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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.
Ganblejs
Ooh, it works for EAN-13. It just uses the build in error checking. Code 128 just doesn't work. It needs a higher resolution.
Diagonal works if we have anti aliassing. I would have to look. I don't know if bangle has that. I don't think it has.