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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
Thanks!
Just to add that if you flash these, Espruino will start remembering the code that you saved between firmware updates. If I've changed the way data is stored internally then it can cause Espruino to hang at boot time.
To fix it, just press reset, and hold down BTN1 for a few seconds immediately after releasing reset (but not before or you'll enter bootloader mode with the pulsing blue LED).