Re: [gpsd-users] In which GR-601 does not equal GR-601W

[Gary E. Miller]

Yo Phil!

On Wed, 27 Jul 2016 18:22:11 -0400
Phil Stracchino <address@hidden> wrote:

> > So, your GPS is indeed a GR-601W!  
> 
> Well that's great news.  :)  And I have indeed jumped to an incorrect
> conclusion about it, and have egg on my face therefrom.
> 
> 
> So the next problem is why I can't seem to get ntps to see the GPS
> signals.  And possibly updating to the *CURRENT* release of gpsd will
> go at least some way towards fixing that.

Check out the www/gpsd-time-service-howto.txt, it has step by step
directions.

Once you get a somewhat current gpsd installed, your next step is to
run gpsd and then check the SHM output:

    # gpsd -n /dev/ttyUSB0
    # ntpshmmon
    ntpshmmon version 1
    #      Name Seen@                Clock                Real                 
L Prec
    sample NTP0 1469658476.791020864 1469658476.541874837 1469658476.703999996 
0  -1
    sample NTP1 1469658476.791027079 1469658476.000102462 1469658476.000000000 
0 -20
    sample NTP1 1469658477.000156795 1469658477.000124713 1469658477.000000000 
0 -20
    sample NTP0 1469658477.543001744 1469658477.542868714 1469658477.703999996 
0  -1
    sample NTP1 1469658478.001211671 1469658478.000129902 1469658478.000000000 
0 -20
    sample NTP0 1469658478.544318197 1469658478.544093779 1469658478.703999996 
0  -1
    sample NTP1 1469658479.001060953 1469658479.000117875 1469658479.000000000 
0 -20

When you have that, just configure ntpd to use refclock 28, as specified
in the howto.

RGDS
GARY
---------------------------------------------------------------------------
Gary E. Miller Rellim 109 NW Wilmington Ave., Suite E, Bend, OR 97703
        address@hidden  Tel:+1 541 382 8588

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