Re: [gpsd-users] GPSD SOCK output without PPS

[Gary E. Miller]

Yo Zach!

On Wed, 12 Sep 2018 17:18:45 -0400
Zach LaCelle <address@hidden> wrote:

> Command line args:
> 
> /usr/sbin/gpsd -N -n /dev/ublox

Odd.  

Why the -N?  That is mostly for debug.  gpsd is usually daemonized.

Why /dev/ublox?  I assume that is just a link to /dev/ttyUSB0?

If you are doing hotplugging often better to use the -F option.  That
lets udevd handle the hot plug events.  Hot plugging hhard coded pors
is not really supported by gpsd.

> Not using systemd, launching through System V using /etc/init.d/gpsd
> script.

That works.

> I do have a /dev/pps0 device which is added when I attach the
> receiver. ppstest returns the following (and you mentioned it's
> disconnected, so no surprise):

Yeah, as expected.  The USB driver brings out PPS, but the EVK-7 does
not bring out PPS.

> As I understand it, the SOCK connection includes PPS information,
> correct?

Yes, if available, very similar to the SHM connection.  

PPS over USB only good to around 1 micro second.

> My thought was I just set up SOCK, then once I get PPS
> integrated (either by wiring up the 7 or by getting an EVK-8) I won't
> have any config changes.

I think you'll still need ito add a PPS wire on the EVK-8 to get it to the
USB.  Other 8 boards have it wired up already, for a lot less cash.

Once again, SOCK or SHM, pretty much the same results.  If one works for
you no reason to change.

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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