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What are your three automations you are fond of?
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Discussion about general home automation ideas and projects, home automation protocols like Z-wave, Zigbee, Matter, etc, and home automation software and hubs like HomeSeer, Home Assistant, OpenHAB, Homey.
I use X10 for all lights. It's an old standard getting harder and harder to get, but it's just dumb enough to not be a security concern and smart enough to switch off all lights from a remote in my bedroom.