I would more look into resetting the accelerometer (run until battery is empty or does a soft reset work?) instead of wiping the code.
Resetting the watch did the trick for HRM so I honestly will try everything as long as I don't have to return it (sphipping fee was mental)
@bb5 started
Espruino is a JavaScript interpreter for low-power Microcontrollers. This site is both a support community for Espruino and a place to share what you are working on.
I would more look into resetting the accelerometer (run until battery is empty or does a soft reset work?) instead of wiping the code.