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I would love to see open source copies of those. Apparently they use NO power unless you press their buttons which means they can last for years.

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I got some Aqara buttons and switches from cloudfree.shop, they're closed-source but local network (Zigbee) only—combined with Home Assistant, which is open source, I think this is what you want!

100%. Plus they could be way cheaper (i think).

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