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[aprssig] APRS to NMEA

scott at opentrac.org scott at opentrac.org
Tue Sep 19 14:30:11 UTC 2006


Oh, I see.  I think I'll add that to my to-do list - it's crossed my mind
before.  I can just have it generate output for a specified callsign.

As for tricking the program into thinking the tracker is a GPS receiver, one
thing I'm working on now is having the T2 save all incoming positions, and
then having it dump them out to the serial port when it gets a Garmin 'send
waypoint database' command.  That way non-APRS programs can get position
data, with a little bit of manual intervention.  Might let you do drop-in
APRS in a SAR command post with no other APRS capability, for example.

Scott
N1VG 

> -----Original Message-----
> From: aprssig-bounces at lists.tapr.org 
> [mailto:aprssig-bounces at lists.tapr.org] On Behalf Of Curt, WE7U
> Sent: Tuesday, September 19, 2006 7:07 AM
> To: TAPR APRS Mailing List
> Subject: RE: [aprssig] APRS to NMEA
> 
> On Tue, 19 Sep 2006 scott at opentrac.org wrote:
> 
> > I think the Anti-Tracker project is dead, but the Kenwood 
> D7 and D700 do
> > that.  And of course my upcoming Tracker2 (plus Magellan and Garmin
> > protocols), but it's not quite done yet.
> 
> Well, not quite...  (BTW:  Xastir does the waypoint/anti-tracker
> thing too):
> 
> Andrew was asking if anything converts back to NMEA so that mapping
> programs can be tricked into thinking it's APRS data, not just
> produce waypoints on the map like the other solutions above will all
> do.
> 
> In order to do this properly, you'd either need to have a very slow
> incoming data rate on APRS, or you'd have to select one
> callsign-SSID from the incoming packets and produce either a GPGGA
> or a GPRMC string (or both) from the data, then dump it to a serial
> port or a simulated serial port.
> 
> It'd be relatively easy to do it with Perl and a /dev/pty port.
> 
> --
> Curt, WE7U.   APRS Client Comparisons: http://www.eskimo.com/~archer
> "Lotto:    A tax on people who are bad at math." -- unknown
> "Windows:  Microsoft's tax on computer illiterates." -- WE7U
> "The world DOES revolve around me:  I picked the coordinate system!"
> 
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