Re: gpsd and ntpsec error in ntp.conf

[Massimiliano Fago]

Dear Florian,

thanks for your replay.

no, I'm not sure that this line "refclock shm unit 1 minpoll4 maxpoll
4 refid PPS flag4 1 prefer" is correct.
I don't remember where I found it.

In my configuration I need to adjust my raspberry time to a gpsd pps
time. (I need precision time) but I don't know how to exactly
configure the file ntp.conf.

Where can I find all documentation about ntp.conf configuration string?

Thanks,
Massimiliano

Il giorno lun 21 set 2020 alle ore 14:14 Florian Kiera
<florian.kiera@logicway.de> ha scritto:
>
> Heyo Massimiliano,
>
> are you sure that the line 16 "refclock shm unit 1 minpoll4 maxpoll 4 refid 
> PPS flag4 1 prefer" is correct? May its supposed to mean ""refclock shm unit 
> 1 minpoll 4 maxpoll 4 refid PPS flag4 1 prefer" (a little mistake with a 
> missing whitespace?). Sadly I dont have anything to test it with. Just some 
> random guess as "refclock shm unit 0 time1 -0.0900 refid GPS flag4 1 
> noselect" etc dont have any issue with column 12 (last latter of the shm).
>
> Regards
> Florian
>
> Am 21.09.20 um 13:09 schrieb Massimiliano Fago:
>
> Dear all,
>
> (gpsd: 3.21.1~dev (revision release-3.21-209-g3cbf9bf1a)
> and
> ntpd ntpsec-1.1.9+ 2020-09-21T10:50:13Z (git rev 4f3fed2aa))
>
> I recently noticed that I have this error when starting the ntpd service:
>
> set 21 13:00:29 raspberrypi ntpd[1114]: INIT: Command line: 
> /usr/local/sbin/ntpd -g
> set 21 13:00:29 raspberrypi ntpd[1114]: 2020-09-21T13:00:29 ntpd[1114]: INIT: 
> ntpd ntpsec-1.1.9+ 2020-09-21T10:50:13Z (g
> set 21 13:00:29 raspberrypi ntpd[1114]: 2020-09-21T13:00:29 ntpd[1114]: INIT: 
> Command line: /usr/local/sbin/ntpd -g
> set 21 13:00:29 raspberrypi systemd[1]: Started Network Time Service.
> set 21 13:00:29 raspberrypi ntpd[1115]: INIT: precision = 0.989 usec (-20)
> set 21 13:00:29 raspberrypi ntpd[1115]: INIT: successfully locked into RAM
> set 21 13:00:29 raspberrypi ntpd[1115]: CONFIG: readconfig: parsing file: 
> /etc/ntp.conf
> set 21 13:00:29 raspberrypi ntpd[1115]: CONFIG: line 16 column 12 syntax 
> error, unexpected T_String, expecting T_EOC
> set 21 13:00:29 raspberrypi ntpd[1115]: CONFIG: syntax error in /etc/ntp.conf 
> line 16, column 12
> set 21 13:00:29 raspberrypi ntpd[1115]: LOG: switching logging to file 
> /var/log/ntpd.log
>
> my ntp.conf is this:
>
> #pool us.pool.ntp.org iburst
>
> #driftfile /var/lib/ntp/ntp.drift
> #logfile /var/log/ntp.log
>
> restrict default kod nomodify notrap nopeer noquery
> restrict -6 default kod nomodify notrap nopeer noquery
> restrict 127.0.0.1 mask 255.255.255.0
> restrict -6 ::1
> restrict 192.168.14.0 mask 255.255.255.0
>
> # GPS PPS reference (NTP1)
> #server 127.127.28.2 minpoll 4 maxpoll 4 prefer true
> #fudge 127.127.28.2 refid PPS
> ##fudge 127.127.28.1 flag1 1
> refclock shm unit 1 minpoll4 maxpoll 4 refid PPS flag4 1 prefer
>
> # GPS Serial data reference (NTP0)
> #server 127.127.28.0 minpoll 4 maxpoll 4
> #fudge 127.127.28.0 time1 0.9999 refid GPS
> refclock shm unit 0 time1 -0.0900 refid GPS flag4 1 noselect
>
> #MFA aggiunto il 30/09/2019
> #server 127.127.43.0     # standard Linux RTC
>
> #Log
> driftfile /var/lib/ntp/ntp.drift
>
> statsdir /var/log/ntpstats/
>
> Thanks,
> Massimiliano
>
> --
> ###############################################################
> Florian Kiera               Tel:    (0385) 3993 93 58
> Logic Way GmbH
> Hagenower Strasse 73        HTTP:   http://www.logicway.de
> 19061 Schwerin              email:  mailto:florian.kiera@logicway.de
> ###############################################################



--
Massimiliano Fago
Senior Software Engineer
massimiliano.fago@gmail.com
skype: massimomfa