I have a pi3 setup as a garage door opener. It's wired to two, 4 channel relays (only use two relays), one for each garage door. A simple php page that can be a

I have a pi3 setup as a garage door opener. It's wired to two, 4 channel relays (only use two relays), one for each garage door. A simple php page that can be accessed and a big icon 'lressed', triggers the gpio to switch the relay. This opens or closes the door. I set this up because I got tired of replacing batteries in a garage door opener. This way,I just open the web page on my phone and open the door. I also setup a few android Tasker jobs to register when my phone connects to home wifi, and is also connected to my vehicle Bluetooth. When that registers, it automatically opens the garage door.