I have been working on a version 2 of this system that uses a low cost esp8266 wifi module -

http://kayakpete.tumblr.com/post/110860425884/garage-door-controller-with-esp8266-running

You can see the garage door sensor simulated as a push button in this picture. The board to the left is a USB to TTL serial converter used to program the ESP-01 esp8266 module. The relay is above, and a power supply on the right.

I am running NodeMCU on the ESP01, but it is crashy.