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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
E.openFileis for FAT filesystems (eg SD card) - it's not something that's even supported on Bangle.jsStorage.openuses the Bangle.js flash storage, so that's that one I'd suggest. But even then, if you're just writing simple files (and not appending/streaming data) I'd suggest just usingStorage.write