Comment on RF Hacking A Ceiling Fan Via The Remote by Gus Mueller
I used to have a ceiling fan that ultimately wriggled back and forth enough to cause metal fatigue to its bolts, sending it crashing to the floor one day while I was in Costa Rica (the house sitter told me!). That one was simple and controlled by an ordinary electric switch. The replacement I bought (and you can never know in detail what their quirks are until you buy them) had an electronic RF controller that -- infuriatingly in this environment -- forgot its state after a power outage. So I could no longer use the system I'd been using with the old fan, which was a mercury tilt switch that caused it to turn on when the temperature rose above about 90 degrees. This was perfect in the winter time for sending the hot air from the woodstove down out of the cathedral ceiling.