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I'm looking for a single or dual Wi-Fi light switch that I can activate with Linux. It needs to fit a standard 2-gang switch box and/or include a trim plate that covers a 2-gang box. Anyone know of such a thing? I can't tell from the selection on Amazon if any of these work without installing some smartphone app. I'm based in the US.

At this point, I'd settle for a micro-remote controlled switch, if nothing else, and then just wire a Raspberry Pi to the contacts.

The current switches I have in the gang box now are like this one. I suppose there is a little room for a wider switch – like I just found a Z-Wave switch , but they don't list with dimensions of the switch so I don't know it will fit in the box next to the "regular" switch.

Bence Kaulics
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Will T.
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paraphrased from my answer here:

You could use the Belkin Wemo Light Switch, if you can find one (apparently Belkin aren't making new ones any more).

The initial configuration has to be done using the Belkin Wemo phone app, but once it's connected to your wireless network then you can forget the app and use Home Assistant instead.

I personally run Home Assistant on a Raspberry Pi 3 and have some Wemo switches and light bulbs. They're automatically detected with no extra configuration required.

Another option, which I saw the other day in this answer, is a batteryless Bluetooth Low Energy wall switch.
I can't find any to actually buy online, at the time of writing this answer, but they appear to be a good generic solution: pressing the switch generates enough power to send a BLE packet.
You'll still need something like Home Assistant to listen out for that event and act upon it, though.

Aaron F
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