Here are my notes when building BlueZ that might be helpful: https://github.com/beaufortfrancois/sandbox/blob/gh-pages/web-bluetooth/Bluez.md
@François 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.
Here are my notes when building BlueZ that might be helpful: https://github.com/beaufortfrancois/sandbox/blob/gh-pages/web-bluetooth/Bluez.md