[aprssig] APRS Telemetry Question

[Steve Noskowicz]

  I'll be more explicit.  My intent was not to argue the spec, but simply to point out that unfortunately, an answer of "read the 101 spec" doesn't answer all questions (read: 'specify the protocol') fully, so follow up questions are to be expected.  

  It also "says" the Telemetry starts with a "T" when, from comments here, it must start with "T#".  

  The answers did get me a better understanding of what I wanted that was difficult to get from the spec alone and I thank the responders for that.

  In addition, since my local digi is somehow crippled, it is difficult getting real off-air packets right now.  This level is not where I spent most of my time gaining an understanding of APRS.


73, Steve, K9DCI  USN (Vet)  MOT (Ret)  Ham (Yet)


--- On Sun, 10/14/12, Jason KG4WSV <kg4wsv at gmail.com> wrote:
> Steve Noskowicz <noskosteve at yahoo.com> wrote:
> >> ... Every single character ... is part of the
> specification,
> >
> >   Not quite, as I pointed out.
> 
> If you note the field length it says 5.  Not 2-5, 0-5,
> etc (as it does
> in other places for variable length fields).  This is
> clearly a
> fixed-width field, the T, #, 3 digits, and the comma are
> required.
> 
> Even if some parsers accept mal-formed packets, the spec is
> pretty
> clear in this area, IMO.
> 
> -Jason
> kg4wsv