switch to more specific exception

Author: Lash-L

roborock/devices/local_channel.py

@@ -157,7 +157,7 @@ async def connect(self) -> None:
         # Perform protocol negotiation
         try:
             await self._hello()
-        except Exception:
+        except RoborockException:
             # If protocol negotiation fails, clean up the connection state
             self.close()
             raise