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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.
@DrAzzy
Did you lose the call to initialize the filesystem?
Have you tried disconnecting it from all power, waiting a few minutes, and plugging it back in? I routinely encounter situations where a piece of hardware gets unhappy, and brief power cycles don't work (presumably because of the caps on the board?)