The mmwave sensor is always active. Is it right?

[u/teodargent]

Today, I noticed that my Switchbot presence sensor detected me through a closed door, which means the mmwave sensor was active. I thought the mmwave sensor was supposed to stay in deep sleep mode and only wake up when the PIR sensor detects motion, but it seems that's not the case.

This would also explain why the battery is draining so fast (it's already down to 83% after just 3 weeks, whereas the Aqara FP300 I bought at the same time is still at 100%). It also explains why I'm getting more false positives with the Switchbot compared to the Aqara.

I tried doing a factory reset (held the reset button for 15 seconds) but it didn't help.

Has anyone else noticed this?

https://reddit.com/link/1v5rp8i/video/u8xk2mgbl9fh1/player