[aprssig] Doubling APRS messaging in ham radio overnight

Scott Miller scott at opentrac.org
Sun Jan 25 19:15:52 EST 2009

Can someone define EXACTLY what this gadget needs to do?  I've already 
got DTMF decoder code written for the HCS08, I'm just not clear what 
needs to be done.  This is a duplex device that sends and receives DTMF 
on one channel and sends and receives APRS messages on another?


Chuck Gooden wrote:
> If someone where to google "DTMF pic" there seems to be a lot of code 
> and circuits already developed that would decode the DTMF tones using 
> pic.  There maybe some for the 6800 too but I didn't google that.  Using 
> one of these circuits one would only need to add the paging text 
> converter.  It should be a fairly simple task for someone that wants to 
> learn about pics and finance a portion of their hobby, or write an 
> article for QST.   I am interested, but too busy at this time and have 
> not worked with pic at all yet but do write software.
>> What we really need is someone to take on the simple task of a
>> PIC converter to convert APRS messages to DTMF PAGING text
>> messages so that those dozens of THOUSANDS of existing amateur
>> radio DTMF paging HT's can be used to receive and send APRS
>> messages.  
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