Socket Cover for Moes/Tuya switches

As I added more and more zigbee controlled lights and things, I was thinking about changing all the switches in the house for smart switches from Niko. Unfortunately, these are quite expensive, so I was searching for a cheaper alternative.

On Amazon, I found these MOES scene switches, that are available in 1, 2, 3 and 4 switch variants. I bought a few of those, and they work nicely. The nicest one is the 4-gang switch, as it is a bit quieter than the others. (the others are quite clicky...). And, they are fairly cheap, around 20-22 euro's each. 

Unfortunately, it is not easy to replace these in the place of the actual switches, as they are intended to either screwed or glued to the wall. As I wanted to keep the original switch, I took of the rocker of the switch (which just left the prongs there) and designed a cover to go over it, where you then can attach the scene switch onto.

This is made for euro-style square switches (usually found in a bit older houses - mine is from the late 1980's) that are 80-81mm in width and height. They also need to have a bit of a depth to them, as that is how the cover attaches to the switch itself. Mine were 5.8 mm thick, so keep that in mind.

Extra tools needed: 

• 2 x M3x6mm screw and nut. This is to screw the Moes/tuya switch to the cover. It also works with an M4 screw of 6mm, without needed a nut.

• 2 x M3x4 screw. This is used to attach the cover to the actual switch on the wall. These are quite small and basically screw in from the bottom and squeeze the cover locked. If your wall switch is a bit smaller, you could use longer screws, but I would not recommend too long a screw, as that would compromise stability a bit. 

The two extra holes in the front, were modeled so I could directly screw the cover to the holes in the wall switch, but I couldn't find screws in the correct size (at least - I didn't have them). I believe they are 3mm, but a different thread than the ones I had. 

Just to make sure: It is NOT the idea to remove the actual wall switch. This "bolts" over it without damaging the original switch. Reference the pictures to get an idea how it attaches. One picture shows the wall socket without the rocker, and then another picture shows the cover over the wall socket. 

I have created this in Fusion 360, fully parametric. If there is a demand for it, I might decide to release the F360 file as well. I might create a 2-switch and 3-switch variant, but the aestetics might be wrong, as these MOES/Tuya switches are slanted (except the 4-gang). I'll see if it "works" :)

The switches I used are these:  https://www.amazon.de/Wireless-Mechanical-Controller-Transmitter-Automation/dp/B09VDDFHSC/ref=sr_1_2_sspa?sr=8-2-spons&aref=2gBj3P3yEj&sp_csd=d2lkZ2V0TmFtZT1zcF9hdGY

The 4-gang, 12 scene one is this one (this one exists in black as well):   https://www.amazon.de/-/en/Switching-Buttons-Automation-Requires-Included/dp/B0BGBM2B1P/ref=pd_bxgy_thbs_d_sccl_1/258-4980979-7900316

This might work with other switches as well, but most likely the holes would not align. Although there are switches from other brands (like EMOS, ANCLLO and so on) that look exactly the same. Some of these are available in other colors as well. So they might work as well. 

I printed these in Elegoo Rapid PLA White, at 0.2mm height. No supports. I did make sure the flat side is on the bottom. Also, if you plan to glue the scene switch to the cover, I would recommend using a non-textured PEI plate as the texture has issues with glueing.