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Re: [gpsd-dev] Missing TPV when there is no fix
From: |
Gary E. Miller |
Subject: |
Re: [gpsd-dev] Missing TPV when there is no fix |
Date: |
Tue, 19 Sep 2017 14:03:06 -0700 |
Yo Piotr!
On Tue, 19 Sep 2017 08:27:20 +0200
Piotr Figiel <address@hidden> wrote:
> Hi Gary,
>
> >> on recent gpsd [1] I stumbled on an issue similar to one reported
> >> already in the past [2] that TPV with mode = 1 (MODE_NO_FIX) is not
> >> being sent by the gpsd when the fix is lost. Instead no TPV at all
> >> was received by the clients by the time there was no fix. This
> >> affects use case when it's expected to detect fix loss on libgps
> >> client.
> > This is by design. No data in to gpsd, then no data out.
>
> The data does come in to gpsd, I attached log. You can see RMC with
> invalid fix there (Status field = 'V'). Information about missing fix
> is still information (valuable one in this use case). Actually the
> existing code seems to attempt to register that but fails to report it
> outside of gpsd.
Yes, since the data is invalid, there is nothing to pass on.
Once again, this is by design.
RGDS
GARY
---------------------------------------------------------------------------
Gary E. Miller Rellim 109 NW Wilmington Ave., Suite E, Bend, OR 97703
address@hidden Tel:+1 541 382 8588
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