I still get so many errors in the mitemp_bt sensor just like these:
2018-05-16 15:38:15 WARNING (MainThread) [homeassistant.components.sensor] Updating mitemp_bt sensor took longer than the scheduled update interval 0:00:30
Or these:
2018-05-16 15:43:48 WARNING (Thread-13) [homeassistant.components.sensor.mitemp_bt] Polling error
Is there any solution?