diff --git a/builder/uf2.py b/builder/uf2.py
index 21cfc4c..4342fa5 100644
--- a/builder/uf2.py
+++ b/builder/uf2.py
@@ -14,10 +14,14 @@ def env_uf2ota(env, *args, **kwargs):
     now = datetime.now()
     project_dir = env.subst("$PROJECT_DIR")
     project_name = basename(normpath(project_dir))
-    # TODO support specifying custom version
     project_version = now.strftime("%y.%m.%d")
     lt_version = platform.version
 
+    if platform.custom("fw_name"):
+        project_name = platform.custom("fw_name")
+    if platform.custom("fw_version"):
+        project_version = platform.custom("fw_version")
+
     inputs = " ".join(f'"{";".join(input)}"' for input in env["UF2OTA"])
     output = [
         project_name,
diff --git a/docs/config.md b/docs/config.md
index 5eb0799..1a80bcb 100644
--- a/docs/config.md
+++ b/docs/config.md
@@ -1,4 +1,18 @@
-# LibreTuya API Configuration
+# Configuration
+
+## Project options
+
+```ini
+[env:my_board]
+# custom firmware name, present in UF2 output files
+# - default: project directory name
+custom_fw_name = my_firmware
+# custom firmware version
+# - default: current date in yy.mm.dd format
+custom_fw_version = 1.2.0
+```
+
+## LibreTuya API
 
 Note: see [LibreTuyaConfig.h](../arduino/libretuya/core/LibreTuyaConfig.h) for most options and their defaults.
 
@@ -9,7 +23,7 @@ build_flags =
   -D LT_LOGLEVEL=LT_LEVEL_DEBUG
 ```
 
-## Logging
+### Logging
 
 - LT_LOGGER - enable/disable LibreTuya logger globally. Enabled by default.
 - LT_LOGLEVEL - global LT loglevel:
@@ -25,7 +39,7 @@ build_flags =
 - LT_LOGGER_COLOR - output ANSI terminal colors
 - LT_PRINTF_BROKEN - whether printf outputs "0." for floats with value 0
 
-## Debug logging
+### Debug logging
 
 The following options enable library-specific debugging messages. They are only effective if `LT_LOGLEVEL` is set below INFO. All of them are disabled by default.
 
@@ -37,7 +51,7 @@ Families should generally call i.e. WiFiClient debugging for client-related code
 - LT_DEBUG_WIFI_STA - `WiFiSTA.cpp`
 - LT_DEBUG_WIFI_AP - `WiFiAP.cpp`
 
-## Family options
+### Family options
 
 - LT_HAS_LWIP - whether family SDK has LwIP. This causes `LwIPRxBuffer.cpp` to be compiled for family libraries to use.
 - LT_HAS_LWIP2 - whether family has LwIP v2.0.0 or newer. This causes `LwIPmDNS.cpp` to be compiled.
diff --git a/platform.py b/platform.py
index 452fa48..c1fc62b 100644
--- a/platform.py
+++ b/platform.py
@@ -77,6 +77,7 @@ def find_pkg_root(self, path: str, spec: PackageSpec):
 
 class LibretuyaPlatform(PlatformBase):
     boards_base: Dict[str, dict] = {}
+    custom_opts: Dict[str, object] = {}
 
     def configure_default_packages(self, options, targets):
         framework = options.get("pioframework")[0]
@@ -141,8 +142,18 @@ class LibretuyaPlatform(PlatformBase):
         global libretuya_packages
         libretuya_packages = self.packages
 
+        # save custom options from env
+        self.custom_opts = {}
+        for key, value in options.items():
+            if not key.startswith("custom_"):
+                continue
+            self.custom_opts[key[7:]] = value
+
         return super().configure_default_packages(options, targets)
 
+    def custom(self, key: str) -> object:
+        return self.custom_opts.get(key, None)
+
     def get_boards(self, id_=None):
         result = PlatformBase.get_boards(self, id_)
         if not result: