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Published 20 hours ago • verified publisher icon ttlappalainen

PGN spesification

Open haavardholm opened this issue 5 years ago • 3 comments

Hello, I am trying to get into the NMEA PGN format.

I find from nmea.org or other places the content of pgn, like PGN 129029 : field 1Sequence ID field 2Position date field 3Position time field 4Latitude field 5Longitude field 6Altitude ....

I do however not find more detailed info : How many bits are used to specify each field and how are each field encoded.

Any hints of where to find that info ?

Best regards Håvard

haavardholm avatar Feb 20 '20 18:02 haavardholm

There is ready message builder SetN2kGNSS (or SetN2kPGN129029) in library N2kMessages module.

ttlappalainen avatar Feb 20 '20 19:02 ttlappalainen

The routine look good, but how did you figure out that ? Did you have some samples sentences and figured out by testing and trying or was it documented somewhere ?

haavardholm avatar Feb 20 '20 19:02 haavardholm

Most messages will be found on OpenSkipper project or canboat project pgn.h https://github.com/canboat/canboat/blob/master/analyzer/pgn.h OpenSkipper N2k data descriptions has been originally inherited from canboat.

It does not explain all what I am doing with tested code on N2kMessages

ttlappalainen avatar Feb 20 '20 19:02 ttlappalainen