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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
Are you sure you flashed the correct firmware? That can often happen if you write the firmware for a different device (or a broken firmware). It's easy to fix - just reflash.
You can also try powering on while holding the button for 5 seconds or so - it'll try and load Espruino but will make sure no saved code is loaded.