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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
Did you actually type
save()to save your code?Also, I'd check that the button (or the pin it is connected to) isn't help down - if the button is held while Espruino boots then it won't load the saved code