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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 definitely worth trying the vibration clock app I added above - while not morse code it feels pretty usable.
I'm afraid not, no... Pretty much all the Bluetooth Audio devices use normal Bluetooth, not 'Bluetooth low energy'.