already exists, anyway I'll be doing a segment on in wall micro controllers on Hubitat Live tomorrow.
RGBgenie sells a Zigbee dimmer and switch (left device in the picture below, Nano is on the right), I have some 30 of these in production now and have replaced my previous Aeon Micros with them
Anyway, I'm pretty sure that @Gnant will be running some sort of promo on these...
