I think the fan only runs when it is taking readings but I can’t really check as my sensors are quite high up a wall.
And Brian - I would like to use the luftdaten temperature and humidity but the wmr300 produces the indoor values so I guess I need the override. Looking at airquality2.txt the values for TH are there with the sensor described as BME280 as attached.
Best wishes
for 2019
Alan
airquality2.txt (469 Bytes)