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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
Could you make absolutely sure that LightBlue explorer is shut down - maybe turn bluetooth off on your phone?
Basically Puck.js should boot up and start advertising all the time - but it stops as soon as something connects to it.
With the nRF tools I've definitely had a situation where it seems like they auto-connect to the Puck, which then makes it impossible to connect with anything else until you force them to disconnect... it could be something like that?