Average two sensors

[Cobra]

Also have a look at ‘super smart fan’
This compares humidity levels and controls a fan based upon the comparison

Bathroom Humidity

OK guys.. Here is the first draft of the 'Super Smart Fan' If configured correctly it should: Turn on the fan when it's too humid (turning off when humidity returns to a normal level - based on a baseline sensor) Turn on with motion. - Turn off automatically after a pre set time period when motion stops (if humidity is normal) Turn off automatically after a pre set time period when manually switched on (if humidity is normal) You can find the app here: Have a thrash about…

Andy