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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
The code you posted above is just for testing (if you paste that in the left of the web IDE). In reality Gadgetbridge should send a string a bit like that, but with artist/etc all filled in correctly. At least it does for me when music is playing. You could check with the
GB Debugapp.