Ensure temperature control stops on deactivate (#572)

Author: rickwierenga

pylabrobot/heating_shaking/heater_shaker.py

@@ -32,3 +32,7 @@ def __init__(
       model=model,
     )
     self.backend: HeaterShakerBackend = backend  # fix type
+
+  async def stop(self):
+    await TemperatureController.stop(self)
+    await Shaker.stop(self)

pylabrobot/temperature_controlling/temperature_controller.py

@@ -102,6 +102,11 @@ async def deactivate(self):
     self.target_temperature = None
     return await self.backend.deactivate()
 
+  async def stop(self):
+    """Stop the temperature controller and close the backend connection."""
+    await self.deactivate()
+    await super().stop()
+
   def serialize(self) -> dict:
     return {
       **Machine.serialize(self),