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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.
@Gordon
Nobody? I should add that you're not going to brick your device with this - worst case you have to enter bootloader mode again and re-flash 1v89.
Instructions on flashing are here: http://www.espruino.com/Puck.js#firmware-updates