You are reading a single comment by @HughB and its replies.
Click here to read the full conversation.
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.
@HughB
Switches on the gps
Waits for a proper fix
Waits for the next fix
Works out the distance between 2 fixes and the next and the next.
If the GPS is good and stationery the distance between two fixes should be zero. A bad or inaccurate GPS might have as much as 20m between 2 stationery fixes.
Leave it running a while and it will show you the average and the max.