[aprssig] Protocol parsing questions
jcwren at jcwren.com
Thu Nov 20 15:19:20 CST 2008
I'm getting back into APRS after a few years (oh, about 15, I think). I'm
in the process of writing a ground-up Java parser, as my eventual goal is to
run a native application on the Android G1 that uses it as a position
I've run across a few packets that I can't determine the contents of based
on the 1.0.1 and 1.1 specifications. For example, the packet below:
We have a 'g000' that says what the gust is. Then we have a 'gt41...' I
have no idea what that is. There's also the question of when to stop
parsing, and treat the remainder as a comment. In the 1.0.1 PDF file, a
number of the example weather packets are shown with 'wRSW'. 'w' should be
the software version, but it's not define in the list that follows. Is
there a known sigil for deciding the remainder of the packet are comments?
I also see a number of improperly formatted packets hitting aprs-is. Like
Note the incomplete speed field. What's the appropriate course of action?
Then there are these packets:
I'm guessing these might be a QSO or something, but I don't understand how
to programmatically identify them.
Can someone point me to some documentation i might be overlooking? Or
provide some insight from experience?
-------------- next part --------------
An HTML attachment was scrubbed...
More information about the aprssig