Re: Trouble with PPS on u-blox 7

[gpsd]

On 4/22/22 14:16, Gary E. Miller wrote:
> Yo gpsd@rkidder.com!
>
> On Fri, 22 Apr 2022 11:50:49 -0400
> gpsd@rkidder.com wrote:
>
> > I'm having trouble getting PPS from a u-blox 7 device.
> Yeah, you will.  Those need an outdoor antenna with a good sky view.
>
> You mention nothing of how your PPS is connected to your host.  As
> a HAT, PCI, USB, RS-232?
>
> You mention nothing of your host: PC, Raspberry Pi, Apple Mac, etc.
> That, and the OD on it, matters.

It is connected via USB and is outside, with a clear view of the 
southern sky. It's running gpsd 3.22 on an x86 PC with a 3D fix.

> since most people don't realize what info we need to help, run this
> script, as root, and send back here the restuls:
>
>      https://gpsd.io/gpsd-time-service-howto.html
What script?

> > When I run gpsmon, the value for PPS is simply N/A. I've also tried
> > using ppscheck, which doesn't return any results.
> I guess you did not read the Time Service HOWTO:
>
>      https://gpsd.io/gpsd-time-service-howto.html
>
> No point even starting gpsd until ppscheck works for you.
>
> > I do get a good
> > sync to six satellites.
> I would hardly call 6 "good".  Do you have a 3D Fix?
>
> > I get UBX-ACK-ACK when I try "ubxtool -e PPS" and/or "ubxtool -e
> > TIM-TP" so it looks like the unit should support PPS. Additionally, I
> > can see the device /dev/pps0 is created and lsmod shows both
> > pps_ldisc and pps_core are loaded. It certainly appears that I should
> > be getting PPS data.
> Ma y fact not in evidence, see above.
>
> > I'm running Debian Buster with stock kernel 4.19.0-20-686-pae on x86
> > hardware.
> 4.19?  Really?  Ouch.
>
> But more important, what version gpsd, etc.
>
> RGDS
> GARY
> ---------------------------------------------------------------------------
> Gary E. Miller Rellim 109 NW Wilmington Ave., Suite E, Bend, OR 97703
>         gem@rellim.com  Tel:+1 541 382 8588
>
>             Veritas liberabit vos. -- Quid est veritas?
>      "If you can't measure it, you can't improve it." - Lord Kelvin