Re: gpsd + chrony + pps

[Stéphane Péneau]

Hi !

Le 12/06/2020 à 14:54, Dan Williams a écrit :

For reference:

1. What OS brand & version are you using? 

    armbian (debian buster based)

2. Are you running this on a RPi, or a x86 computer?

Orange pi zero (arm). PPS is on gpio.

I just set this up last week with a serial/pps line + intel computer + gpsd- (3.20 / master) + chrony (2.11).   So, it definitely _CAN_ be done, but the setup can be finicky.

It's a very different setup, your timepulse is on the tty

I found the chrony.pps0.sock trick here:

https://medium.com/@srfilipek/chronos-a-stratum-1-time-server-e7a89cd808bc

(beaglebone and timepulse on gpio)

Stéphane

Daniel Williams  |  Software Engineer

dwilliams@nextdroid.com

On Fri, Jun 12, 2020 at 6:03 AM Stéphane Péneau <stephane.peneau@wanadoo.fr> wrote:

Hi!

I've made many tests to use the timepulse output on my U-blox ZED-F9P
with gpsd and chrony to get an accurate time.

I've never had a working solution if I try to use a socket like
chrony.ttyXX.sock.

But if I replace 'ttyXX' with my 'pps', it works.

refclock SOCK /var/run/chrony.pps0.sock refid PPS2 lock GNSS <== OK

refclock SOCK /var/run/chrony.ttyACM0.sock refid PPS2 lock GNSS <== NOK


Is there a mistake in the documentation ?

Stéphane