Just to add, this is now a module: http://www.espruino.com/Puck.js+iBeacon
@Gordon 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.
Just to add, this is now a module: http://www.espruino.com/Puck.js+iBeacon