Re-map light brightness range

Home Assistant uses brightness range 0-255 whilst Tuya somewhere around
29-1092. This commit maps brightness between these two ranges.

custom_components/localtuya/const.py

@@ -8,6 +8,10 @@ CONF_LOCAL_KEY = "local_key"
 CONF_PROTOCOL_VERSION = "protocol_version"
 CONF_DPS_STRINGS = "dps_strings"
 
+# light
+CONF_BRIGHTNESS_LOWER = "brightness_lower"
+CONF_BRIGHTNESS_UPPER = "brightness_upper"
+
 # switch
 CONF_CURRENT = "current"
 CONF_CURRENT_CONSUMPTION = "current_consumption"

custom_components/localtuya/light.py

@@ -19,18 +19,36 @@ from homeassistant.components.light import (
 )
 
 from .common import LocalTuyaEntity, async_setup_entry
+from .const import CONF_BRIGHTNESS_LOWER, CONF_BRIGHTNESS_UPPER
 
 _LOGGER = logging.getLogger(__name__)
 
 MIN_MIRED = 153
 MAX_MIRED = 370
 
+DEFAULT_LOWER_BRIGHTNESS = 29
+DEFAULT_UPPER_BRIGHTNESS = 1000
+
+
+def map_range(value, from_lower, from_upper, to_lower, to_upper):
+    """Map a value in one range to another."""
+    mapped = (value - from_lower) * (to_upper - to_lower) / (
+        from_upper - from_lower
+    ) + to_lower
+    return int(min(max(mapped, to_lower), to_upper))
+
 
 def flow_schema(dps):
     """Return schema used in config flow."""
     return {
         vol.Optional(CONF_BRIGHTNESS): vol.In(dps),
         vol.Optional(CONF_COLOR_TEMP): vol.In(dps),
+        vol.Optional(CONF_BRIGHTNESS_LOWER, default=DEFAULT_LOWER_BRIGHTNESS): vol.All(
+            vol.Coerce(int), vol.Range(min=0, max=10000)
+        ),
+        vol.Optional(CONF_BRIGHTNESS_UPPER, default=DEFAULT_UPPER_BRIGHTNESS): vol.All(
+            vol.Coerce(int), vol.Range(min=0, max=10000)
+        ),
     }
 
 
@@ -47,8 +65,14 @@ class LocaltuyaLight(LocalTuyaEntity, LightEntity):
         """Initialize the Tuya light."""
         super().__init__(device, config_entry, lightid, **kwargs)
         self._state = False
-        self._brightness = 127
-        self._color_temp = 127
+        self._brightness = None
+        self._color_temp = None
+        self._lower_brightness = self._config.get(
+            CONF_BRIGHTNESS_LOWER, DEFAULT_LOWER_BRIGHTNESS
+        )
+        self._upper_brightness = self._config.get(
+            CONF_BRIGHTNESS_UPPER, DEFAULT_UPPER_BRIGHTNESS
+        )
 
     @property
     def is_on(self):
@@ -63,10 +87,8 @@ class LocaltuyaLight(LocalTuyaEntity, LightEntity):
     @property
     def color_temp(self):
         """Return the color_temp of the light."""
-        try:
+        if self.has_config(CONF_COLOR_TEMP):
             return int(MAX_MIRED - (((MAX_MIRED - MIN_MIRED) / 255) * self._color_temp))
-        except TypeError:
-            pass
 
     @property
     def min_mireds(self):
@@ -81,24 +103,32 @@ class LocaltuyaLight(LocalTuyaEntity, LightEntity):
     @property
     def supported_features(self):
         """Flag supported features."""
-        supports = SUPPORT_BRIGHTNESS
-        if self._color_temp is not None:
-            supports = supports | SUPPORT_COLOR_TEMP
+        supports = 0
+        if self.has_config(CONF_BRIGHTNESS):
+            supports |= SUPPORT_BRIGHTNESS
+        if self.has_config(CONF_COLOR_TEMP):
+            supports |= SUPPORT_COLOR_TEMP
         return supports
 
     async def async_turn_on(self, **kwargs):
         """Turn on or control the light."""
-        await self._device.set_dp(True, self._dp_id)
+        self._device.set_dp(True, self._dp_id)
+        features = self.supported_features
 
-        if ATTR_BRIGHTNESS in kwargs:
-            await self._device.set_dp(
-                max(int(kwargs[ATTR_BRIGHTNESS]), 25), self._config.get(CONF_BRIGHTNESS)
+        if ATTR_BRIGHTNESS in kwargs and (features & SUPPORT_BRIGHTNESS):
+            brightness = map_range(
+                int(kwargs[ATTR_BRIGHTNESS]),
+                0,
+                255,
+                self._lower_brightness,
+                self._upper_brightness,
             )
+            self._device.set_dp(brightness, self._config.get(CONF_BRIGHTNESS))
 
         if ATTR_HS_COLOR in kwargs:
             raise ValueError(" TODO implement RGB from HS")
 
-        if ATTR_COLOR_TEMP in kwargs:
+        if ATTR_COLOR_TEMP in kwargs and (features & SUPPORT_COLOR_TEMP):
             color_temp = int(
                 255
                 - (255 / (MAX_MIRED - MIN_MIRED))
@@ -113,14 +143,22 @@ class LocaltuyaLight(LocalTuyaEntity, LightEntity):
     def status_updated(self):
         """Device status was updated."""
         self._state = self.dps(self._dp_id)
+        supported = self.supported_features
 
-        brightness = self.dps_conf(CONF_BRIGHTNESS)
-        if brightness is not None:
-            brightness = min(brightness, 255)
-            brightness = max(brightness, 25)
-        self._brightness = brightness
+        if supported & SUPPORT_BRIGHTNESS:
+            brightness = self.dps_conf(CONF_BRIGHTNESS)
+            if brightness is not None:
+                brightness = map_range(
+                    brightness,
+                    self._lower_brightness,
+                    self._upper_brightness,
+                    0,
+                    255,
+                )
+            self._brightness = brightness
 
-        self._color_temp = self.dps_conf(CONF_COLOR_TEMP)
+        if supported & SUPPORT_COLOR_TEMP:
+            self._color_temp = self.dps_conf(CONF_COLOR_TEMP)
 
 
 async_setup_entry = partial(async_setup_entry, DOMAIN, LocaltuyaLight, flow_schema)

custom_components/localtuya/translations/en.json

@@ -57,6 +57,8 @@
                     "state_on": "On Value",
                     "state_off": "Off Value",
                     "brightness": "Brightness",
+                    "brightness_lower": "Brightness Lower Value",
+                    "brightness_upper": "Brightness Upper Value",
                     "color_temp": "Color Temperature"
                 }
             }
@@ -94,6 +96,8 @@
                     "state_on": "On Value",
                     "state_off": "Off Value",
                     "brightness": "Brightness",
+                    "brightness_lower": "Brightness Lower Value",
+                    "brightness_upper": "Brightness Upper Value",
                     "color_temp": "Color Temperature"
                 }
             },