[time-nuts] Magellan ASCII messages
Hal Murray
hmurray at megapathdsl.net
Fri Jan 19 22:16:38 EST 2007
> I have discovered that the receiver, on one of its ports (the aux
> port), is putting out Magellan ASCII strings prefixed with $PMGLK.
Looks like NMEA stuff.
I haven't found the NMEA specs on line. Looks like they (nmea.org) want BIG$
for it. I have found various pieces in specs from various manufacturers that
use it.
I think the PM is either a manufacturer code or a source/dest tag. I didn't
have any luck with google when looking for the GLK sentence. Maybe I didn't
ask the right question.
> On the sending side, the Odetics sends a series of commands to the
> receiver at power-up, all prefixed with $PMGLI. I've not been able to
> find any data on these strings at all.
That's probably turning something on or off.
I've worked with a few NMEA devices. The normal operation is that they send
a set of "sentences" every second or every N seconds. They have some default
pattern and usually a tiny flash chip to store the current settings. My
guess is the PMGLI is just smashing the GPS card to the "right" mode.
--
These are my opinions, not necessarily my employer's. I hate spam.
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