Re: [gpsd-users] gpsd-users Digest, Vol 68, Issue 3

[Markus Juenemann]

Hi Etaoin 

is the following error message in the syslog relevant?

    > Aug??6 19:28:16 computer gpsd[374]: gpsd:ERROR: UDP device open error
    > can't connect to host/port pair.
    > Aug??6 19:28:16 computer gpsd[374]: gpsd:ERROR: initial GPS device
    > udp://192.168.13.100:10110 open failed

can you please run gpsd and ntpd in debug mode in the foreground and
post the output. Check the manual pages for the exact syntax but it is
similar tho this.

   ntpd -n -D ...
   gpsd -N -D ...

If you are familiar with Python you could use
https://github.com/mjuenema/python-ntpdshm module to read ntpd's shared
memory. I also have another Python module
https://github.com/mjuenema/python-gpsdshm to read gpsd's shared memory.

Markus Juenemann
address@hidden


On Tue, 8 Aug 2017, at 02:00 AM, address@hidden wrote:
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> Today's Topics:
> 
>    1. How to get shared memory access from gpsd to ntpd to work?
>       (Etaoin Shrdlu)
> 
> 
> ----------------------------------------------------------------------
> 
> Message: 1
> Date: Sun, 06 Aug 2017 20:23:51 +0100
> From: Etaoin Shrdlu <address@hidden>
> To: address@hidden
> Subject: [gpsd-users] How to get shared memory access from gpsd to
>       ntpd to work?
> Message-ID: <address@hidden>
> Content-Type: text/plain; charset="UTF-8"
> 
> Hi all,?
> 
> I've been battling for some time with getting ntpd to set the date/time
> from gpsd's shared memory locations. My GPS device is on the network
> and sends GPS messages every minute over UDP. This is picked up by gpsd
> and it appears I get a good fix with all the required data. It also
> looks as if the shared memory locations are being set up correctly. But
> whatever I do, ntpd time source "reach" stubbornly remains at zero,
> even when running ntpd as root. I would be most grateful if someone
> could cast their eyes on the configurations and log output below, and
> let me know if you can see were it's going wrong!?
> 
> 
> # syslog gpsd startup:?
> 
> Aug??6 19:28:16 computer gpsd[374]: gpsd:INFO: launching (Version 3.11)
> Aug??6 19:28:16 computer gpsd[374]: gpsd:INFO: listening on port gpsd
> Aug??6 19:28:16 computer gpsd[374]: gpsd:PROG: NTPD shmat(0,0,0)
> succeeded, segment 0
> Aug??6 19:28:16 computer gpsd[374]: gpsd:PROG: NTPD shmat(32769,0,0)
> succeeded, segment 1
> Aug??6 19:28:16 computer gpsd[374]: gpsd:PROG: NTPD shmat(65538,0,0)
> succeeded, segment 2
> Aug??6 19:28:16 computer gpsd[374]: gpsd:PROG: NTPD shmat(98307,0,0)
> succeeded, segment 3
> Aug??6 19:28:16 computer gpsd[374]: gpsd:PROG: successfully connected to
> the DBUS system bus
> Aug??6 19:28:16 computer gpsd[374]: gpsd:PROG: shmat() succeeded, segment
> 131076
> Aug??6 19:28:16 computer gpsd[374]: gpsd:PROG: shared-segment creation
> succeeded,
> Aug??6 19:28:16 computer gpsd[374]: gpsd:INFO: stashing device
> udp://192.168.13.100:10110 at slot 0
> Aug??6 19:28:16 computer gpsd[374]: gpsd:INFO: opening UDP feed at
> 192.168.13.100, port 10110.
> Aug??6 19:28:16 computer gpsd[374]: gpsd:ERROR: UDP device open error
> can't connect to host/port pair.
> Aug??6 19:28:16 computer gpsd[374]: gpsd:ERROR: initial GPS device
> udp://192.168.13.100:10110 open failed
> Aug??6 19:28:16 computer gpsd[374]: gpsd:INFO: running with effective
> group ID 20
> Aug??6 19:28:16 computer gpsd[374]: gpsd:INFO: running with effective
> user ID 110
> Aug??6 19:28:16 computer gpsd[374]: gpsd:INFO: startup at
> 2017-08-06T19:28:16.000Z (1502047696)
> 
> # syslog ntpd startup:
> 
> Aug??6 19:28:24 computer ntpd[609]: ntpd address@hidden Mon Jul 25
> 22:35:28 UTC 2016 (1)
> Aug??6 19:28:24 computer ntp[582]: Starting NTP server: ntpd.
> Aug??6 19:28:24 computer ntpd[652]: proto: precision = 0.781 usec
> Aug??6 19:28:24 computer ntpd[652]: Listen and drop on 0 v4wildcard
> 0.0.0.0 UDP 123
> Aug??6 19:28:24 computer systemd[1]: Started LSB: Start NTP daemon.
> Aug??6 19:28:25 computer ntpd[652]: Listen and drop on 1 v6wildcard ::
> UDP 123
> Aug??6 19:28:25 computer ntpd[652]: Listen normally on 2 lo 127.0.0.1 UDP
> 123
> Aug??6 19:28:25 computer ntpd[652]: Listen normally on 3 eth0
> 192.168.13.100 UDP 123
> Aug??6 19:28:25 computer ntpd[652]: Listen normally on 4 lo ::1 UDP 123
> Aug??6 19:28:25 computer ntpd[652]: Listen normally on 5 eth0
> fe80::6a89:f1d3:7ec0:510 UDP 123
> Aug??6 19:28:25 computer ntpd[652]: peers refreshed
> Aug??6 19:28:25 computer ntpd[652]: Listening on routing socket on fd #22
> for interface updates
> 
> # syslog gpsd sample:?
> 
> Aug??6 19:56:42 computer gpsd[374]: gpsd:IO: <= GPS:
> $GPGGA,185748.0,1234.567890,N,00012.345678,E,1,10,0.9,13.6,M,47.0,M,,*6B
> Aug??6 19:56:42 computer gpsd[374]: gpsd:PROG: GPGGA sentence timestamped
> 185748.00.
> Aug??6 19:56:42 computer gpsd[374]: gpsd:PROG: GPGGA starts a reporting
> cycle.
> Aug??6 19:56:42 computer gpsd[374]: gpsd:IO: <= GPS:
> $GPRMC,185748.0,A,1234.567890,N,00012.345678,E,0.0,,060817,0.0,E,A*2B
> Aug??6 19:56:42 computer gpsd[374]: gpsd:PROG: GPRMC sentence timestamped
> 185748.00.
> Aug??6 19:56:42 computer gpsd[374]: gpsd:PROG: GPRMC ends a reporting
> cycle.
> Aug??6 19:56:42 computer gpsd[374]: gpsd:IO: <= GPS:
> $GPVTG,,T,0.0,M,0.0,N,0.0,K,A*0D
> Aug??6 19:56:42 computer gpsd[374]: gpsd:IO: <= GPS:
> $GPGSA,A,2,01,03,06,09,11,17,19,22,23,31,,,1.2,0.9,0.8*31
> Aug??6 19:56:42 computer gpsd[374]: gpsd:PROG: GPGSA sets mode 2
> Aug??6 19:56:42 computer gpsd[374]: gpsd:IO: <= GPS:
> $GPGSV,4,1,13,01,31,136,41,03,67,068,35,06,32,303,31,09,34,202,41*78
> Aug??6 19:56:42 computer gpsd[374]: gpsd:PROG: Partial satellite data (1
> of 4).
> Aug??6 19:56:42 computer gpsd[374]: gpsd:IO: <= GPS:
> $GPGSV,4,2,13,11,09,153,39,17,40,243,40,19,42,272,30,22,42,082,40*78
> Aug??6 19:56:42 computer gpsd[374]: gpsd:PROG: Partial satellite data (2
> of 4).
> Aug??6 19:56:42 computer gpsd[374]: gpsd:IO: <= GPS:
> $GPGSV,4,3,13,23,61,174,46,31,19,047,36,12,04,329,,14,00,039,*76
> Aug??6 19:56:42 computer gpsd[374]: gpsd:PROG: Partial satellite data (3
> of 4).
> Aug??6 19:56:42 computer gpsd[374]: gpsd:IO: <= GPS:
> $GPGSV,4,4,13,25,01,001,*4C
> 
> 
> # /etc/default/gpsd
> 
> START_DAEMON="true"
> USBAUTO="false"
> DEVICES="udp://192.168.13.100:10110"
> GPSD_OPTIONS="-n -D5"
> 
> 
> # ntpd.conf:?
> 
> GPS Serial data reference (NTP0)
> server 127.127.28.0 minpoll 4 maxpoll 4 prefer
> fudge 127.127.28.0 time1 0.0 refid GPS
> 
> GPS PPS reference (NTP1)
> server 127.127.28.1 minpoll 4 maxpoll 4 prefer
> fudge 127.127.28.1 refid PPS
> 
> 
> # ntpq
> -p?????????????????????????????????????????????????????????????????????????????????????????????????????????????????????????????????????????Sun
> Aug??6 19:48:25 2017
> 
> ?????remote???????????refid??????st t when poll
> reach???delay???offset??jitter
> ==============================================================================
> ?SHM(0)??????????.GPS.????????????0
> l????-???16????0????0.000????0.000???0.000
> ?SHM(1)??????????.PPS.????????????0
> l????-???16????0????0.000????0.000???0.000
> 
> 
> # cat
> /proc/sysvipc/shm???????????????????????????????????????????????????????????????????????????????????????????????????????????????????????????Sun
> Aug??6 19:30:45 2017
> 
> ???????key??????shmid perms???????size??cpid??lpid
> nattch???uid???gid??cuid??cgid??????atime??????dtime??????ctime????????rss???????swap
> 1314148400??????????0???600?????????80???374???652??????2?????0?????0?????0?????0
> 1502047705??????????0 1502047696???????4096??????????0
> 1314148401??????32769???600?????????80???374???652??????2?????0?????0?????0?????0
> 1502047705??????????0 1502047696???????4096??????????0
> 1314148402??????65538???666?????????80???374???374??????1?????0?????0?????0?????0
> 1502047696??????????0 1502047696??????????0??????????0
> 1314148403??????98307???666?????????80???374???374??????1?????0?????0?????0?????0
> 1502047696??????????0 1502047696??????????0??????????0
> 1196446532?????131076???666??????31616???374???374??????1?????0?????0?????0?????0
> 1502047696??????????0 1502047696??????????0??????????0
> 
> 
> # gpsmon:
> 
> tcp://localhost:2947??????????JSON slave driver>
> (83)
> {"class":"VERSION","release":"3.11","rev":"3.11-3","proto_major":3,"proto_minor":9}
> (125)
> {"class":"DEVICES","devices":[{"class":"DEVICE","path":"udp://192.168.13.100:10110","activated":"2017-08-06T19:31:50.526Z"}]}
> (122)
> {"class":"WATCH","enable":true,"json":false,"nmea":false,"raw":2,"scaled":false,"timing":false,"split24":false,"pps":true}
> 
> tcp://localhost:2947??????????NMEA0183>
> ????????????????????????????????????????????????????????????????????????????????
> ?Time: 2017-08-06T18:33:45.000Z Lat:??12 34' 56.789" N Lon:???0 12'
> 34.567" E???
> ?????????????????????????????????? Cooked TPV
> ??????????????????????????????????
> ????????????????????????????????????????????????????????????????????????????????
> ? GPGGA GPRMC GPVTG GPGSA
> GPGSV?????????????????????????????????????????????????
> ?????????????????????????????????? Sentences
> ???????????????????????????????????
> ????????????????????????????????????????????????????????????????????????????????
> ?Ch PRN??Az El S/N
> ??Time:??????183345.0???????????Time:??????183345.0??????????
> ? 0???1 130 42??35 ??Latitude:???1234.567890
> N?????Latitude:??1234.567890???????
> ? 1???3??52 78??40 ??Longitude:??00012.34567 E?????Longitude:
> 00012.34567???????
> ? 2???9 201 22??40
> ??Speed:?????0.0????????????????Altitude:??109.4?????????????
> ? 3??11 151 20??45 ??Course:???????????????????????Quality:???1???Sats:
> 10??????
> ? 4??17 257 46??25 ??Status:????A???????FAA:
> A?????HDOP:??????0.9???????????????
> ? 5??19 288 41??34
> ??MagVar:????0.0??E?????????????Geoid:?????47.0??????????????
> ? 6??22??77 52??39 ????????????? RMC ????????????????????????? GGA
> ?????????????
> ? 7??23 180 50??38
> ?????????????????????????????????????????????????????????????
> ? 8??31??59 19??26 ??Mode: A2
> Sats:????????????????UTC:???????????RMS:??????????
> ? 9 120???0??0??35 ??DOP:
> H=0.9???V=0.8???P=1.2????MAJ:???????????MIN:??????????
> ?10??12 338??5???0
> ??TOFF:??3535.132782450?????????ORI:???????????LAT:??????????
> ?11??14??39??9???0
> ??PPS:??????????????????????????LON:???????????ALT:??????????
> ??????? GSV ????????????????? GSA + PPS ?????????????????????? GST
> ?????????????
> (83)
> {"class":"VERSION","release":"3.11","rev":"3.11-3","proto_major":3,"proto_minor":9}
> (125)
> {"class":"DEVICES","devices":[{"class":"DEVICE","path":"udp://192.168.13.100:10110","activated":"2017-08-06T19:31:50.526Z"}]}
> (122)
> {"class":"WATCH","enable":true,"json":false,"nmea":false,"raw":2,"scaled":false,"timing":false,"split24":false,"pps":true}
> (73)
> $GPGGA,183345.0,1234.567890,N,00012.345678,E,1,10,0.9,9.4,M,47.0,M,,*5D
> (71)
> $GPRMC,183345.0,A,1234.334342,N,00012.345678,E,0.0,,060817,0.0,E,A*24
> (34) $GPVTG,,T,0.0,M,0.0,N,0.0,K,A*0D
> (59) $GPGSA,A,2,01,03,06,09,11,17,19,22,23,31,,,1.2,0.9,0.8*31
> (70) $GPGSV,3,1,12,01,42,130,35,03,78,052,40,09,22,201,40,11,20,151,45*7C
> (70) $GPGSV,3,2,12,17,46,257,25,19,41,288,34,22,52,077,39,23,50,180,38*7B
> (61) $GPGSV,3,3,12,31,19,059,26,33,,,35,12,05,338,,14,09,039,*46
> 
> 
> 
> 
> 
> 
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