Check if station is available and valid

Author: fabaff

luftdaten/__init__.py

@@ -23,7 +23,6 @@ def __init__(self, sensor_id, loop, session):
         self._loop = loop
         self._session = session
         self.sensor_id = sensor_id
-        self.data = None
         self.values = {
                 'humidity': None,
                 'P1': None,
@@ -49,6 +48,10 @@ async def get_data(self):
             _LOGGER.error("Can not load data from luftdaten.info")
             raise exceptions.LuftdatenConnectionError()
 
+        if not data:
+            self.values = self.meta = None
+            return
+
         try:
             sensor_data = sorted(
                 data, key=lambda timestamp: timestamp['timestamp'],