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Re: [gpsd-users] Product Report: ublox USB dongle on Debian 9.5
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From: |
Gary E. Miller |
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Subject: |
Re: [gpsd-users] Product Report: ublox USB dongle on Debian 9.5 |
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Date: |
Fri, 26 Oct 2018 14:24:46 -0700 |
Yo Charles!
On Fri, 26 Oct 2018 14:56:37 -0600
Charles Curley <address@hidden> wrote:
> My GlobalSat BU 353 having died on me,
It happens.
> I ordered a ublox based dongle from Amazon.
Pretty vague.
> Once I got it working, it seems to be rock solid. I have it on the
> north side of a house with metal siding and a metal roof, just outside
> a window.
You'll find it works ine inside the window too.
> 19:30:00 $GNTXT,01,01,02,HW UBX-M8030 00080000*60
It is an M8030, vanilla u-blox 8. Good. I have one now, and have
played with several of them.
> 19:30:00 $GNTXT,01,01,02,ROM CORE 3.01 (107888)*2B
ROM, not flash, so updates not possible. OTOH, 3.01 may be the
best for the 8 that u-blox ever ships.
> 19:30:00 $GNTXT,01,01,02,FWVER=3DSPG 3.01*46
SPG is the basic firmware, nothing special.
> So far so good. Now, how does one tell gpsd where to find the thing?
Easy:
# gpsd -nG /dev/ttyACM0
Done.
> I installed my own copy of /etc/systemd/gpsd.service, modified it to
> read:
Oh, systemd, there is your mistake. Never use that myself. Maybe
someone else knows...
I think you need a udev file to tell udev to tell systemd to tell gpsd
when the device is plugged in. Makes my head spin...
> # ublox:
> ExecStart=/usr/local/sbin/gpsd -nGb /dev/ttyACM0
You do NOT want -b. That breaks ubxtool. And that looks nothing like
the usual systemd config which prestarts gpsd with -F.
> N.b.: I am not sure the -b option to gpsd is necessary. I have not
> experimented with it.
You do NOT want it. It breaks ubxtool, and some autodetection.
> Something for further research: can we get udev to report the device
> name to systemd so systemd can feed it to gpsd.service?
There is a udev file to do that, no idea where it is. I never use it.
If you are gonna work with systemd you are gonna need a systemd person
to help.
Did you try the files in git head in the systemd directory?
RGDS
GARY
---------------------------------------------------------------------------
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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