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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
I posted a reply in another thread about GPS recently but the US's own website states they expect ~5m from a phone (where it can download live correction data), so I'm really not sure where the 2.5m figure came from - if you achieved that, it may have just been by chance you had extremely good conditions that day