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[aprssig] Tomtom's For APRS (Question)

Jason Rausch jason at ke4nyv.com
Mon Apr 2 04:33:24 UTC 2012


> Even very basic early GPS units with displays and serial
> interfaces, such as the original Garmin eTrex and my
> Foretrex could do this waypoint display.

Go even earlier to the Garmin GPS 38, 40 and similar units.  They didn't have a map, but they did have what I called the "plot screen".  Any waypoints saved or sent to the unit by the Kenwood D7/700 (also HamHUD, OpenTracker 1+, Ozi Anti-Tracker, I could go on and on) would be shown on this map plot screen so you could at least get an idea of where station were in relation to you and each other.

We actually borrowed this plot screen idea when we added it to the YagTracker (http://www.rpc-electronics.com/datasheets/rpc/yagtracker-manualv1_44reva.pdf).  The YagTracker really isn't capable of a full mapping system on-screen, but the plot screen, with the addition of range rings has made it a very useful tool for the mobile APRS user.  Oh and the YagTracker support $GPWPL waypoint strings as well!

Jason Rausch - KE4NYV
RPC Electronics, LLC
www.rpc-electroncis.com


--- On Mon, 4/2/12, Stephen H. Smith <wa8lmf2 at aol.com> wrote:

> From: Stephen H. Smith <wa8lmf2 at aol.com>
> Subject: Re: [aprssig] Tomtom's For APRS (Question)
> To: "TAPR APRS Mailing List" <aprssig at tapr.org>
> Date: Monday, April 2, 2012, 12:14 AM
> On 4/1/2012 11:58 PM, Lawrence
> LaBranche wrote:
> > The AvMap G6 can do bi-directional communication on the
> mini-jack port. I would think it communicates with the TNC
> of the radio to do this.
> > 
> > KI6ZQY
> > 
> > Sent from my iPod
> > 
> > O
> 
> 
> This is bi-directional  *GPS*   comms --
> not the main interface port.
> 
> Even the earlier  D700 & TH-7 could reformat
> received posits as generic NMEA waypoints and send them TO
> the GPS on the reverse side of the GPS/radio RS-232 serial
> connection.   You enabled the waypoints in
> one of the Kenwood APRS menus.
> 
> Even very basic early GPS units with displays and serial
> interfaces, such as the original Garmin eTrex and my
> Foretrex could do this waypoint display.    See
> this page on my website (or the pic below) for a
> screenshot  of waypoints from a TH-D7 displayed on a
> Foretrex via the GPS port.
> 
> . <http://wa8lmf.net/ForeTrex/ForeTrexScreens.htm>   Scroll
> to the bottom picture.
> 
> The D72 merely continues this convention.,  and the
> AVmap further enhances it by displaying actual APRS symbols
> instead of generic GPS waypoint symbols like flags, fish and
> campsites.
> 
> Again, the physical serial port on the TH-D72 is only a
> bi-directional NMEA GPS interface. It DOES NOT give you
> access to the TNC or radio memories.
> 
> 
> 
> 
> 
> -------------------------------------------------------------------------------
> 
> --
> 
> Stephen H. Smith    wa8lmf (at) aol.com
> Skype:        WA8LMF
> Home Page:          http://wa8lmf.net
> 
> *****  NEW   Precision Mapping 9 For
> UIview Released! *****
>    http://wa8lmf.net/aprs/PMap9_Notes.htm
> 
> 
>  Vista & Win7 Install Issues for UI-View and Precision
> Mapping
>     http://wa8lmf.net/aprs/UIview_Notes.htm#VistaWin7
> 
> 30-meter HF APRS over PSK63
>    http://wa8lmf.net/APRS_PSK63/index.htm
> 
> "APRS 101"  Explanation of APRS Path Selection &
> Digipeating
>   http://wa8lmf.net/DigiPaths
> 
> 
> 
> 
> _______________________________________________
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> 



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