[Top][All Lists]

[Date Prev][Date Next][Thread Prev][Thread Next][Date Index][Thread Index]

Re: [gpsd-dev] GNGNS unknown sentence with ublox

From: Gary E. Miller
Subject: Re: [gpsd-dev] GNGNS unknown sentence with ublox
Date: Tue, 12 Feb 2019 11:31:28 -0800

Yo Julien!

On Tue, 12 Feb 2019 18:16:22 +0000
Julien Bost <address@hidden> wrote:

> The 25 May 2016, in the "GNGNS unknown sentence with ublox" mailing,
> you talked about a new decoder you have coded for the GNGNS frames. I
> don't find it in the source code. I'am using the 3.17 version and i
> have the same warning as Max Schulze.

Current version is 3.18.1.  Plus many more improvement in git head.

You'll need to use a version not 18 months old.

Also, it would help if you can provide your GPS model.  If it is
u-blox, then the gpsd setup is not working.

> 2019-02-12T15:31:39.999569+00:00 TRX_00259 gpsd[5345]: gpsd:WARN:
> unknown sentence:
> "$GNGNS,153139.000,0031.7725,S,0003.4807,W,AA,13,0.8,4368.0,7.5,,*6E\x0d\x0a"

gpsd does not use any xxGNS sentence.  So not a problem, when the
GPS is properly configured.

> The problem for me is not the warning. The problem is GPSD do not see
> any position because we only received GNGNS frames.

Did you try using 'gpsctl -b' to properly config the GPS?

The problem for me is why is you GPS not configured properly by gpsd
at startup.

> It's probably
> because our GNSS chip does not see enought GPS satellites for a fix,

Possibly.  Your snippet is insufficient to tell.

> and the same for GLONASS. But the Chip can mix the two constellations
> and the result is returned with a GNGNS frame.

Yeah, but accuracy suffers.

> A short dump :
> $GNGSA,A,3,25,26,29,,,,,,,,,,3.2,1.4,2.8*2A
> $GNGSA,A,3,71,87,,,,,,,,,,,3.2,1.4,2.8*2B
> $GPVTG,30.3,T,,M,6.7,N,12.4,K,A*0B
> $GPGSV,2,1,06,16,20,208,30,20,64,090,48,21,34,163,24,25,24,046,37*74
> $GPGSV,2,2,06,26,48,203,31,29,11,111,28*74
> $GLGSV,2,1,05,76,68,275,40,75,43,002,44,87,22,232,31,71,23,099,28*6C
> $GLGSV,2,2,05,72,28,043,39*52
> $QZGSV,1,1,,,,,,,,,,,,,0.0*4B
> $QZGSA,1,1,,,,,,,,,,,,,0.0*5C
> $GLGSA,A,3,71,,,,,,,,,,,,,,,1.4,*2D
> $GNGNS,152312.621,0032.6779,S,00002.9615,W,AA,07,1.4,4327.6,7.5,,*6E

Why are you running a u-blox in NMEA mode at all?

> I will appreciate if you can give me some news about this new decoder.

I don't see any code in driver_nmea to decode any xxGNS.  When
gpsd reconfigures your GPS, it does not turn on xxGNS.  gpsd
has never used xxGNS.

Why isn't your GPS running the way gpsd set it up?

> Thanks.
> Best regards,
> Julien Bost
> _____________________________________________
> Manufacture Française des Pneumatiques MICHELIN
> Sce DORD/B2BF/CNT - Bureau: 132 F32 LAD
> Tel. int
>         : 936 7998
> Tél. ext
>         : +33 4 63 21 79 98
> Tél. mob
>         : +33 6 81 30 83 56
> _____________________________________________
> Retention: 90 jours - Confidentialité: D3

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

Attachment: pgp68_M55kWgF.pgp
Description: OpenPGP digital signature

reply via email to

[Prev in Thread] Current Thread [Next in Thread]