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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
The serial number comes direct from
FICR->DEVICE_IDon the nRF52 - Nordic say it is unique but I'm not sure how they allocate it! If you do a search there are a few forum posts on Nordic's site about it.Also worth noting that on recent builds I swapped the order that bytes are returned around so the value matched what you'd get if you requested the serial number using an nRF52 programmer