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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
It's a limitation of Bluetooth LE I believe. It is also possible to do 'out of band pairing' using a QR code right now I think.
It's not something that is implemented in JS at the moment but someone could probably implement it