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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
Which OS are you using it with?
Any chance you have an Android/iOS phone you could try and connect from to check that you can actually connect ok?
Also, could you try powering up the Puck with the button held down (then release it when all 3 LEDs turn on)... That'll stop it loading any saved code, which could potentially have been causing you some problems if it was from an earlier version of the firmware