I wanted to be able to control my garage door over WiFi and the Internet, and I wanted to make it a DIY project. Everyone always says to use Raspberry Pi devices to accomplish this task, but I decided to use a GL-Inet MT300N router:
So how this works, basically the MT300N controls a relay over GPIO port 44. I wrote a simple bash script to turn the relay on, then immediately off (to simulate someone pressing the button of the garage door opener). Full technical details and my code can be found here: https://www.justingoetz.net/posts/openwrt-garage-door-controller
And here is a demo video, if you were interested: