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Re: [gpsd-dev] [Patch Submission] $GPVTG w/magnetic course

From: teyrana
Subject: Re: [gpsd-dev] [Patch Submission] $GPVTG w/magnetic course
Date: Fri, 15 Jun 2018 22:37:21 -0400

Oh, are you referring specifically to the sentences *we* have configured? 

Fair points though.  Thanks for the heads up! :)

(and yes, we'll probably be adjusting the sentences, as among other things, we're having issues getting a PPS output.)

Daniel Williams
858-220-8134 (Mobile)

On Fri, Jun 15, 2018 at 5:57 PM, Gary E. Miller <address@hidden> wrote:
Yo teyrana!

On Fri, 15 Jun 2018 17:15:30 -0400
teyrana <address@hidden> wrote:

> I'm working on getting a better log file for you. The one I've been
> using for development is only about 30s, and doesn't have any startup
> messages.

Cool.  That allows for permanent regression tests, so this thing stays
working once we get it working.

> > Also, did you have any luck replacing the deprecated GPGGA in your
> > GPS 
> output
> We haven't been trying to.... should we? Why? What's the problem with
> GGA?

Well, being deprecated should be sufficient.

One issue is that GGA is specifically limited to reporting 0 to 12
satellites seen.  Sometimes I see 28 on a u-blox 8.

Another issue is the inability to report whether the fix is 2D, 3D, DR,
RTK, or fixed position.

It reports the obsolete:  Differential reference station ID.

You have no sentence that reports the year, month or day.  This has
been known to cause interesting failure modes.

Gary E. Miller Rellim 109 NW Wilmington Ave., Suite E, Bend, OR 97703
        address@hidden  Tel:+1 541 382 8588

            Veritas liberabit vos. -- Quid est veritas?
    "If you can’t measure it, you can’t improve it." - Lord Kelvin

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