deCONZ - Don't send off signals to light if already off (#36357)

homeassistant/components/deconz/light.py

@@ -186,6 +186,9 @@ class DeconzLight(DeconzDevice, LightEntity):
 
     async def async_turn_off(self, **kwargs):
         """Turn off light."""
+        if not self._device.state:
+            return
+
         data = {"on": False}
 
         if ATTR_TRANSITION in kwargs:

tests/components/deconz/test_light.py

@@ -189,6 +189,26 @@ async def test_lights_and_groups(hass):
             json={"xy": (0.411, 0.351), "alert": "lselect", "effect": "none"},
         )
 
+    with patch.object(rgb_light_device, "_request", return_value=True) as set_callback:
+        await hass.services.async_call(
+            light.DOMAIN,
+            light.SERVICE_TURN_OFF,
+            {"entity_id": "light.rgb_light", "transition": 5, "flash": "short"},
+            blocking=True,
+        )
+        await hass.async_block_till_done()
+        assert not set_callback.called
+
+    state_changed_event = {
+        "t": "event",
+        "e": "changed",
+        "r": "lights",
+        "id": "1",
+        "state": {"on": True},
+    }
+    gateway.api.event_handler(state_changed_event)
+    await hass.async_block_till_done()
+
     with patch.object(rgb_light_device, "_request", return_value=True) as set_callback:
         await hass.services.async_call(
             light.DOMAIN,