I just managed to fry my garage door opener. Got the garhage project up and running and then connected it to the terminals on the wall switch (I have a Genie Max opener). The relay worked fine in response to commands from HA, but the garage door wasn’t opening, so I manually shorted the terminals on the wall switch to see if that would trigger the door, and the Genie went dead. There is a little circuit board inside the wall switch doorbell thing that I guess is sending an encoded signal which I bypassed, thus causing some damage somewhere. Have a service call in to see about repairing the damage; I hope it’s just an internal fuse or something, but my little 25$ project just turned into a $125+ repair. Oh well.