[aprssig] "no sym yet" icon + compressed packets? - FIXED on aprs.fi
hessu at hes.iki.fi
Sun Feb 16 01:14:08 EST 2014
On Sat, 15 Feb 2014, Steve Dimse wrote:
> this for a while, but it is like the bug I have with base91 weather.
> Every time I start to work on it I get a gigantic headache, so I have a
> beer. Then I stop caring about symbols and base-91 ;-)
I greatly appreciate this approach, but I'd already had quite a few pints
of good ales in London pubs this week, so I ended up adjusting the parser
code instead while waiting for the weather-delayed flight at Heathrow :)
On Sat, 15 Feb 2014, Paul Bramscher wrote:
> I worked the ISS again this evening, and when K0GDI worked me it sure
> appears that "1c" is missing in his packets for some reason (evidently
> from the hex view). I guess that breaks the code for icons, if not
> more. I guess we just won't get icons when that software/version reports.
Yes, you do, since yesterday evening aprs.fi gets the correct symbol
table identifier from packets which have had the non-printable 0x1C byte
Earlier I wrote:
> The aprs.fi code that translates that to text ("House (HF antenna)")
> seems to be a bit buggy, it probably should say something like "invalid symbol
> table or overlay code".
I fixed that bit, the hover-on text description of a symbol now says
"Unknown symbol" if the store symbol table identifier does not make sense.
> The APRS packet code at this end also needs a bit of improvement in the
> handling of mangled mic-e packets, I think it should be able to get the
> symbol table right, since it is present in the remaining packet data.
Fixed. It was collecting the symbol table identifier before putting in a
dummy byte in place of the 0x1F (or other non-printable char) eaten by
the broken K0GDI-6 igate.
The eaten binary character in this case contains course and speed
information. I also adjusted the code to not try to decode course or speed
if these bytes are missing, so now those keys are not shown for the
> The K0GDI-6 igate should also be fixed to not eat bytes out from mic-e
I'll leave it to the locals to kindly inquire K0GDI-6's owner if he could
reconfigure his igate to run the TNC in KISS mode and use a better igate
software, such as Lynn's APRSIS32.
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