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Re: [gpsd-users] Communication loss with GR-701W

From: Gary E. Miller
Subject: Re: [gpsd-users] Communication loss with GR-701W
Date: Fri, 24 May 2019 10:38:47 -0700

Yo Benoît!

On Thu, 23 May 2019 12:18:57 +0200
Benoît Thébaudeau <address@hidden> wrote:

> > WHat happens if you try "ubxtool -b BINARY" after the GPS goes
> > silent?  
> With "ubxtool -P 14 -e BINARY" alone, not much happens:

I was probably still in BINARY mode.  But thhe suspicion is that
it is the multiple reconfigs that wakes it up again.

Since you did not use "-v 2" there are things maybe happening that you
would not see.

> ubxtool -P 14 -e BINARY

Note this one gets the NACK:

>  Rate set: Class: NAV(0x1) ID: SAT(0x35) Rate:0


>  ACK to: Class: CFG(0x6) ID: MSG(0x1)

UBX-CFG-SAT is not in protver 14. That has been fixed in git head.

Unclear why 6 config messages sent, but 12 ACK/NACKs received.  I suspect
stuck buffer somewhere...

>  ACK to: Class: CFG(0x6) ID: MSG(0x1)
> Note there are NAKs.

> > Making the u-blox driver wait for ACK just moved up a posion on my
> > TODO list.  I'm still working on the ZED-F9.  A lot changed from 8
> > to 9. Basic functionality is now working, in git head, but a lot of
> > corner cases left to check.  
> Thanks for you hard work! Note that there is no hurry for me.

As shown by you using old software.  git head has many u-blox improvements,
but mostly for the 9 series.

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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