DIY In-Wall Sonoff Light Switch

This is an old version. Please see version 2 of the in-wall sonoff light switch. Version 2 doesn't require the additional pcb and button. You can find it here: https://www.thingiverse.com/thing:2632463

After printing, you will need to insert the Actuator through the back of the Mount Plate and **carefully** force the tabs of the Actuator into the holes on the Mount Plate. Once you have the Actuator installed, it will be a little stiff and hard to move, but just work it back a forth a few times and it will soon operate smoothly.

You will also need to make up the PCB that holds the pull-up resistors and buttons which the actuator presses. I just used some perf-board and salvaged buttons and resistors to make it. The PCB should be shaped as in the image above because the sonoff's button and LED are rather tall and I wanted to make sure that the whole switch enclosure would fit inside the wall with the existing wires tucked behind it.

Below is my video describing my Sonoff In-W