Fix bug missing initialization.

Fix bug with mac entered, always use lowercase mac to connect, so entered mac case does not matter.
Fix bug changed entity, force to use uppercase mac for unique id.

Author: sverrham

custom_components/airthings_wave/airthings.py

@@ -146,6 +146,7 @@ def __init__(self, scan_interval, mac=None):
         self.sensordata = {}
         self.scan_interval = scan_interval
         self.last_scan = -1
+        self._dev = None
 
     def _parse_serial_number(self, manufacturer_data):
         try:
@@ -177,7 +178,7 @@ def connect(self, mac, retries=10):
         while (tries < retries):
             tries += 1
             try:
-                self._dev = btle.Peripheral(mac)
+                self._dev = btle.Peripheral(mac.lower())
             except Exception as e:
                 print(e)
                 if tries == retries:

custom_components/airthings_wave/sensor.py

@@ -214,7 +214,7 @@ def __init__(self, mac, name, device, device_info, sensor_specifics):
         """Initialize a sensor."""
         self.device = device
         self._mac = mac
-        self._name = '{}-{}'.format(mac, name)
+        self._name = '{}-{}'.format(mac.upper(), name)
         _LOGGER.debug("Added sensor entity {}".format(self._name))
         self._sensor_name = name