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I have an esp32 next to my bed. I log the rssi strength and with that i know when i was in the bed and when i changed position. It also has a pir which detects
by qwertox 2y ago
I have an esp32 next to my bed. I log the rssi strength and with that i know when i was in the bed and when i changed position. It also has a pir which detects movement, but tracking the rssi is good enough. A phone would be just as good, and I wouldn't be surprised if some sdk tracks the rssi of the phone to check if something changes around the phone. It's very telling.
- polishdude20 2y agoOh that's clever! Can you explain more how the rssi changes when you change positions? Is it fairly obvious in a graph?
- qwertox 2y agoIt's like this https://imgur.com/a/SLrGHas https://imgur.com/a/SLrGHas I was in bed from close to midnight to somewhat before 8:00.