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

Brian B. Riley brianbr at mac.com
Sat Mar 17 10:04:17 EDT 2007

You guys are behind the times ... Wes Johnston did this with a Basic  
Stamp and the serial line 3-4 years ago. The problem with it is that  
if TT or OT  decides to 'squawk' when you are in the middle of doing  
ANYTHING (lists, message input) you lose it and it winds up back at  
the standard display. This could however work by adding a pushbutton  
on the Stamp box, the pushing of which says "for the next 90 seconds  
don't do anything" ... just a thought. By the way instead of a $50  
BS2, it could be done with a $3.50 PICAXE 08M, there's a 'trick' to  
getting 9600 baud serial out, but it works and is reliable.

cheers ... 73 de brian  riley,  n1bq , underhill center, vermont
   <http://web.mac.com/brianbr/>  Tech Blog
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On Mar 7, 2007, at 6:24 PM, Alex Carver wrote:

> 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
> parameters.
>> 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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