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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
Are you powering the board from USB on a computer? If so, the board will have the 'console' interface on USB, and not Bluetooth.
You can power it from a battery or USB wall adaptor, or you can connect via USB and type
Serial1.setConsole()which will move the console back onto Bluetooth.Of it's not that, i'd check the two connections nearest the aerial on the Bluetooth module. Those are TX and RX, and if there is a bad connection it will have the effect you describe.