Aprs

APRS is widely used and inconsistently implemented. The spec is several documents written over twenty-odd years (APRS 1.0.1, the 1.1 and 1.2 addenda, now merged into APRS12c), real-world packets often bend the rules, and in places the text contradicts itself. Every decoder is somebody’s own reading of all that, and they disagree with each other. I’ve written five APRS libraries, one each in C#, Rust, Python, TypeScript and C, plus a shared set of test cases. All five give the same answer for every packet I’ve tested them with. They’re all at version 1.0.1. ...