[aprssig] D7's,D700's and TinyTrak

Alex Carver agcme2002 at yahoo.com
Wed Mar 7 18:24:54 EST 2007

You don't even need to interface to the buttons on the
display.  Remember that the D7 and D700 respond to
serial port commands even while in APRS mode.  You
just have to issue BCON 0\n BCON 1\n over the serial
port and the radio will beacon.  You can also change
the beacon rate via the serial port too which gives
you the smart beaconing rate.

I had planned on doing this with a microcontroller
piggy-backed on the serial port and listening to the
GPS feed directly.  A Y-cable would split the GPS data
between this microcontroller and the radio.  I also
thought about having a pass-through serial port so the
microcontroller could be left on the radio and still
allow a computer to be connected.  But that's a little
more work than just tracking and adjusting the radio's

> Message: 4
> Date: Tue, 6 Mar 2007 12:46:38 -0800 (PST)
> From: Steve Noskowicz <noskosteve at yahoo.com>
> Subject: [aprssig] D7's,D700's and TinyTrak
> (Rod,VE1BSK)
> To: aprssig at lists.tapr.org
> Message-ID:
> <922611.52700.qm at web35315.mail.mud.yahoo.com>
> Content-Type: text/plain; charset=iso-8859-1
> Rod,
>     Where there's a will...
>     Another idea FWIW.  Would probably require an
> additional 555 timer, but...
>      The top row of buttons on the D700 Mic are
> hardware inputs to the radio.   I use the one set
> to BCON to force a skwawk when I want.  The radio
> skwawks when BCON is first turned on.  The TT
> could be interfaced there also.   The correct
> resistor value is needed.
>  Set one of these mic buttons to the BCON function (
> I don't recall if that is one of the defaults
> or a custom setting) , then have the TT turn on BCON
> when it needs to skwawk -- then shortly
> after, turn it off (the 555's job).
> 73, Steve, K9DCI

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