Hi Ray,
Thanks for the link. I think my networked GPS
(u-blox) has 1PPS. I haven't really checked it out. The
Garmin GLO2 doesn¡¯t have the capabilities. At least, that
is what I gather from ppscheck. This project doesn't need
it and hopefully the JS8CALL project doesn't either.
Fred N7FMH
-----Original Message-----
Sent: Friday, October 01, 2021 8:55 PM
Subject: Re: [direwolf] Repeating "GPSD:
Location fix is now 2D/3D"
Fred,
I know you've done the hard yards and it's
working for you but you may
still find this page about gpsd interesting.
FWIW I ran into the same 2D/3D problem as you
but I can't remember which
(RS232) GPS (Garmin 18 series or older Ublox)
I used at the time. I
ended up compiling GPSD from sources to get
an updated version. But this
was near enough to two years ago.
Ray vk2tv
On 2/10/21 9:18 am, Fred Hillhouse wrote:
>
> Hi David,
>
>
>
> Thanks for the update and how strange if
this was a gpsd thing.? What
> version were you running before?
>
> Version 3.17
>
> Gary¡¯s comment: Wow, that is 4 years
old.? You need to update that.
> 3.23.1 is current.
>
> I am not sure but came from the apt
repository. I didn¡¯t install gpsd
> initially on this RPI. I wouldn¡¯t have
done a build from source.
>
> Do you know what was the specific fix in
the newer GPSD that resolved
> your problem?
>
> Sorry I don¡¯t.
>
> Best regards,
>
> Fred N7FMH
>
> --David
> KI6ZHD
>
> On 10/01/2021 02:30 PM, Fred Hillhouse
wrote:
>
>? ? Problem has been resolved. I now get
a solid 3D fix.
>
>? ? The solution: update to the latest
revision of GPSD. Revision 3.23.1
>
>? ? As background, I have a Garmin GLO 2
which will support up to four
>? ? users. A similar unit is the Dual
XGPS160. I have used it in the
>? ? past for an Android tablet with the
hopes of also sharing with an
>? ? RPi. Currently, The tablet, RPI and
my PC are receiving data.
>
>? ? I was asked why I would use a GPS
like this. When running multiple
>? ? RPIs, which may not have sky view, a
GPS with a view can share
>? ? with each.
>
>? ? Best regards,
>
>? ? Fred N7FMH
>
>? ? Of *Fred Hillhouse
>? ? *Sent:* Wednesday, September 29, 2021
5:06 PM
>? ? *Subject:* Re: [direwolf] Repeating
"GPSD: Location fix is now 2D/3D"
>
>? ? GPS has been running for at least a
day.
>
>
>? ? Define "GPS has been running for at
least a day".? By default,
>? ? your GPS puck won't be activated by
gpsd and start listening for
>? ? GPS details until it has a listening
client like direwolf, cgps,
>? ? gpsmon, etc.? This seems to be a
default for minimizing power
>? ? consumption.? The gpsmon tool doens't
show how long it's been
>? ? running with a 3D fix but cgps does.
>
>? ? The GPS has had a device connected to
a device. It supports 4
>? ? different devices. One device is the
same RPi Direwolf is running
>? ? on but is an terminal window on my PC
with /cgps /running. Now a
>? ? second device (PC/u-center) is
connected.
>
>? ? What constitutes a ¡°very good¡± lock?
>
>
>? ? That's evidently a huge topic in
itself and is well outside the
>? ? scope of this Direwolf.? I did a
search for "gpsd 3d lock" and
>? ? this hit seems like a good start:
>
>? ?
>? ? <>
>
>? ? A key point in that article is that
though your system lists it's
>? ? using X satellites, it doesn't mean
it's hearing them well.? This
>? ? can be due to local RF interference,
etc.
>
>? ? I can see I have a 3D position all
the time now that my Windows PC
>? ? is connected. I am aware of the FIX
differences and how everything
>? ? can affect the satellite signal;
trees buildings, angle of
>? ? antenna, etc. Not being snarky! If
this was a serial GPS or a
>? ? USB-GPS (serial?) there would be no
BT layer and for serial, using
>? ? /dev/ttyS0 would be correct and USB
would be similar. Based on an
>? ? exchange with Robert KB8RCO it seems
this maybe the case here. If
>? ? may be that each of the four
possibilities need /dev/ttys0-3? In
>? ? the end, I will have learned a little
more.
>
>? ? This is what I get when running
/gpsmon/. Any clues there?
>
>
>? ? More information is available in cgps
but there are other tools
>? ? available to troubleshoot GPS issues
such as gpsprof but I've
>? ? never used them.? Ultimately, I don't
think your issue is with
>? ? Direwolf.. it's going to be somewhere
in the GPS into GPSD area.
>? ? I would start here:
>? ? <>
>
>? ? I will certainly check this group.
From my PC experience on
>? ? needing to actually connect to a COM
port, I wonder if a RPi
>? ? ¡°comport¡± must be connected as well.
Robert, KB8RCO, suggested
>? ? something regarding auto-connecting
at reboot but I haven¡¯t chased
>? ? that since the basic connection is
not functional yet.
>
>? ? Thank you!
>
>? ? Fred N7FMH
>
>
>? ? Screenshots from the u-blox u-center
app:
>
>? ?
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