shm should also work. Question is if they are reading the same shm location.




William G. Unruh __| Canadian Institute for|____ Tel: +1(604)822-3273
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On Sat, 6 Aug 2016, Steve Horton wrote:


Not really Chris. I don't see a sock option in your configuration file. Gpsd 
should write time out to a device
file some where and chrony can read the time from that device file via a Unix 
domain socket. Like I said..look
into the sock option  and how it relates to gpsd.


On Aug 6, 2016 10:10 AM, "Chris Greenman" <chris.m.green...@gmail.com> wrote:

      Same thing.  Already tried it.


      On Aug 6, 2016 6:35 AM, "Steve Horton" <stevejhor...@gmail.com> wrote:

            I'd look closer at the SOCK option under the refclock section.
            https://chrony.tuxfamily.org/manual.html#refclock-directive

            On Aug 6, 2016 12:00 AM, "Chris Greenman" 
<chris.m.green...@gmail.com> wrote:
            >
            > Hello,
            >     I'm having an issue with getting time from gpsd.
            >
            > My setup is:
            > Raspberry Pi 3 running Jessie Lite
            > USB U-Blox gps
            >
            > gpsd is receiving NMEA from the GPS, cgps also shows time and 
position properly. 
            >
            > My chrony.conf is:
            >>
            >> server 0.us.pool.ntp.org
            >> server 1.us.pool.ntp.org
            >> server 2.us.pool.ntp.org
            >> server 3.us.pool.ntp.org
            >> driftfile /var/lib/chrony/drift
            >> allow
            >> refclock SHM 0 refid GPS precision 1e-1 offset 0.9999 delay 0.2
            >> makestep 1 -1
            >>
            > Chronyc sources shows this:
            >>
            >> $ chronyc sources
            >> 210 Number of sources = 5
            >> MS Name/IP address         Stratum Poll Reach LastRx Last sample
            >> 
===============================================================================
            >> #? GPS                           0   4     0   10y     +0ns[   
+0ns] +/-    0ns
            >> ^+ time-c.nist.gov               1   9   375   110    -23ms[  
-22ms] +/-   47ms
            >> ^* pool-96-248-122-64.cmdnnj     1  10   377    56  +9749us[  
+11ms] +/-   18ms
            >> ^- 104.156.99.226                2   9   377   367    +15ms[  
+17ms] +/-  107ms
            >> ^- 4.53.160.75
            >>
            > This system is going to be used on a boat and might not have 
internet.  I can tell
            that both programs are accessing the shared memory using ipcs -m:
            >
            >> ------ Shared Memory Segments --------
            >> key        shmid      owner      perms      bytes      nattch    
 status      
            >> 0x4e545030 0          root       600        80         2         
              
            >> 0x4e545031 32769      root       600        80         1
            >>
            > Any idea why chrony isn't getting time from the GPS?
            >
            > Thanks


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