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Pin switch option for doors?
(lemmy.world)
Home Assistant is open source home automation that puts local control and privacy first. Powered by a worldwide community of tinkerers and DIY enthusiasts. Perfect to run on a Raspberry Pi or a local server. Available for free at home-assistant.io
Check out Aqara water leak detectors. They have two external contacts that when they are bridged change the sensor state to ON. You can run wires to those contacts.
Interesting idea.