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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 - that's another one that should also be fixed in the latest builds (not 1v89, but 1v90 when it comes out or the ones from GitHub).
Arrow functions, promises and template literals are still pretty new additions to the Espruino interpreter, so there's been a bit of tweaking needed to get them working reliably.