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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.
@fanoush
Well you did not explain much what the 'bluetooth receiver' and 'device, which has physical buttons' actually is. If it is not simple bluetooth speaker but some type of programmable computer with bluetooth on board than indeed it can possibly do BLE.