BLE
https://www.npmjs.com/package/noble
https://www.npmjs.com/package/@abandonware/noble
Machine Learning and Tensorflow Lite
https://www.nearform.com/blog/running-tensorflow-lite-on-nodewatch-bangle-js/
Example applications
https://github.com/espruino/BangleApps/
https://github.com/espruino/BangleApps/blob/master/apps/hidkbd/hid-keyboard.js
Developement
https://github.com/jh3y/create-bangle-app/
https://github.com/espruino/BangleApps/blob/master/README.md#developing-your-own-app
https://github.com/espruino/EspruinoTools
Puck.js
https://github.com/knolleary/puck-remote/blob/master/index.js