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[aprssig] TNC2 Data Format

John Wiseman john.wiseman at cantab.net
Thu Jan 3 11:27:28 UTC 2013


Max,

For your application it probably doesn't matter, but generally using just
the 'normal' printable ascii set of 0x20 to 0x7e causes problems with MIC-E
format packets (as I found the hard way!).

73, John G8BPQ

-----Original Message-----
From: aprssig-bounces at tapr.org [mailto:aprssig-bounces at tapr.org] On Behalf
Of Steve Noskowicz
Sent: 03 January 2013 05:21
To: TAPR APRS Mailing List
Subject: Re: [aprssig] TNC2 Data Format


If there happens to be any diferences, perhaps G8BPQ has seen them:

http://www.cantab.net/users/john.wiseman/Documents/BPQ%20TNC2%20Emulator.htm



73, Steve, K9DCI 

--- Scott Miller wrote:

> Yes, it's just text.  I'm not
> sure that it's documented anywhere - when I wrote that code for the 
> OpenTracker series I just took a TNC2 clone and a
> KPC-3 off the shelf and examined what they put out.
> 
> For your purposes, it should be enough to do
> SOURCE>DESTINATION,PATH:PACKET.  I'd expect any APRS
> application to parse that correctly.
> 
> Scott
> N1VG
> 
> On 1/2/2013 8:08 PM, Max Harper wrote:
> > Is the TNC2 format just plain text, or is some of the
> data outside the
> > normal ascii text range? I'm trying to get weather data
> into APRX but it
> > doesn't support weather stations directly. So I'm
> thinking about
> > programing a Pic chip to take my weather data and send
> it to APRX as if
> > it was being received by a tnc. Problem is I can't find
> the TNC2 data
> > format.
> > Thanks, Max KG4PID
> > 
> > 
> > _______________________________________________
> > aprssig mailing list
> > aprssig at tapr.org
> > https://www.tapr.org/cgi-bin/mailman/listinfo/aprssig
> > 
> 
> _______________________________________________
> aprssig mailing list
> aprssig at tapr.org
> https://www.tapr.org/cgi-bin/mailman/listinfo/aprssig
> 

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