JollyOrc@dymaxion @akareilly There are actually Hue/Zigbee wall switches that use energy harvesting. Very nifty: That satisfying "click" is thus the very thing that briefly powers up the radio element to send the signal.
The main challenge in this household to switch out all the legacy wall switches with that system is a) the ridiculous cost of them and b) I'd still need to hotwire the circuit behind the switch and then have no easy option to power off the lights when needed (most zigbee lights get reset by switching them on and off 6 times in fast order.. )
Which is why of the 16ish light strips on my ceiling, half are controlled by the Hue basestation, half by the Tradfri one and half by the Home Assistant - and a few by nothing at all. And to change that, I'll have to basically dismantle the whole thing to reset each light strip manually...
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