Re: [gpsd-dev] PPS not showing in gpsmon/gpsd on RPi 3

[Gary E. Miller]

Yo Eric!

On Mon, 25 Apr 2016 09:30:28 -0400
"Eric S. Raymond" <address@hidden> wrote:

> > There are two cases of "no PPS".  One is that nothing is wired to
> > that pin.    
> 
> Right.  We know this isn't the problem as ppstest can see RFC2783
> events through .dev/pps0

Well, ppstest is not gpsd, so not exactly QED.

> > The other is that everything is wired up correctly, but the GPS
> > device is smart enough to mask off the PPS when it isn't valid, for
> > example when first powered on and it isn't listening to any
> > satellites yet.  
> 
> I can see by the blinkenlight that the HAT has a fix.

Even if the GPS has a fix, gpsd has to know that so as not to block the PPS.


> > working.  Did rain or whatever cause the number of satellites the
> > receiver can hear to fall too low, or did the cable get unplugged?  
> 
> No, I can check that by seeing fixes with gpsmon.

Good.

> Currently leaning towards the theory that there's a previously
> undiagnosed race conedition in /de/pps opening.

The 0666 test shoulda resolved that in moments.

When you are running gpsd, what does ntpshmon tell you?

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

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