Gps receiver & ntp



  • I am currently moving from Smoothwall (used for many years) to PFSense.  Doing some different stuff with PFSense with multiple WAN and LAN connections such that I built a new box with 6 NICs on it.  Its on its own dedicated hardware box right now.

    The above said.  I have been using an NTP server with a GPS for a few years now.  I would like to shut that box down and attach the GPS to the PFSense server.

    Over the years have used a variety of GPS hardware devices all serially connected.  First one was just mounting a GPS antenna outside and a serial receiver inside (old surplus vehicle one).  I then went to the Sure Electronics one (which did OK until it burned up one day) and currently using an older style GPS with a serial connection on it mounted in the attic with a serial wire run some 3 floors into the basement.

    Concurrently I am into weather and amateur radio such that I am adding an APRS Station to my setup and playing around a bit with doing direct satellite weather map downloads from NOAA satellites.

    Serially right now this is what I see on my NTP box running my some 100 foot serial cable to the comm closet.

    $GPGGA,095747.03,4134.4423,N,08800.6293,W,1,08,0.9,00222,M,,,,36
    $GPRMC,095747.03,A,4134.4423,N,08800.6293,W,00.0,000.0,220813,02.,W
    66
    $GPGSA,A,3,25,01,32,31,23,14,16,29,,,,,1.5,0.9,1.231
    $GPGSV,3,1,10,31,70,029,49,32,62,276,47,14,37,095,44,20,35,304,36
    77
    $GPGSV,3,2,10,25,23,044,36,16,20,184,38,01,13,257,41,23,10,295,3674
    $GPGSV,3,3,10,29,06,082,42,22,04,156,,,,,,,,,7F
    $GPGLL,4134.4423,N,08800.6293,W,095748.719,A
    23
    $GPGGA,095748.72,4134.4423,N,08800.6293,W,1,09,0.8,00221,M,,,,3C
    $GPRMC,095748.72,A,4134.4423,N,08800.6293,W,00.0,000.0,220813,02.,W
    6F
    $GPGSA,A,3,25,01,32,31,23,20,14,16,29,,,,1.5,0.8,1.2
    32
    $GPGSV,3,1,10,31,70,029,49,32,62,276,47,14,37,095,45,20,35,304,3676
    $GPGSV,3,2,10,25,23,044,36,16,20,184,38,01,13,257,41,23,10,295,38
    7A
    $GPGSV,3,3,10,29,06,082,41,22,04,156,,,,,,,,,7C
    $GPGLL,4134.4423,N,08800.6293,W,095751.563,A
    24
    $GPGGA,095751.56,4134.4423,N,08800.6293,W,1,09,0.8,00223,M,,,,30
    $GPRMC,095751.56,A,4134.4423,N,08800.6293,W,00.0,000.0,220813,02.,W
    61
    $GPGSA,A,3,25,01,32,31,23,20,14,16,29,,,,1.5,0.8,1.232
    $GPGSV,3,1,10,31,70,029,49,32,62,276,47,14,37,095,45,20,35,304,36
    76
    $GPGSV,3,2,10,25,23,044,36,16,20,184,38,01,13,257,41,23,10,295,36*74
    $GPGSV,3,3,10,29,06,082,41,22,04,156,,,,,,,,,7C
    $GPGLL,4134.4423,N,08800.6293,W,095752.875,A
    2D
    $GPGGA,095752.88,4134.4423,N,08800.6293,W,1,08,0.9,00222,M,,,,31
    $GPRMC,095752.88,A,4134.4423,N,08800.6293,W,00.0,000.0,220813,02.,W
    61

    I am documenting my PFSense build on an automation forum; going really slow with it.  That said is there a step by step anywhere here on the forum or wiki such that I can add my hardware GPS to the PFSense NTP server?

    Here is where I am posting my PFSense build:

    http://cocoontech.com/forums/blog/29/entry-415-from-anyone-using-pfsense-as-a-firewall/


  • Rebel Alliance Developer Netgate

    To enable GPS on pfSense 2.1 it's just a matter of going to Services > NTP, and selecting the serial port on which the GPS sits. Nothing else to it, no knobs or anything.



  • How is this installed?

    Thanks,

    Rick



  • Very knowledgeable and very interesting.


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