I’m mixing and matching a few different systems and technologies, and I want to find a cheap way of steathily controlling them from the existing wall switches. I have already done this in places with Fibaro and other in wall devices.
However I now want to be able to just send commands from the wall switch. So what I need is a small battery powered module which I can hide behind the light switch which will send out some RF signals which I can interpret on the server side.
Does anyone have any ideas? I know that I could probably butcher one of those keyfob style remotes but that seems very messy, and also I would prefer not to use momentary switches if I can avoid it as these are relatively expensive compared with bog standard 1 or 2 way latching switches.