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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
Ahh, ok - Micro Python doesn't actually use Bluetooth as far as I know - it's just a proprietary radio transmission because they couldn't fit the BLE stack and micro python in the micro:bit.
With Espruino on micro:bit you have to use BLE, you can't do proprietary radio.
However you can use BLE to transmit data in a standard BLE way by sending 'advertising data' and then scanning for it with the other micro:bit. Again, check out the BLE page linked above.