I wrote a guide for that a few months ago. It is not totally completed but you should still be able to make your first experiments by following it: https://github.com/yerpj/TTN_with_Espruino/blob/master/QuickStart.md
@Jean-Philippe_Rey 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 wrote a guide for that a few months ago. It is not totally completed but you should still be able to make your first experiments by following it:
https://github.com/yerpj/TTN_with_Espruino/blob/master/QuickStart.md