Hi. I’m trying to automate my attic fan to turn on if the outdoor humidity is 5% lower than my attic humidity. I probably want to do the same with temperature. Once the humidity or temperatures indoor and outdoor are close (within 1%?) then I want to turn off the fan. It seems like the theory behind attic fans is to pull in the outside air into the attic so I only want to do this when the outdoor humidity or temperature are lower than in the attic.
In the stock Smartthings automation manager, I can set a rule against the outdoor humidity (or temperature) and another rule against the sensor in my attic, but I haven’t found a way to compare the two.
Thanks for any help!