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Re: [gpsd-users] problem with Stratum-1-Microserver HOWTO


From: Charles Muggen
Subject: Re: [gpsd-users] problem with Stratum-1-Microserver HOWTO
Date: Fri, 9 Feb 2018 02:23:41 +0100

No comment about mini-UART BAUD rate related to clock speed on the Raspberry Pi 
3?
Is that a red herring?


> Sent: Thursday, February 08, 2018 at 8:10 PM
> From: "Gary E. Miller" <address@hidden>
> To: "gpsd users" <address@hidden>
> Subject: Re: [gpsd-users] problem with Stratum-1-Microserver HOWTO
>
> Yo Charles!
> 
> On Fri, 9 Feb 2018 01:30:01 +0100
> "Charles Muggen" <address@hidden> wrote:
> 
> > then I ran:
> > ntpq -p
> > 
> >      remote           refid      st t when poll reach   delay
> > offset  jitter
> > ==============================================================================
> > SHM(1)          .PPS.            0 l    -   64    0    0.000
> > 0.000   0.002 *SHM(0)          .GPS.            0 l   40   64   37
> > 0.000   43.706  52.221 us.pool.ntp.org .POOL.          16 p    -
> > 512    0    0.000    0.000   0.002
> 
> That looks good, except no PPS.
> 
> Look at the gpsd debug output:
> 
> # gpsd -nND 6 /dev/ttyAMA0 |& fgrep PPS
> 
> Should get lines like this:
> 
> gpsd:PROG: KPPS:/dev/pps0 assert  1518138392.000000408, sequence: 6041142, 
> clear   0.000000000, sequence: 0 - using: assert
> gpsd:PROG: KPPS:/dev/pps0 Assert cycle: 1518138392000000, duration:       0 @ 
>  1518138392.000000408
> gpsd:PROG: PPS:/dev/pps0 Assert cycle: 1518138392000000, duration:       0 @  
> 1518138392.000000408
> 
> 
> > I tried every combination of redirection.
> > ntpshmmon > file.txt
> > ntpshmmon 2> file.txt
> > ntpshmmon &> file.txt
> > ntpshmmon | tee file.txt
> > ntpshmmon |& file.txt
> > nothing works.
> 
> All should work fine.  Works for me.  Check your version:
> 
> # ntpshmmon -V
> ntpshmmon: version 3.18~dev (revision release-3.17-36-g9f6d73c7)
> 
> > I ran ppstest;
> > ppstest /dev/pps0
> > that's showing positive results.
> 
> Good.
> 
> > what else can I check?
> > is there a utility that shows the system time being micro-adjusted?
> 
> Yes, ntpq -p
> 
> 
> RGDS
> GARY
> ---------------------------------------------------------------------------
> Gary E. Miller Rellim 109 NW Wilmington Ave., Suite E, Bend, OR 97703
>       address@hidden  Tel:+1 541 382 8588
> 
>           Veritas liberabit vos. -- Quid est veritas?
>     "If you can’t measure it, you can’t improve it." - Lord Kelvin
>



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