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Bed Occupancy Sensor?
(lemmy.ml)
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
I don’t have one myself, but several of the guys on YouTube use them. See “The Home Automation Guy” or “Smart Home Solver“. I can’t remember the brand they use.