Support OSRAM lights on ZHA (#11522)

homeassistant/components/light/zha.py

@@ -17,6 +17,11 @@ DEPENDENCIES = ['zha']
 
 DEFAULT_DURATION = 0.5
 
+CAPABILITIES_COLOR_XY = 0x08
+CAPABILITIES_COLOR_TEMP = 0x10
+
+UNSUPPORTED_ATTRIBUTE = 0x86
+
 
 @asyncio.coroutine
 def async_setup_platform(hass, config, async_add_devices, discovery_info=None):
@@ -32,9 +37,36 @@ def async_setup_platform(hass, config, async_add_devices, discovery_info=None):
     except (AttributeError, KeyError):
         pass
 
+    if discovery_info.get('color_capabilities') is None:
+        # ZCL Version 4 devices don't support the color_capabilities attribute.
+        # In this version XY support is mandatory, but we need to probe to
+        # determine if the device supports color temperature.
+        discovery_info['color_capabilities'] = CAPABILITIES_COLOR_XY
+        result = yield from safe_read(
+            endpoint.light_color, ['color_temperature'])
+        if result.get('color_temperature') is not UNSUPPORTED_ATTRIBUTE:
+            discovery_info['color_capabilities'] |= CAPABILITIES_COLOR_TEMP
+
     async_add_devices([Light(**discovery_info)], update_before_add=True)
 
 
+@asyncio.coroutine
+def safe_read(cluster, attributes):
+    """Swallow all exceptions from network read.
+
+    If we throw during initialization, setup fails. Rather have an
+    entity that exists, but is in a maybe wrong state, than no entity.
+    """
+    try:
+        result, _ = yield from cluster.read_attributes(
+            attributes,
+            allow_cache=False,
+        )
+        return result
+    except Exception:  # pylint: disable=broad-except
+        return {}
+
+
 class Light(zha.Entity, light.Light):
     """Representation of a ZHA or ZLL light."""
 
@@ -54,11 +86,11 @@ class Light(zha.Entity, light.Light):
             self._supported_features |= light.SUPPORT_TRANSITION
             self._brightness = 0
         if zcl_clusters.lighting.Color.cluster_id in self._in_clusters:
-            color_capabilities = kwargs.get('color_capabilities', 0x10)
-            if color_capabilities & 0x10:
+            color_capabilities = kwargs['color_capabilities']
+            if color_capabilities & CAPABILITIES_COLOR_TEMP:
                 self._supported_features |= light.SUPPORT_COLOR_TEMP
 
-            if color_capabilities & 0x08:
+            if color_capabilities & CAPABILITIES_COLOR_XY:
                 self._supported_features |= light.SUPPORT_XY_COLOR
                 self._supported_features |= light.SUPPORT_RGB_COLOR
                 self._xy_color = (1.0, 1.0)
@@ -142,24 +174,6 @@ class Light(zha.Entity, light.Light):
     @asyncio.coroutine
     def async_update(self):
         """Retrieve latest state."""
-        _LOGGER.debug("%s async_update", self.entity_id)
-
-        @asyncio.coroutine
-        def safe_read(cluster, attributes):
-            """Swallow all exceptions from network read.
-
-            If we throw during initialization, setup fails. Rather have an
-            entity that exists, but is in a maybe wrong state, than no entity.
-            """
-            try:
-                result, _ = yield from cluster.read_attributes(
-                    attributes,
-                    allow_cache=False,
-                )
-                return result
-            except Exception:  # pylint: disable=broad-except
-                return {}
-
         result = yield from safe_read(self._endpoint.on_off, ['on_off'])
         self._state = result.get('on_off', self._state)