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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
Ok, great.
It's worth noting that with any recent firmware (2v01 and later I think) all Espruino devices will go to a lower-power connection mode (200ms connection interval vs 7.5ms) when connected by idle for around a minute - so you should find that it's not actually using significantly more power than if it was just sitting there advertising.
You can tweak what happens with the connection using
NRF.setConnectionInterval- so if you need the speed all the time you can still tell Espruino to do that.