Trim CW from RGB when not supported in ozw (home-assistant#39191)

* Trim the CW value if CW isn't supported

* Trim CW from white level as well

homeassistant/components/ozw/light.py

@@ -204,12 +204,17 @@ async def async_turn_on(self, **kwargs):
             rgbw = "#"
             for colorval in color_util.color_hs_to_RGB(*hs_color):
                 rgbw += f"{colorval:02x}"
-            rgbw += "0000"
+            if self._color_channels and self._color_channels & COLOR_CHANNEL_COLD_WHITE:
+                rgbw += "0000"
+            else:
+                # trim the CW value or it will not work correctly
+                rgbw += "00"
             # white LED must be off in order for color to work
 
         elif white is not None:
             if self._color_channels & COLOR_CHANNEL_WARM_WHITE:
-                rgbw = f"#000000{white:02x}00"
+                # trim the CW value or it will not work correctly
+                rgbw = f"#000000{white:02x}"
             else:
                 rgbw = f"#00000000{white:02x}"
 

tests/components/ozw/test_light.py

@@ -377,11 +377,11 @@ async def test_pure_rgb_dimmer_light(
 
     msg = sent_messages[-2]
     assert msg["topic"] == "OpenZWave/1/command/setvalue/"
-    assert msg["payload"] == {"Value": "#ff4cff0000", "ValueIDKey": 122470423}
+    assert msg["payload"] == {"Value": "#ff4cff00", "ValueIDKey": 122470423}
 
     # Feedback on state
     light_pure_rgb_msg.decode()
-    light_pure_rgb_msg.payload["Value"] = "#ff4cff0000"
+    light_pure_rgb_msg.payload["Value"] = "#ff4cff00"
     light_pure_rgb_msg.encode()
     receive_message(light_pure_rgb_msg)
     await hass.async_block_till_done()
@@ -500,14 +500,14 @@ async def test_no_cw_light(
     assert len(sent_messages) == 2
     msg = sent_messages[-2]
     assert msg["topic"] == "OpenZWave/1/command/setvalue/"
-    assert msg["payload"] == {"Value": "#000000be00", "ValueIDKey": 659341335}
+    assert msg["payload"] == {"Value": "#000000be", "ValueIDKey": 659341335}
 
     # Feedback on state
     light_msg.decode()
     light_msg.payload["Value"] = byte_to_zwave_brightness(255)
     light_msg.encode()
     light_rgb_msg.decode()
-    light_rgb_msg.payload["Value"] = "#000000be00"
+    light_rgb_msg.payload["Value"] = "#000000be"
     light_rgb_msg.encode()
     receive_message(light_msg)
     receive_message(light_rgb_msg)