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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
Ok, so:
require("foo")-> hang*
require("fs")-> ok*
require("fs").readdir()-> hangI'd be pretty sure it's the way your SD card is formatted, or the size of it. Having said that I've tried up to 16gb cards and they seem to work fine.