[time-nuts] NMEA Checksums
hmurray at megapathdsl.net
Wed May 28 03:49:39 EDT 2008
> When calculating the checksum for an NMEA message, are the commas
> taken into account or ignored?
I'd expect that to be covered in the documentation that describes the details
on the NMEA sentences the device supports.
I've got a couple Garmin pdfs. Both have the same paragraph with all the
details. They are in no-copy mode so I won't copy them here. It does say
that any letters need to be upper case.
Some documentation gives examples.. You can get lots of examples from a real
GPS unit and your favorite terminal program. I've used them for debugging
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