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[aprssig] DTMF Text Messaging Gateway PIC

Robert Bruninga bruninga at usna.edu
Thu Feb 19 16:33:26 UTC 2009

It works!

The APRS=>DTMF Pic Processor Gateway works!
Please see: www.aprs.org/aprs-dtmf-gate.html 

Oh it is so great to be able to program again!  In just 3 hours
from the discovery that the Basic Stamp PIC has built-in DTMF
routines, I was sending APRS data for display on my TH-78.  As
you can see from the web page, I have defined ways to display
just about ALL local APRS data on these tiny DTMF display
windows on these radios.

Now to find out who in the club has these radios.

The BASIC code is very alpha, but it works!
I'll release it when it is to beta level.


> -----Original Message-----
> Sent: Wednesday, February 18, 2009 1:35 PM
> Subject: [aprssig] DTMF Text Messaging Gateway PIC
> Wow!
> Today I noticed that the Basic Stamp PIC 
> processor already contains a DTMF encoder!
> Gosh, All I have to do is connect its serial 
> port to a TNC and its audio to a TX, and I 
> have an instant, stand-alone APRS==> to
> Text Paging gateway!
> Anyone else have Basic Stamp PIC's and wanna play?
> Bob, WB4APR
>> -----Original Message-----
>> Sent: Tuesday, February 10, 2009 10:39 AM
>> DTMF Messaging works!
>> Took me a while, but I can now finally 
>> send DTMF messages manually from any radio 
>> and have them display on the FT11/41/51, 
>> TH78 series radios.  I have updated my docs:
>> www.aprs.org/FT51-TH78.html 
>> It needed the PAGE codes first to serve as 
>> a header to tell the radio who the message 
>> is coming from and who it is addressed to.
>> So the format is really:
>> #MMMMMM...#
>> Where TTT is the TO-ID, FFF is the FROM 
>> station ID and MMMM... Is the message.  
>> Each station's own TO-ID whould be his own
>> suffix.  For example, WB4APR is APR which 
>> becomes "277".  Then for APRS, we have 
>> defined 6 GROUP codes 994 through 999 for
>> and MESSAGES.  This way, the recepient can 
>> select or opt-out of any of these data groups.
>> So setting up one of these radios to receive 
>> messages requires:
>> 1) Putting in your own ID ###
>> 2) Putting in the six GROUP codes above
>> 3) Entering PAGE mode.
>> THen from any other radio, you can send 
>> messages manually to that radio.  To send 
>> your callsign, just put 996*FFF (where
>> FFF is your ID) into the DTMF memory of 
>> any DTMF radio and put any intended messages 
>> #MMMMMMMMMM# into additional memories.  For
>> example
>> "CALLME" is #2C2A5C5C6A3B#
>> "WB4APR" is #9A2B42A7A7B#
>> For troop number "995" with a score of "95" 
>> would be "995 95" or #9951C95#
>> It works!  Find out who in your club has 
>> these radios and put one at Net Control for 
>> your next operation.  Figure out ways to
>> use this.
>> Bob, Wb4APR

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