NTP with GPS/GNSS modules - for posting your settings

[pbe]

Hi,

since that there are so many GPS/GNSS modules out there, why not have a thread where anyone can post their setup and pfSense settings?

I'll kick off with mine:

On Amazon I got the LocoSys LU23030-V2 Dual-Band GNSS receiver - USB version.
I'm running pfSense 2.7.x in ProxMox and I've been able to get a reasonably accurate clock.
The only issue is that the NTP widget doesn't show how many satellites are in use, even though the puck does provide the data when testing with several other GPS NMEA software.
Below my current settings.

First, PfSense System tunables:

hw.usb.ucom.pps_mode = 2

This enables the option to use PPS on the DCD pin, which is connected in the internal UART of the GPS module. And yes, you'll see the PPS processing disabled in the settings below which I use now. Over time I'll experiment some more.

The Serial GPS settings:

GPS Type= custom
Serial port= depends on the VM or device.
Serial port speed= 115200 (its the default of this LOCOSYS puck)
NMEA Sentences= ALL
fudge1= 0.0021
fudge2= 0.0620
Min. poll= 8 seconds (3)
Max. poll= 32 seconds (5)
Prefer this clock     X
Do not use this clock -
Enable PPS processing -
Enable falling        X
Enable kernel PPS dis X
Obscure location      -
Log subsecond         -
Display extended GPS  X

GPS initialisation strings:

$PAIR512*3C
$PAIR753,1*26
$PAIR755,1,1*3D
$PAIR080,4*2A
$PAIR050,100*22
$PAIR006*3C

The result so far:

[elvisimprsntr]

Congratulations on your efforts.

I went a different route to eliminate any USB and virtualization delays/errors.

https://github.com/elvisimprsntr/pfsense-ntp-gps