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"i built a bed occupancy sensor so hass knows if we're in bed or not,"

Do you use a pressure sensor or PIR for that?

2x of these https://www.adafruit.com/product/1071 between the mattress and box spring, ultimately hooked up to a raspi zero w

Aha those are exactly what I was looking for a few years ago when I tried to do the same, I only found tiny ones with difficult to use interfaces. Thanks!

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