Bathroom fan "on" with humidty changes from current level

[NHENRY]

An alternative would be to install this smartapp in the IDE. I have been using this for a long while now and has worked great!

[OBSOLETE] Smart Bathroom Fan

Smart Bathroom Fan Bathroom fan automation can be tricky. If your house is anything like mine, it’s not exactly air tight. Seasonal changes in humidity can make it difficult to set specific relative humidity percentages at which to turn your bathroom exhaust fan on or off. This SmartApp attempts to put some intelligence into the process by sampling the humidity in the room every five minutes and maintaining a rolling 24-hour average humidity. Your thresholds are then specified based on this average. Features This SmartApp does the following: Turns on the fan when the humidity is more than X percent greater than the 24-hour average. Turns off the fan when the humidity falls to within Y percent of the 24-hour average OR after an optional (but recommended) specified maximum amount …