Try https://github.com/espruino/Espruino/blob/master/libs/banglejs/jswrap_bangle.c
@user140377 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.
Try https://github.com/espruino/Espruino/blob/master/libs/banglejs/jswrap_bangle.c