Residential automation are becoming more frequent on people life, and that’s what Tyler Bletsh did. He started working on a new office and the “smart” air conditioner, wasn´t “smart” enough to turn itself off during night.
Instead, there is a physical wall switch plate that is use to turn off the air conditioner manually, “like a barbarian”, according to Tyler. Avoiding being a barbarian, Bletsh make a robot using a servo that turn off the switch automatically and it is control by an Arduino Nano.
more information here