[aprssig] "station which heard" - PyMultimonAPRS igate seriously buggy!

Kristoff Bonne kristoff.bonne at skypro.be
Mon May 20 05:56:19 EDT 2013

Hallo Heikki,

Thank you for the reply and for troubleshooting this.

I have tried out PyMultimonAPRS because I was experimenting with the RTL 
dongle, SDR, gnuradio, etc.
It looked like a nice application to have.

I will forward this information to the "raspberry_pi_4-ham_radio" list 
on yahoo where the information on this project came from.

BTW. In this setup, it uses MultimonNG but I don't know the relationship 
between multimon and multimonNG.

kristoff - ON1ARF

On 20-05-13 10:14, Heikki Hannikainen wrote:
> Kristoff, I just noticed that the PyMultimonAPRS igate software is
> still seriously broken in another respect too: it is mangling packet
> contents too!
> For example, see this: http://aprs.fi/?c=raw&call=DK0CO
> Packets which went through DL1MX igate running PyMultimonAPRS are (1)
> missing the '*' character denoting used digipeaters, and (2) the
> ISO-8859-1 encoded 'ö' character, 0xF6 hex, is replaced by a '.'
> character. "APRS-Digi Osterode-Förste-Clubstation" becomes "APRS-Digi
> Osterode-F.rste-Clubstation" !  This will also seriously break Mic-E
> encoded position packets, which contain unprintable "binary" bytes.
> And it will also make the mangled packet *different* from the original
> packet, which will cause a *duplicate* copy to traverse parts of the
> network since it's different from the original.
> These are due to limitations in Multimon.
> I would strongly advice you and everyone else to not use
> PyMultimonAPRS at all until these bugs are fixed. Thanks!
> - Hessu
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> aprssig at tapr.org
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