[SOLVED] TinyGPS++ with Asset Tracker

[bko]

See my post here that explains the concept of "circular error probable". So when a GPS says 3m accuracy, what they typically mean is CEP is 3m so 50% of the readings are within 3m of the actual location.

Is there a debugged asset tracker GPS library yet?

That sounds about right. The GPS needs to “see” the satellites in order to work and four satellites is the minimum number for a valid fix, but when it “sees” more satellites it can improve the potential error in the fix by combining all the data. So going outside should improve your fix and going inside degrades it. By how much it is degraded depends on the GPS itself (sensitivity and number of channels), on the antenna (gain and directionality), and somewhat on the software used to read the G…