Fix upnp raw sensor state formatting when None (#30444)

home-assistant · Jan 10, 2020 · c7e300e · c7e300e
1 parent 5d850c5
commit c7e300e
Showing 1 changed file with 3 additions and 0 deletions.
diff --git a/homeassistant/components/upnp/sensor.py b/homeassistant/components/upnp/sensor.py
@@ -126,6 +126,9 @@ def unique_id(self) -> str:
     @property
     def state(self) -> str:
         """Return the state of the device."""
+        if self._state is None:
+            return None
+
         return format(self._state, "d")
 
     @property