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APRS
in New South Wales |
| Configuring
a TNC for mobile use |
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Even if you don't have one of the funky APRS mobile radios, and don't have a TinyTrak kit, you can still send your position from a mobile station using a standard TNC setup. This page details how to use a few common TNC models as mobile trackers. Most of the later firmware releases for these TNC's support APRS parameters. All you need to do is to connect your GPS to the TNC (refer to the TNC manual) and configure the parameters as shown in the tables below. Kantronics KPC-3 and KPC-3+ (For KPC-3, connect GPS data to Pin 2, GPS Ground
to Pin 7 of TNC DB-25 terminal connector)
If you have a KPC-3 Plus with 8.3 or 9.0 firmware, input the GPS data to the KPC-3 Plus DE-9 pins 2 and 6 (data and ground, respectively). This frees up the DB-25 port, so if you want to run it as a tracker, you can, and if you want to run APRS mobile with a laptop, just plug in the computer cable and go. No other changes are necessary. Additionally, make these settings in the KPC-3 Plus (8.3 or 9.0 only):
Paccomm Tiny-2 Firmware releases after version 3 support APRS and GPS commands. Refer to your manual for details, however parameters should be set as per the KPC3 example above.
SYMBOLS *Check the latest SYMBOLS.TXT file to find the XYZ code for the symbol you want to set. To get the desired symbol, place it in the TO CALL of the LTP line, e.g. LTP 1 GPSxyz via WIDE1-1,WIDE2-1 where "xyz" is derived from the symbols file. Most common symbols: GPSMV = Car
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