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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
Just checking - are you using up to date firmware on the Puck? (1v91?)
If you have a second phone, it might be worth trying to use nRF Connect on that to try and connect to the first one, just to make sure it is actually working ok.