FIX: callback function change to async

ml/thing.py

@@ -132,7 +132,7 @@ def _add_on_channel_open_callback(_thing, _callback, _one_shot, *_args, **_kwarg
         )
 
     def add_ml40_implementation(self, implementation_object, ml40_feature, *args, **kwargs):
-        def _add_ml40_implementation(_thing, _implementation_object, _ml40_feature, *_args, **_kwargs):
+        async def _add_ml40_implementation(_thing, _implementation_object, _ml40_feature, *_args, **_kwargs):
             feature = _thing.entry.features.get(_ml40_feature, None)
             if feature is None:
                 APP_LOGGER.critical(
@@ -212,8 +212,9 @@ def __get_remaining_time_to_refresh(self):
     def __setup_thing_json_sync(self):
         APP_LOGGER.info("[S3I]: Start the thing")
         self.__recursively_update_dt_json(frequency=self.parameters.thing_sync_freq)
-        self.callbacks.process(
-            prefix=self._ON_THING_START_OK
+        self.callbacks.process_async_task(
+            prefix=self._ON_THING_START_OK,
+            loop=self.loop
         )
 
     def __setup_directory(self):