Added guide to run both Galmon and a Stratum 1 NTP server

[sjcjonker]

Please find some instructions to use the simpleRTK2B as a source for ubxtool and for gpsd/chrony as stratum 1 source. Although I'm not sure whether there is a desire to gather this in the code repo or elsewhere I thought this might be a good way to submit it anyway.

It's separate in a contrib dir. Feel free to reject etc.

[sjcjonker]

Added some more to the contrib dir:

• a nagios check to check for the last checkin of your observer
• a small README.md in the contrib dir

Again feel free to move to somewhere else, reject or ..

[akhepcat]

Followed this tutorial.
@sjcjonker - can you add a note/reminder to use the gpsd 'ubxtool' utility to set the correct tty speed for the ubx port so that it matches the speed of the serial tty? Otherwise the user may see garbage, or nothing.

I'd also recommend setting the speed > 38,400b in order to ensure timely message delivery and less dropped data.

Otherwise, the how-to worked great.

Thanks!

[sjcjonker]

Hi Leif, I don't seem to have "ubxtool" in the gpsd that I'm running. I didn't change the UART speed presently. I would only be able to do that via uCenter. In any case let me test/see and then update. Thx for the feedback. Stijn

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On 4 Mar 2020, at 20:58, Leif wrote: Followed this tutorial. @sjcjonker - can you add a note/reminder to use the gpsd 'ubxtool' utility to set the correct tty speed for the ubx port so that it matches the speed of the serial tty? Otherwise the user may see garbage, or nothing. I'd also recommend setting the speed > 38,400b in order to ensure timely message delivery and less dropped data. Otherwise, the how-to worked great. Thanks! -- You are receiving this because you were mentioned. Reply to this email directly or view it on GitHub: #107 (comment)

-- Yours Sincerely / Met Vriendelijke groet, Stijn Jonker [email protected]

[akhepcat]

Ah, right; gpsd/ubxtool is currently not distributed with most debian systems; however it will be, starting with ubuntu/focal and debian/bullseye. it's definitely in the source, though.

might just note it as "optional, fine tuning"

[sjcjonker]

Updated the pull request with the instructions to change baudrate, may I kindly ask if this matches your experiences as well? Thx

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On 5 Mar 2020, at 18:04, Leif wrote: Ah, right; gpsd/ubxtool is currently not distributed with most debian systems; however it will be, starting with ubuntu/focal and debian/bullseye. it's definitely in the source, though. might just note it as "optional, fine tuning" -- You are receiving this because you were mentioned. Reply to this email directly or view it on GitHub: #107 (comment)

-- Yours Sincerely / Met Vriendelijke groet, Stijn Jonker [email protected]

[akhepcat]

That's a brilliant add, and matches up well with my experience. That's the kind of little nudge that can make a project turn-up go super-quick,

Thanks for the indulgence!

[kpfleming]

I've just used this guide to setup my system (waiting for gpsd to select the proper baud rate...). A couple of notes:

• The cgps tool is in the gpsd-clients package, so that will need to be installed in order to use it for debugging.

• By default /dev/pps0 is only readable by root; when gpsd is used to read it that is fine, since it starts up as root and opens the device, but chrony does not start as root, so cannot open the device. I added a udev rule to set the permissions on /dev/pps0 to 0644.

[kpfleming]

Also, the 'baud rate' problem (where gpsd doesn't detect the baud rate properly) can be solved by dropping a file at /etc/systemd/system/gpsd.service.d/override.conf with the following contents:

[Service]
ExecStartPre=/usr/bin/stty -F /dev/ttyAMA0 speed 115200