Hello, the forum contains many posts about sensors which fail to continue working after a low battery.
through observing the logs this poster determined the sensors mac address was somehow being corrupted in its RAM , and this one detailed 5 blinks = fail to pair, 3 blinks ok.
The wyze sense is based on the TI CC13x0 system on a chip, TI manual link there are a number of references in the manual to resetting it , and the chip itself has a reset pin.
i had 8 (7 contact & 1 motion) bricked sensors, and have been experimenting on how to unbrick them. I have unbricked a motion sensor by applying an overvoltage of 4.5v in lieu of the 3v cell ( maybe a peer on the forum or at Wyze labs can repeat this to verify?) , but have yet to find a way to unbrick contact sensors - still 5 blinks. if there are other ppl in the forum who have any suggestions, i would be more than happy to experiment on my bricked sensors, maybe together we might find a workaround. thanks