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

[Hal Murray]

>> address@hidden said:
>>> Nothing confusing to gpsd at all.  gpsd is just reporting there is no PPS 
or
>>> PPS available on that serial line.  Which is exactly true.  Maybe the
>>> message could be clearer. 

address@hidden said:
>> 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 

The real problem is that gpsd doesn't have the idea of stand-alone PPS files 
(/dev/pps0 and such).  It assumes everything on the command line is a TTY and 
that it can get the PPS stuff from there.

I was pointing out that things get messy if you try to make decisions based 
on the presence of PPS data when you open the TTY file and then setup the 
RFC2783 stuff from there.

I think the fix will require something like a flag on the command line that 
says the next parameter is the PPS for the previous TTY.  Maybe:
  gpsd /dev/ttyX0 --pps /dev/pps0


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