Print

[N4SRN]

I’m looking for an EZ Guide to understanding APRS Raw Packets such as seen on APRS.FI raw display options. “EZ” as a write up addressing such a topic rather than referring me to the specification. A Primer, so to speak, for the less technical folks not inclined to get a EE/ComSci double major.  ;-)

Bret/N4SRN

[W4KYR]

I’m looking for an EZ Guide to understanding APRS Raw Packets such as seen on APRS.FI raw display options. “EZ” as a write up addressing such a topic rather than referring me to the specification. A Primer, so to speak, for the less technical folks not inclined to get a EE/ComSci double major.  ;-)

Bret/N4SRN

Let me add another question to go with your question. Is it possible use "Wireshark" to analyze APRS and Packet Radio Packets? If so, how?

[VE7KNL]

This might help
http://www.aprs.net/vm/DOS/PROTOCOL.HTM

[WD9EWK]

This might help
http://www.aprs.net/vm/DOS/PROTOCOL.HTM

In addition to this, the aprs.fi site provides a way to decode the raw packets. When you are looking at the raw packets for a station, you will see a drop-down menu that should have "Normal". Change that to "Decoded", and then you see both the raw packet and a breakdown of most of the data in the packet. Here's an example showing position packets and a message...



73!

[N4SRN]

Excellent stuff y’all - thanks!

[KB3VWG]

Let me add another question to go with your question. Is it possible use "Wireshark" to analyze APRS and Packet Radio Packets? If so, how?

Yes!

I simply ran Wireshark on the interface that was speaking AX.25. You can also collect pcap files via tcpdump to be read in Wireshark.

Also, a guide on the raw packets: https://www.tapr.org/pub_ax25.html - that is the specification of the protocol.


73,

KB3VWG

[W4KYR]

Let me add another question to go with your question. Is it possible use "Wireshark" to analyze APRS and Packet Radio Packets? If so, how?

Yes!

I simply ran Wireshark on the interface that was speaking AX.25. You can also collect pcap files via tcpdump to be read in Wireshark.

Also, a guide on the raw packets: https://www.tapr.org/pub_ax25.html - that is the specification of the protocol.


73,

KB3VWG

Thanks