Correct

Author: bouwew

plugwise/smile.py

@@ -547,9 +547,9 @@ async def _set_preset_legacy(self, preset: str) -> None:
 
     async def set_preset(self, loc_id: str, preset: str) -> None:
         """Set the given Preset on the relevant Thermostat - from LOCATIONS."""
-        if presets := self._presets(loc_id) is None:
+        if (presets := self._presets(loc_id)) is None:
             raise PlugwiseError("Plugwise: no presets available.")
-        if preset not in presets:
+        if preset not in list(presets):
             raise PlugwiseError("Plugwise: invalid preset.")
 
         if self._smile_legacy: