Re: Help With PPS / GPSD In Proxmox (Linux)

[Gary E. Miller]

Yo Ed!

On Sat, 30 Mar 2024 17:15:04 -0400
Ed Armstrong <eds_equipment@verizon.net> wrote:

> Hi, I'm having a little trouble getting the PPS to work well in
> proxmox. The device I am working with is a little fanless mini
> computer based on an Intel N100 processor. it is running Proxmox
> 8.1.4. According to their site, "Proxmox Virtual Environment is based
> on Debian GNU/Linux and uses a custom Linux Kernel."

Should be fine, depending...

> I've got the signal
> converted to proper serial voltage levels, and have it attached to a
> serial header on the motherboard. Signal looks very clean on an
> oscilloscope.

What does cgps show you?  Good fix?

> If I run ppscheck, I get the following.

Good.

> If I
> "systemctl stop gpsd.socket gpsd.service" And then try "gpsd -D 5 -N
> -n /dev/ttyS0", I get a bunch of data which includes

You removed all the bits I want to see, please send a full log, starting
from the very first line.

> gpsd:ERROR: unable to connect to the DBUS system bus

You can ignore that.  DBUS is a way for gpsd to tell you browser your
location.

> I believe the "gpsd:ERROR: unable to connect to the DBUS system bus"
> Is because I have no desktop present, if I understand that correctly.
> I am not sure what "gpsd:pROG: no /etc/gpsd/device-hook present,
> skipped running ACTIVATE hook" is all about, is this a problem?

It means just what it say, you don't have a device-hook file.  Not
a problem.

> gpsd:pROG: PPS:/dev/ttyS0 Assert ignored missing last_fixtime

You don't have a fix yet.  With out a fix, gpsd does now know he current
time, so the PPS, whch just marks the top of the second, has no use.

> As I need to connect "Lady Heather" so
> it can get information about the GPSDO.

Lady Heather and gpsd don't work together.  What receiver to you have that
has a GPSDO in it?

> Can anybody here suggest what I need to do to get this working? Or 
> perhaps tell me there is a problem which will prevent it and I should 
> just continue using the raspberry pi?

Send us at least 60 seconds of the log.  The output of gpsdebuginfo, run
as root, may also be helpful.

RGDS
GARY
---------------------------------------------------------------------------
Gary E. Miller Rellim 109 NW Wilmington Ave., Suite E, Bend, OR 97703
        gem@rellim.com  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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