builder.
+   */
+  bool publish_json(const char *topic, const json::json_build_t &f);
+
+  /** Construct and send a JSON MQTT message (no heap allocation for topic).
+   *
+   * @param topic The topic as StringRef (for use with get_state_topic_to_()).
+   * @param f The Json Message builder.
+   */
+  bool publish_json(StringRef topic, const json::json_build_t &f) { return this->publish_json(topic.c_str(), f); }
+
   /** Subscribe to a MQTT topic.
    *
    * @param topic The topic. Wildcards are currently not supported.

esphome/components/mqtt/mqtt_cover.cpp

@@ -1,5 +1,6 @@
 #include "mqtt_cover.h"
 #include "esphome/core/log.h"
+#include "esphome/core/progmem.h"
 
 #include "mqtt_const.h"
 
@@ -12,6 +13,20 @@ static const char *const TAG = "mqtt.cover";
 
 using namespace esphome::cover;
 
+static ProgmemStr cover_state_to_mqtt_str(CoverOperation operation, float position, bool supports_position) {
+  if (operation == COVER_OPERATION_OPENING)
+    return ESPHOME_F("opening");
+  if (operation == COVER_OPERATION_CLOSING)
+    return ESPHOME_F("closing");
+  if (position == COVER_CLOSED)
+    return ESPHOME_F("closed");
+  if (position == COVER_OPEN)
+    return ESPHOME_F("open");
+  if (supports_position)
+    return ESPHOME_F("open");
+  return ESPHOME_F("unknown");
+}
+
 MQTTCoverComponent::MQTTCoverComponent(Cover *cover) : cover_(cover) {}
 void MQTTCoverComponent::setup() {
   auto traits = this->cover_->get_traits();
@@ -109,13 +124,10 @@ bool MQTTCoverComponent::publish_state() {
     if (!this->publish(this->get_tilt_state_topic(), pos, len))
       success = false;
   }
-  const char *state_s = this->cover_->current_operation == COVER_OPERATION_OPENING   ? "opening"
-                        : this->cover_->current_operation == COVER_OPERATION_CLOSING ? "closing"
-                        : this->cover_->position == COVER_CLOSED                     ? "closed"
-                        : this->cover_->position == COVER_OPEN                       ? "open"
-                        : traits.get_supports_position()                             ? "open"
-                                                                                     : "unknown";
-  if (!this->publish(this->get_state_topic_(), state_s))
+  char topic_buf[MQTT_DEFAULT_TOPIC_MAX_LEN];
+  if (!this->publish(this->get_state_topic_to_(topic_buf),
+                     cover_state_to_mqtt_str(this->cover_->current_operation, this->cover_->position,
+                                             traits.get_supports_position())))
     success = false;
   return success;
 }

esphome/components/mqtt/mqtt_date.cpp

@@ -53,7 +53,8 @@ bool MQTTDateComponent::send_initial_state() {
   }
 }
 bool MQTTDateComponent::publish_state(uint16_t year, uint8_t month, uint8_t day) {
-  return this->publish_json(this->get_state_topic_(), [year, month, day](JsonObject root) {
+  char topic_buf[MQTT_DEFAULT_TOPIC_MAX_LEN];
+  return this->publish_json(this->get_state_topic_to_(topic_buf), [year, month, day](JsonObject root) {
     // NOLINTNEXTLINE(clang-analyzer-cplusplus.NewDeleteLeaks) false positive with ArduinoJson
     root[ESPHOME_F("year")] = year;
     root[ESPHOME_F("month")] = month;

esphome/components/mqtt/mqtt_datetime.cpp

@@ -66,15 +66,17 @@ bool MQTTDateTimeComponent::send_initial_state() {
 }
 bool MQTTDateTimeComponent::publish_state(uint16_t year, uint8_t month, uint8_t day, uint8_t hour, uint8_t minute,
                                           uint8_t second) {
-  return this->publish_json(this->get_state_topic_(), [year, month, day, hour, minute, second](JsonObject root) {
-    // NOLINTNEXTLINE(clang-analyzer-cplusplus.NewDeleteLeaks) false positive with ArduinoJson
-    root[ESPHOME_F("year")] = year;
-    root[ESPHOME_F("month")] = month;
-    root[ESPHOME_F("day")] = day;
-    root[ESPHOME_F("hour")] = hour;
-    root[ESPHOME_F("minute")] = minute;
-    root[ESPHOME_F("second")] = second;
-  });
+  char topic_buf[MQTT_DEFAULT_TOPIC_MAX_LEN];
+  return this->publish_json(this->get_state_topic_to_(topic_buf),
+                            [year, month, day, hour, minute, second](JsonObject root) {
+                              // NOLINTNEXTLINE(clang-analyzer-cplusplus.NewDeleteLeaks) false positive with ArduinoJson
+                              root[ESPHOME_F("year")] = year;
+                              root[ESPHOME_F("month")] = month;
+                              root[ESPHOME_F("day")] = day;
+                              root[ESPHOME_F("hour")] = hour;
+                              root[ESPHOME_F("minute")] = minute;
+                              root[ESPHOME_F("second")] = second;
+                            });
 }
 
 }  // namespace esphome::mqtt

esphome/components/mqtt/mqtt_event.cpp

@@ -44,7 +44,8 @@ void MQTTEventComponent::dump_config() {
 }
 
 bool MQTTEventComponent::publish_event_(const std::string &event_type) {
-  return this->publish_json(this->get_state_topic_(), [event_type](JsonObject root) {
+  char topic_buf[MQTT_DEFAULT_TOPIC_MAX_LEN];
+  return this->publish_json(this->get_state_topic_to_(topic_buf), [event_type](JsonObject root) {
     // NOLINTNEXTLINE(clang-analyzer-cplusplus.NewDeleteLeaks) false positive with ArduinoJson
     root[MQTT_EVENT_TYPE] = event_type;
   });

esphome/components/mqtt/mqtt_fan.cpp

@@ -1,5 +1,6 @@
 #include "mqtt_fan.h"
 #include "esphome/core/log.h"
+#include "esphome/core/progmem.h"
 
 #include "mqtt_const.h"
 
@@ -12,6 +13,14 @@ static const char *const TAG = "mqtt.fan";
 
 using namespace esphome::fan;
 
+static ProgmemStr fan_direction_to_mqtt_str(FanDirection direction) {
+  return direction == FanDirection::FORWARD ? ESPHOME_F("forward") : ESPHOME_F("reverse");
+}
+
+static ProgmemStr fan_oscillation_to_mqtt_str(bool oscillating) {
+  return oscillating ? ESPHOME_F("oscillate_on") : ESPHOME_F("oscillate_off");
+}
+
 MQTTFanComponent::MQTTFanComponent(Fan *state) : state_(state) {}
 
 Fan *MQTTFanComponent::get_state() const { return this->state_; }
@@ -158,18 +167,18 @@ void MQTTFanComponent::send_discovery(JsonObject root, mqtt::SendDiscoveryConfig
   }
 }
 bool MQTTFanComponent::publish_state() {
+  char topic_buf[MQTT_DEFAULT_TOPIC_MAX_LEN];
   const char *state_s = this->state_->state ? "ON" : "OFF";
   ESP_LOGD(TAG, "'%s' Sending state %s.", this->state_->get_name().c_str(), state_s);
-  this->publish(this->get_state_topic_(), state_s);
+  this->publish(this->get_state_topic_to_(topic_buf), state_s);
   bool failed = false;
   if (this->state_->get_traits().supports_direction()) {
-    bool success = this->publish(this->get_direction_state_topic(),
-                                 this->state_->direction == fan::FanDirection::FORWARD ? "forward" : "reverse");
+    bool success = this->publish(this->get_direction_state_topic(), fan_direction_to_mqtt_str(this->state_->direction));
     failed = failed || !success;
   }
   if (this->state_->get_traits().supports_oscillation()) {
-    bool success = this->publish(this->get_oscillation_state_topic(),
-                                 this->state_->oscillating ? "oscillate_on" : "oscillate_off");
+    bool success =
+        this->publish(this->get_oscillation_state_topic(), fan_oscillation_to_mqtt_str(this->state_->oscillating));
     failed = failed || !success;
   }
   auto traits = this->state_->get_traits();

esphome/components/mqtt/mqtt_light.cpp

@@ -34,7 +34,8 @@ void MQTTJSONLightComponent::on_light_remote_values_update() {
 MQTTJSONLightComponent::MQTTJSONLightComponent(LightState *state) : state_(state) {}
 
 bool MQTTJSONLightComponent::publish_state_() {
-  return this->publish_json(this->get_state_topic_(), [this](JsonObject root) {
+  char topic_buf[MQTT_DEFAULT_TOPIC_MAX_LEN];
+  return this->publish_json(this->get_state_topic_to_(topic_buf), [this](JsonObject root) {
     // NOLINTNEXTLINE(clang-analyzer-cplusplus.NewDeleteLeaks) false positive with ArduinoJson
     LightJSONSchema::dump_json(*this->state_, root);
   });

esphome/components/mqtt/mqtt_lock.cpp

@@ -47,13 +47,14 @@ void MQTTLockComponent::send_discovery(JsonObject root, mqtt::SendDiscoveryConfi
 bool MQTTLockComponent::send_initial_state() { return this->publish_state(); }
 
 bool MQTTLockComponent::publish_state() {
+  char topic_buf[MQTT_DEFAULT_TOPIC_MAX_LEN];
 #ifdef USE_STORE_LOG_STR_IN_FLASH
   char buf[LOCK_STATE_STR_SIZE];
   strncpy_P(buf, (PGM_P) lock_state_to_string(this->lock_->state), sizeof(buf) - 1);
   buf[sizeof(buf) - 1] = '\0';
-  return this->publish(this->get_state_topic_(), buf);
+  return this->publish(this->get_state_topic_to_(topic_buf), buf);
 #else
-  return this->publish(this->get_state_topic_(), LOG_STR_ARG(lock_state_to_string(this->lock_->state)));
+  return this->publish(this->get_state_topic_to_(topic_buf), LOG_STR_ARG(lock_state_to_string(this->lock_->state)));
 #endif
 }
 

esphome/components/mqtt/mqtt_number.cpp

@@ -74,9 +74,10 @@ bool MQTTNumberComponent::send_initial_state() {
   }
 }
 bool MQTTNumberComponent::publish_state(float value) {
+  char topic_buf[MQTT_DEFAULT_TOPIC_MAX_LEN];
   char buffer[64];
-  buf_append_printf(buffer, sizeof(buffer), 0, "%f", value);
-  return this->publish(this->get_state_topic_(), buffer);
+  size_t len = buf_append_printf(buffer, sizeof(buffer), 0, "%f", value);
+  return this->publish(this->get_state_topic_to_(topic_buf), buffer, len);
 }
 
 }  // namespace esphome::mqtt

esphome/components/mqtt/mqtt_select.cpp

@@ -50,7 +50,8 @@ bool MQTTSelectComponent::send_initial_state() {
   }
 }
 bool MQTTSelectComponent::publish_state(const std::string &value) {
-  return this->publish(this->get_state_topic_(), value);
+  char topic_buf[MQTT_DEFAULT_TOPIC_MAX_LEN];
+  return this->publish(this->get_state_topic_to_(topic_buf), value.data(), value.size());
 }
 
 }  // namespace esphome::mqtt

esphome/components/mqtt/mqtt_sensor.cpp

@@ -79,12 +79,13 @@ bool MQTTSensorComponent::send_initial_state() {
   }
 }
 bool MQTTSensorComponent::publish_state(float value) {
+  char topic_buf[MQTT_DEFAULT_TOPIC_MAX_LEN];
   if (mqtt::global_mqtt_client->is_publish_nan_as_none() && std::isnan(value))
-    return this->publish(this->get_state_topic_(), "None", 4);
+    return this->publish(this->get_state_topic_to_(topic_buf), "None", 4);
   int8_t accuracy = this->sensor_->get_accuracy_decimals();
   char buf[VALUE_ACCURACY_MAX_LEN];
   size_t len = value_accuracy_to_buf(buf, value, accuracy);
-  return this->publish(this->get_state_topic_(), buf, len);
+  return this->publish(this->get_state_topic_to_(topic_buf), buf, len);
 }
 
 }  // namespace esphome::mqtt

esphome/components/mqtt/mqtt_switch.cpp

@@ -52,8 +52,9 @@ void MQTTSwitchComponent::send_discovery(JsonObject root, mqtt::SendDiscoveryCon
 bool MQTTSwitchComponent::send_initial_state() { return this->publish_state(this->switch_->state); }
 
 bool MQTTSwitchComponent::publish_state(bool state) {
+  char topic_buf[MQTT_DEFAULT_TOPIC_MAX_LEN];
   const char *state_s = state ? "ON" : "OFF";
-  return this->publish(this->get_state_topic_(), state_s);
+  return this->publish(this->get_state_topic_to_(topic_buf), state_s);
 }
 
 }  // namespace esphome::mqtt

esphome/components/mqtt/mqtt_text.cpp

@@ -53,7 +53,8 @@ bool MQTTTextComponent::send_initial_state() {
   }
 }
 bool MQTTTextComponent::publish_state(const std::string &value) {
-  return this->publish(this->get_state_topic_(), value);
+  char topic_buf[MQTT_DEFAULT_TOPIC_MAX_LEN];
+  return this->publish(this->get_state_topic_to_(topic_buf), value.data(), value.size());
 }
 
 }  // namespace esphome::mqtt

esphome/components/mqtt/mqtt_text_sensor.cpp

@@ -31,7 +31,10 @@ void MQTTTextSensor::dump_config() {
   LOG_MQTT_COMPONENT(true, false);
 }
 
-bool MQTTTextSensor::publish_state(const std::string &value) { return this->publish(this->get_state_topic_(), value); }
+bool MQTTTextSensor::publish_state(const std::string &value) {
+  char topic_buf[MQTT_DEFAULT_TOPIC_MAX_LEN];
+  return this->publish(this->get_state_topic_to_(topic_buf), value.data(), value.size());
+}
 bool MQTTTextSensor::send_initial_state() {
   if (this->sensor_->has_state()) {
     return this->publish_state(this->sensor_->state);

esphome/components/mqtt/mqtt_time.cpp

@@ -53,7 +53,8 @@ bool MQTTTimeComponent::send_initial_state() {
   }
 }
 bool MQTTTimeComponent::publish_state(uint8_t hour, uint8_t minute, uint8_t second) {
-  return this->publish_json(this->get_state_topic_(), [hour, minute, second](JsonObject root) {
+  char topic_buf[MQTT_DEFAULT_TOPIC_MAX_LEN];
+  return this->publish_json(this->get_state_topic_to_(topic_buf), [hour, minute, second](JsonObject root) {
     // NOLINTNEXTLINE(clang-analyzer-cplusplus.NewDeleteLeaks) false positive with ArduinoJson
     root[ESPHOME_F("hour")] = hour;
     root[ESPHOME_F("minute")] = minute;

esphome/components/mqtt/mqtt_update.cpp

@@ -28,7 +28,8 @@ void MQTTUpdateComponent::setup() {
 }
 
 bool MQTTUpdateComponent::publish_state() {
-  return this->publish_json(this->get_state_topic_(), [this](JsonObject root) {
+  char topic_buf[MQTT_DEFAULT_TOPIC_MAX_LEN];
+  return this->publish_json(this->get_state_topic_to_(topic_buf), [this](JsonObject root) {
     root[ESPHOME_F("installed_version")] = this->update_->update_info.current_version;
     root[ESPHOME_F("latest_version")] = this->update_->update_info.latest_version;
     root[ESPHOME_F("title")] = this->update_->update_info.title;

esphome/components/mqtt/mqtt_valve.cpp

@@ -1,5 +1,6 @@
 #include "mqtt_valve.h"
 #include "esphome/core/log.h"
+#include "esphome/core/progmem.h"
 
 #include "mqtt_const.h"
 
@@ -12,6 +13,20 @@ static const char *const TAG = "mqtt.valve";
 
 using namespace esphome::valve;
 
+static ProgmemStr valve_state_to_mqtt_str(ValveOperation operation, float position, bool supports_position) {
+  if (operation == VALVE_OPERATION_OPENING)
+    return ESPHOME_F("opening");
+  if (operation == VALVE_OPERATION_CLOSING)
+    return ESPHOME_F("closing");
+  if (position == VALVE_CLOSED)
+    return ESPHOME_F("closed");
+  if (position == VALVE_OPEN)
+    return ESPHOME_F("open");
+  if (supports_position)
+    return ESPHOME_F("open");
+  return ESPHOME_F("unknown");
+}
+
 MQTTValveComponent::MQTTValveComponent(Valve *valve) : valve_(valve) {}
 void MQTTValveComponent::setup() {
   auto traits = this->valve_->get_traits();
@@ -78,13 +93,10 @@ bool MQTTValveComponent::publish_state() {
     if (!this->publish(this->get_position_state_topic(), pos, len))
       success = false;
   }
-  const char *state_s = this->valve_->current_operation == VALVE_OPERATION_OPENING   ? "opening"
-                        : this->valve_->current_operation == VALVE_OPERATION_CLOSING ? "closing"
-                        : this->valve_->position == VALVE_CLOSED                     ? "closed"
-                        : this->valve_->position == VALVE_OPEN                       ? "open"
-                        : traits.get_supports_position()                             ? "open"
-                                                                                     : "unknown";
-  if (!this->publish(this->get_state_topic_(), state_s))
+  char topic_buf[MQTT_DEFAULT_TOPIC_MAX_LEN];
+  if (!this->publish(this->get_state_topic_to_(topic_buf),
+                     valve_state_to_mqtt_str(this->valve_->current_operation, this->valve_->position,
+                                             traits.get_supports_position())))
     success = false;
   return success;
 }

esphome/components/sml/constants.h

@@ -1,5 +1,6 @@
 #pragma once
 
+#include <array>
 #include <cstdint>
 
 namespace esphome {
@@ -21,7 +22,7 @@ enum SmlMessageType : uint16_t { SML_PUBLIC_OPEN_RES = 0x0101, SML_GET_LIST_RES
 const uint16_t START_MASK = 0x55aa;  // 0x1b 1b 1b 1b 01 01 01 01
 const uint16_t END_MASK = 0x0157;    // 0x1b 1b 1b 1b 1a
 
-const std::vector<uint8_t> START_SEQ = {0x1b, 0x1b, 0x1b, 0x1b, 0x01, 0x01, 0x01, 0x01};
+constexpr std::array<uint8_t, 8> START_SEQ = {0x1b, 0x1b, 0x1b, 0x1b, 0x01, 0x01, 0x01, 0x01};
 
 }  // namespace sml
 }  // namespace esphome

esphome/components/tm1638/tm1638.cpp

@@ -35,9 +35,6 @@ void TM1638Component::setup() {
   this->set_intensity(intensity_);
 
   this->reset_();  // all LEDs off
-
-  for (uint8_t i = 0; i < 8; i++)  // zero fill print buffer
-    this->buffer_[i] = 0;
 }
 
 void TM1638Component::dump_config() {

esphome/components/tm1638/tm1638.h

@@ -70,7 +70,7 @@ class TM1638Component : public PollingComponent {
   GPIOPin *clk_pin_;
   GPIOPin *stb_pin_;
   GPIOPin *dio_pin_;
-  uint8_t *buffer_ = new uint8_t[8];
+  uint8_t buffer_[8]{};
   tm1638_writer_t writer_{};
   std::vector<KeyListener *> listeners_{};
 };

esphome/components/uln2003/uln2003.cpp

@@ -1,11 +1,23 @@
 #include "uln2003.h"
 #include "esphome/core/log.h"
 
-namespace esphome {
-namespace uln2003 {
+namespace esphome::uln2003 {
 
 static const char *const TAG = "uln2003.stepper";
 
+static const LogString *step_mode_to_log_string(ULN2003StepMode mode) {
+  switch (mode) {
+    case ULN2003_STEP_MODE_FULL_STEP:
+      return LOG_STR("FULL STEP");
+    case ULN2003_STEP_MODE_HALF_STEP:
+      return LOG_STR("HALF STEP");
+    case ULN2003_STEP_MODE_WAVE_DRIVE:
+      return LOG_STR("WAVE DRIVE");
+    default:
+      return LOG_STR("UNKNOWN");
+  }
+}
+
 void ULN2003::setup() {
   this->pin_a_->setup();
   this->pin_b_->setup();
@@ -42,22 +54,7 @@ void ULN2003::dump_config() {
   LOG_PIN("  Pin B: ", this->pin_b_);
   LOG_PIN("  Pin C: ", this->pin_c_);
   LOG_PIN("  Pin D: ", this->pin_d_);
-  const char *step_mode_s;
-  switch (this->step_mode_) {
-    case ULN2003_STEP_MODE_FULL_STEP:
-      step_mode_s = "FULL STEP";
-      break;
-    case ULN2003_STEP_MODE_HALF_STEP:
-      step_mode_s = "HALF STEP";
-      break;
-    case ULN2003_STEP_MODE_WAVE_DRIVE:
-      step_mode_s = "WAVE DRIVE";
-      break;
-    default:
-      step_mode_s = "UNKNOWN";
-      break;
-  }
-  ESP_LOGCONFIG(TAG, "  Step Mode: %s", step_mode_s);
+  ESP_LOGCONFIG(TAG, "  Step Mode: %s", LOG_STR_ARG(step_mode_to_log_string(this->step_mode_)));
 }
 void ULN2003::write_step_(int32_t step) {
   int32_t n = this->step_mode_ == ULN2003_STEP_MODE_HALF_STEP ? 8 : 4;
@@ -90,5 +87,4 @@ void ULN2003::write_step_(int32_t step) {
   this->pin_d_->digital_write((res >> 3) & 1);
 }
 
-}  // namespace uln2003
-}  // namespace esphome
+}  // namespace esphome::uln2003

esphome/components/uln2003/uln2003.h

@@ -4,8 +4,7 @@
 #include "esphome/core/hal.h"
 #include "esphome/components/stepper/stepper.h"
 
-namespace esphome {
-namespace uln2003 {
+namespace esphome::uln2003 {
 
 enum ULN2003StepMode {
   ULN2003_STEP_MODE_FULL_STEP,
@@ -40,5 +39,4 @@ class ULN2003 : public stepper::Stepper, public Component {
   int32_t current_uln_pos_{0};
 };
 
-}  // namespace uln2003
-}  // namespace esphome
+}  // namespace esphome::uln2003

esphome/components/valve/valve.cpp

@@ -2,6 +2,8 @@
 #include "esphome/core/defines.h"
 #include "esphome/core/controller_registry.h"
 #include "esphome/core/log.h"
+#include "esphome/core/progmem.h"
+
 #include <strings.h>
 
 namespace esphome {
@@ -38,13 +40,13 @@ Valve::Valve() : position{VALVE_OPEN} {}
 
 ValveCall::ValveCall(Valve *parent) : parent_(parent) {}
 ValveCall &ValveCall::set_command(const char *command) {
-  if (strcasecmp(command, "OPEN") == 0) {
+  if (ESPHOME_strcasecmp_P(command, ESPHOME_PSTR("OPEN")) == 0) {
     this->set_command_open();
-  } else if (strcasecmp(command, "CLOSE") == 0) {
+  } else if (ESPHOME_strcasecmp_P(command, ESPHOME_PSTR("CLOSE")) == 0) {
     this->set_command_close();
-  } else if (strcasecmp(command, "STOP") == 0) {
+  } else if (ESPHOME_strcasecmp_P(command, ESPHOME_PSTR("STOP")) == 0) {
     this->set_command_stop();
-  } else if (strcasecmp(command, "TOGGLE") == 0) {
+  } else if (ESPHOME_strcasecmp_P(command, ESPHOME_PSTR("TOGGLE")) == 0) {
     this->set_command_toggle();
   } else {
     ESP_LOGW(TAG, "'%s' - Unrecognized command %s", this->parent_->get_name().c_str(), command);

esphome/components/wifi/wifi_component_esp8266.cpp

@@ -698,6 +698,10 @@ bool WiFiComponent::wifi_scan_start_(bool passive) {
   if (!this->wifi_mode_(true, {}))
     return false;
 
+  // Reset scan_done_ before starting new scan to prevent stale flag from previous scan
+  // (e.g., roaming scan completed just before unexpected disconnect)
+  this->scan_done_ = false;
+
   struct scan_config config {};
   memset(&config, 0, sizeof(config));
   config.ssid = nullptr;

esphome/components/wifi/wifi_component_esp_idf.cpp

@@ -14,6 +14,7 @@
 
 #include <algorithm>
 #include <cinttypes>
+#include <memory>
 #include <utility>
 #ifdef USE_WIFI_WPA2_EAP
 #if (ESP_IDF_VERSION_MAJOR >= 5) && (ESP_IDF_VERSION_MINOR >= 1)
@@ -828,16 +829,29 @@ void WiFiComponent::wifi_process_event_(IDFWiFiEvent *data) {
 
     uint16_t number = it.number;
     scan_result_.init(number);
-
-    // Process one record at a time to avoid large buffer allocation
-    wifi_ap_record_t record;
+#ifdef USE_ESP32_HOSTED
+    // getting records one at a time fails on P4 with hosted esp32 WiFi coprocessor
+    // Presumably an upstream bug, work-around by getting all records at once
+    auto records = std::make_unique<wifi_ap_record_t[]>(number);
+    err = esp_wifi_scan_get_ap_records(&number, records.get());
+    if (err != ESP_OK) {
+      esp_wifi_clear_ap_list();
+      ESP_LOGW(TAG, "esp_wifi_scan_get_ap_records failed: %s", esp_err_to_name(err));
+      return;
+    }
     for (uint16_t i = 0; i < number; i++) {
+      wifi_ap_record_t &record = records[i];
+#else
+    // Process one record at a time to avoid large buffer allocation
+    for (uint16_t i = 0; i < number; i++) {
+      wifi_ap_record_t record;
       err = esp_wifi_scan_get_ap_record(&record);
       if (err != ESP_OK) {
         ESP_LOGW(TAG, "esp_wifi_scan_get_ap_record failed: %s", esp_err_to_name(err));
         esp_wifi_clear_ap_list();  // Free remaining records not yet retrieved
         break;
       }
+#endif  // USE_ESP32_HOSTED
       bssid_t bssid;
       std::copy(record.bssid, record.bssid + 6, bssid.begin());
       std::string ssid(reinterpret_cast<const char *>(record.ssid));

esphome/components/wifi/wifi_component_libretiny.cpp

@@ -649,6 +649,10 @@ bool WiFiComponent::wifi_scan_start_(bool passive) {
   if (!this->wifi_mode_(true, {}))
     return false;
 
+  // Reset scan_done_ before starting new scan to prevent stale flag from previous scan
+  // (e.g., roaming scan completed just before unexpected disconnect)
+  this->scan_done_ = false;
+
   // need to use WiFi because of WiFiScanClass allocations :(
   int16_t err = WiFi.scanNetworks(true, true, passive, 200);
   if (err != WIFI_SCAN_RUNNING) {

esphome/core/defines.h

@@ -42,6 +42,7 @@
 #define USE_DEVICES
 #define USE_DISPLAY
 #define USE_ENTITY_ICON
+#define USE_ESP32_HOSTED
 #define USE_ESP32_IMPROV_STATE_CALLBACK
 #define USE_EVENT
 #define USE_FAN

esphome/core/helpers.cpp

@@ -3,6 +3,7 @@
 #include "esphome/core/defines.h"
 #include "esphome/core/hal.h"
 #include "esphome/core/log.h"
+#include "esphome/core/progmem.h"
 #include "esphome/core/string_ref.h"
 
 #include <strings.h>
@@ -451,15 +452,15 @@ std::string format_bin(const uint8_t *data, size_t length) {
 }
 
 ParseOnOffState parse_on_off(const char *str, const char *on, const char *off) {
-  if (on == nullptr && strcasecmp(str, "on") == 0)
+  if (on == nullptr && ESPHOME_strcasecmp_P(str, ESPHOME_PSTR("on")) == 0)
     return PARSE_ON;
   if (on != nullptr && strcasecmp(str, on) == 0)
     return PARSE_ON;
-  if (off == nullptr && strcasecmp(str, "off") == 0)
+  if (off == nullptr && ESPHOME_strcasecmp_P(str, ESPHOME_PSTR("off")) == 0)
     return PARSE_OFF;
   if (off != nullptr && strcasecmp(str, off) == 0)
     return PARSE_OFF;
-  if (strcasecmp(str, "toggle") == 0)
+  if (ESPHOME_strcasecmp_P(str, ESPHOME_PSTR("toggle")) == 0)
     return PARSE_TOGGLE;
 
   return PARSE_NONE;

esphome/core/progmem.h

@@ -12,6 +12,10 @@
 #define ESPHOME_strncpy_P strncpy_P
 #define ESPHOME_strncat_P strncat_P
 #define ESPHOME_snprintf_P snprintf_P
+#define ESPHOME_strcmp_P strcmp_P
+#define ESPHOME_strcasecmp_P strcasecmp_P
+#define ESPHOME_strncmp_P strncmp_P
+#define ESPHOME_strncasecmp_P strncasecmp_P
 // Type for pointers to PROGMEM strings (for use with ESPHOME_F return values)
 using ProgmemStr = const __FlashStringHelper *;
 #else
@@ -21,6 +25,10 @@ using ProgmemStr = const __FlashStringHelper *;
 #define ESPHOME_strncpy_P strncpy
 #define ESPHOME_strncat_P strncat
 #define ESPHOME_snprintf_P snprintf
+#define ESPHOME_strcmp_P strcmp
+#define ESPHOME_strcasecmp_P strcasecmp
+#define ESPHOME_strncmp_P strncmp
+#define ESPHOME_strncasecmp_P strncasecmp
 // Type for pointers to strings (no PROGMEM on non-ESP8266 platforms)
 using ProgmemStr = const char *;
 #endif

esphome/espota2.py

@@ -154,6 +154,12 @@ def check_error(data: list[int] | bytes, expect: int | list[int] | None) -> None
     """
     if not expect:
         return
+    if not data:
+        raise OTAError(
+            "Error: Device closed connection without responding. "
+            "This may indicate the device ran out of memory, "
+            "a network issue, or the connection was interrupted."
+        )
     dat = data[0]
     if dat == RESPONSE_ERROR_MAGIC:
         raise OTAError("Error: Invalid magic byte")

platformio.ini

@@ -212,7 +212,7 @@ build_unflags =
 ; This are common settings for the LibreTiny (all variants) using Arduino.
 [common:libretiny-arduino]
 extends = common:arduino
-platform = libretiny@1.9.2
+platform = https://github.com/libretiny-eu/libretiny.git#v1.11.0
 framework = arduino
 lib_compat_mode = soft
 lib_deps =

pyproject.toml

@@ -1,5 +1,5 @@
 [build-system]
-requires = ["setuptools==80.10.1", "wheel>=0.43,<0.47"]
+requires = ["setuptools==80.10.2", "wheel>=0.43,<0.47"]
 build-backend = "setuptools.build_meta"
 
 [project]

requirements.txt

@@ -12,7 +12,7 @@ platformio==6.1.18  # When updating platformio, also update /docker/Dockerfile
 esptool==5.1.0
 click==8.1.7
 esphome-dashboard==20260110.0
-aioesphomeapi==43.13.0
+aioesphomeapi==43.14.0
 zeroconf==0.148.0
 puremagic==1.30
 ruamel.yaml==0.19.1 # dashboard_import

tests/components/http_request/test-custom-ca.esp32-idf.yaml

@@ -0,0 +1,7 @@
+substitutions:
+  verify_ssl: "true"
+
+http_request:
+  ca_certificate_path: $component_dir/test_ca.pem
+
+<<: !include common.yaml

tests/components/http_request/test_ca.pem

@@ -0,0 +1,10 @@
+-----BEGIN CERTIFICATE-----
+MIIBkTCB+wIJAKHBfpegPjMCMA0GCSqGSIb3DQEBCwUAMBExDzANBgNVBAMMBnVu
+dXNlZDAeFw0yNDAxMDEwMDAwMDBaFw0yNTAxMDEwMDAwMDBaMBExDzANBgNVBAMM
+BnVudXNlZDBcMA0GCSqGSIb3DQEBAQUAA0sAMEgCQQC5mMUB1hOgLmlnXtsvcGMP
+XkhAqZaR0dDPW5OS8VEopWLJCX9Y0cvNCqiDI8cnP8pP8XJGU1hGLvA5PJzWnWZz
+AgMBAAGjUzBRMB0GA1UdDgQWBBR5oQ9KqFeZOdBuAJrXxEP0dqzPtTAfBgNVHSME
+GDAWgBR5oQ9KqFeZOdBuAJrXxEP0dqzPtTAPBgNVHRMBAf8EBTADAQH/MA0GCSqG
+SIb3DQEBCwUAA0EAKqZFf6+f8FPDbKyPCpssquojgn7fEXqr/I/yz0R5CowGdMms
+H3WH3aKP4lLSHdPTBtfIoJi3gEIZjFxp3S1TWw==
+-----END CERTIFICATE-----

tests/components/text_sensor/common.yaml

@@ -64,3 +64,16 @@ text_sensor:
           - suffix -> SUFFIX
       - map:
           - PREFIX text SUFFIX -> mapped
+
+  - platform: template
+    name: "Test Lambda Filter"
+    id: test_lambda_filter
+    filters:
+      - lambda: |-
+          return {"[" + x + "]"};
+      - to_upper
+      - lambda: |-
+          if (x.length() > 10) {
+            return {x.substr(0, 10) + "..."};
+          }
+          return {x};

tests/integration/fixtures/text_sensor_raw_state.yaml

@@ -56,6 +56,36 @@ text_sensor:
       - prepend: "["
       - append: "]"
 
+  - platform: template
+    name: "To Lower Sensor"
+    id: to_lower_sensor
+    filters:
+      - to_lower
+
+  - platform: template
+    name: "Lambda Sensor"
+    id: lambda_sensor
+    filters:
+      - lambda: |-
+          return {"[" + x + "]"};
+
+  - platform: template
+    name: "Lambda Raw State Sensor"
+    id: lambda_raw_state_sensor
+    filters:
+      - lambda: |-
+          return {x + " MODIFIED"};
+
+  - platform: template
+    name: "Lambda Skip Sensor"
+    id: lambda_skip_sensor
+    filters:
+      - lambda: |-
+          if (x == "skip") {
+            return {};
+          }
+          return {x + " passed"};
+
 # Button to publish values and log raw_state vs state
 button:
   - platform: template
@@ -179,3 +209,73 @@ button:
           format: "CHAINED: state='%s'"
           args:
             - id(chained_sensor).state.c_str()
+
+  - platform: template
+    name: "Test To Lower Button"
+    id: test_to_lower_button
+    on_press:
+      - text_sensor.template.publish:
+          id: to_lower_sensor
+          state: "HELLO WORLD"
+      - delay: 50ms
+      - logger.log:
+          format: "TO_LOWER: state='%s'"
+          args:
+            - id(to_lower_sensor).state.c_str()
+
+  - platform: template
+    name: "Test Lambda Button"
+    id: test_lambda_button
+    on_press:
+      - text_sensor.template.publish:
+          id: lambda_sensor
+          state: "test"
+      - delay: 50ms
+      - logger.log:
+          format: "LAMBDA: state='%s'"
+          args:
+            - id(lambda_sensor).state.c_str()
+
+  - platform: template
+    name: "Test Lambda Pass Button"
+    id: test_lambda_pass_button
+    on_press:
+      - text_sensor.template.publish:
+          id: lambda_skip_sensor
+          state: "value"
+      - delay: 50ms
+      - logger.log:
+          format: "LAMBDA_PASS: state='%s'"
+          args:
+            - id(lambda_skip_sensor).state.c_str()
+
+  - platform: template
+    name: "Test Lambda Skip Button"
+    id: test_lambda_skip_button
+    on_press:
+      - text_sensor.template.publish:
+          id: lambda_skip_sensor
+          state: "skip"
+      - delay: 50ms
+      # When lambda returns {}, the value should NOT be published
+      # so state should remain from previous publish (or empty if first)
+      - logger.log:
+          format: "LAMBDA_SKIP: state='%s'"
+          args:
+            - id(lambda_skip_sensor).state.c_str()
+
+  - platform: template
+    name: "Test Lambda Raw State Button"
+    id: test_lambda_raw_state_button
+    on_press:
+      - text_sensor.template.publish:
+          id: lambda_raw_state_sensor
+          state: "original"
+      - delay: 50ms
+      # Verify raw_state is preserved (not mutated) after lambda filter
+      # state should be "original MODIFIED", raw_state should be "original"
+      - logger.log:
+          format: "LAMBDA_RAW_STATE: state='%s' raw_state='%s'"
+          args:
+            - id(lambda_raw_state_sensor).state.c_str()
+            - id(lambda_raw_state_sensor).get_raw_state().c_str()

tests/integration/test_text_sensor_raw_state.py

@@ -42,6 +42,11 @@ async def test_text_sensor_raw_state(
     map_off_future: asyncio.Future[str] = loop.create_future()
     map_unknown_future: asyncio.Future[str] = loop.create_future()
     chained_future: asyncio.Future[str] = loop.create_future()
+    to_lower_future: asyncio.Future[str] = loop.create_future()
+    lambda_future: asyncio.Future[str] = loop.create_future()
+    lambda_pass_future: asyncio.Future[str] = loop.create_future()
+    lambda_skip_future: asyncio.Future[str] = loop.create_future()
+    lambda_raw_state_future: asyncio.Future[tuple[str, str]] = loop.create_future()
 
     # Patterns to match log output
     # NO_FILTER: state='hello world' raw_state='hello world'
@@ -58,6 +63,13 @@ async def test_text_sensor_raw_state(
     map_off_pattern = re.compile(r"MAP_OFF: state='([^']*)'")
     map_unknown_pattern = re.compile(r"MAP_UNKNOWN: state='([^']*)'")
     chained_pattern = re.compile(r"CHAINED: state='([^']*)'")
+    to_lower_pattern = re.compile(r"TO_LOWER: state='([^']*)'")
+    lambda_pattern = re.compile(r"LAMBDA: state='([^']*)'")
+    lambda_pass_pattern = re.compile(r"LAMBDA_PASS: state='([^']*)'")
+    lambda_skip_pattern = re.compile(r"LAMBDA_SKIP: state='([^']*)'")
+    lambda_raw_state_pattern = re.compile(
+        r"LAMBDA_RAW_STATE: state='([^']*)' raw_state='([^']*)'"
+    )
 
     def check_output(line: str) -> None:
         """Check log output for expected messages."""
@@ -92,6 +104,27 @@ async def test_text_sensor_raw_state(
         if not chained_future.done() and (match := chained_pattern.search(line)):
             chained_future.set_result(match.group(1))
 
+        if not to_lower_future.done() and (match := to_lower_pattern.search(line)):
+            to_lower_future.set_result(match.group(1))
+
+        if not lambda_future.done() and (match := lambda_pattern.search(line)):
+            lambda_future.set_result(match.group(1))
+
+        if not lambda_pass_future.done() and (
+            match := lambda_pass_pattern.search(line)
+        ):
+            lambda_pass_future.set_result(match.group(1))
+
+        if not lambda_skip_future.done() and (
+            match := lambda_skip_pattern.search(line)
+        ):
+            lambda_skip_future.set_result(match.group(1))
+
+        if not lambda_raw_state_future.done() and (
+            match := lambda_raw_state_pattern.search(line)
+        ):
+            lambda_raw_state_future.set_result((match.group(1), match.group(2)))
+
     async with (
         run_compiled(yaml_config, line_callback=check_output),
         api_client_connected() as client,
@@ -272,3 +305,111 @@ async def test_text_sensor_raw_state(
             pytest.fail("Timeout waiting for CHAINED log message")
 
         assert state == "[value]", f"Chained failed: expected '[value]', got '{state}'"
+
+        # Test 10: to_lower filter
+        # "HELLO WORLD" -> "hello world"
+        to_lower_button = next(
+            (e for e in entities if "test_to_lower_button" in e.object_id.lower()),
+            None,
+        )
+        assert to_lower_button is not None, "Test To Lower Button not found"
+        client.button_command(to_lower_button.key)
+
+        try:
+            state = await asyncio.wait_for(to_lower_future, timeout=5.0)
+        except TimeoutError:
+            pytest.fail("Timeout waiting for TO_LOWER log message")
+
+        assert state == "hello world", (
+            f"to_lower failed: expected 'hello world', got '{state}'"
+        )
+
+        # Test 11: Lambda filter
+        # "test" -> "[test]"
+        lambda_button = next(
+            (e for e in entities if "test_lambda_button" in e.object_id.lower()),
+            None,
+        )
+        assert lambda_button is not None, "Test Lambda Button not found"
+        client.button_command(lambda_button.key)
+
+        try:
+            state = await asyncio.wait_for(lambda_future, timeout=5.0)
+        except TimeoutError:
+            pytest.fail("Timeout waiting for LAMBDA log message")
+
+        assert state == "[test]", f"Lambda failed: expected '[test]', got '{state}'"
+
+        # Test 12: Lambda filter - value passes through
+        # "value" -> "value passed"
+        lambda_pass_button = next(
+            (e for e in entities if "test_lambda_pass_button" in e.object_id.lower()),
+            None,
+        )
+        assert lambda_pass_button is not None, "Test Lambda Pass Button not found"
+        client.button_command(lambda_pass_button.key)
+
+        try:
+            state = await asyncio.wait_for(lambda_pass_future, timeout=5.0)
+        except TimeoutError:
+            pytest.fail("Timeout waiting for LAMBDA_PASS log message")
+
+        assert state == "value passed", (
+            f"Lambda pass failed: expected 'value passed', got '{state}'"
+        )
+
+        # Test 13: Lambda filter - skip publishing (return {})
+        # "skip" -> no publish, state remains "value passed" from previous test
+        lambda_skip_button = next(
+            (e for e in entities if "test_lambda_skip_button" in e.object_id.lower()),
+            None,
+        )
+        assert lambda_skip_button is not None, "Test Lambda Skip Button not found"
+        client.button_command(lambda_skip_button.key)
+
+        try:
+            state = await asyncio.wait_for(lambda_skip_future, timeout=5.0)
+        except TimeoutError:
+            pytest.fail("Timeout waiting for LAMBDA_SKIP log message")
+
+        # When lambda returns {}, value should NOT be published
+        # State remains from previous successful publish ("value passed")
+        assert state == "value passed", (
+            f"Lambda skip failed: expected 'value passed' (unchanged), got '{state}'"
+        )
+
+        # Test 14: Lambda filter - verify raw_state is preserved (not mutated)
+        # This is critical to verify the in-place mutation optimization is safe
+        # "original" -> state="original MODIFIED", raw_state="original"
+        lambda_raw_state_button = next(
+            (
+                e
+                for e in entities
+                if "test_lambda_raw_state_button" in e.object_id.lower()
+            ),
+            None,
+        )
+        assert lambda_raw_state_button is not None, (
+            "Test Lambda Raw State Button not found"
+        )
+        client.button_command(lambda_raw_state_button.key)
+
+        try:
+            state, raw_state = await asyncio.wait_for(
+                lambda_raw_state_future, timeout=5.0
+            )
+        except TimeoutError:
+            pytest.fail("Timeout waiting for LAMBDA_RAW_STATE log message")
+
+        assert state == "original MODIFIED", (
+            f"Lambda raw_state test failed: expected state='original MODIFIED', "
+            f"got '{state}'"
+        )
+        assert raw_state == "original", (
+            f"Lambda raw_state test failed: raw_state was mutated! "
+            f"Expected 'original', got '{raw_state}'"
+        )
+        assert state != raw_state, (
+            f"Lambda filter should modify state but preserve raw_state. "
+            f"state='{state}', raw_state='{raw_state}'"
+        )

tests/unit_tests/test_espota2.py

@@ -192,6 +192,20 @@ def test_check_error_unexpected_response() -> None:
         espota2.check_error([0x7F], [espota2.RESPONSE_OK, espota2.RESPONSE_AUTH_OK])
 
 
+def test_check_error_empty_data() -> None:
+    """Test check_error raises error when device closes connection without responding."""
+    with pytest.raises(
+        espota2.OTAError, match="Device closed connection without responding"
+    ):
+        espota2.check_error([], [espota2.RESPONSE_OK])
+
+    # Also test with empty bytes
+    with pytest.raises(
+        espota2.OTAError, match="Device closed connection without responding"
+    ):
+        espota2.check_error(b"", [espota2.RESPONSE_OK])
+
+
 def test_send_check_with_various_data_types(mock_socket: Mock) -> None:
     """Test send_check handles different data types."""