The Appalachian Trail Golden Packet event is an annual tradition started by WB4APR in 2009. The goal is to set up 15 temporary VHF/UHF APRS stations on mountain tops, along the Appalachian Trail, and

Here is an application that sends images over AX.25: Packet Compressed Sensing Imaging (PCSI) If part of the transmission gets lost there is just an overall degradation in image quality, not a missing

Trying to get PAT and Dire Wolf, to talk to each other, is a constant source of aggravation. AX.25 for Linux takes some effort to get working properly. The author of PAT was working on a way to make P

The long awaited Direwolf Software TNC release 1.6 has finally arrived. New Features include: FX.25 - Forward error correction (FEC) added in a way that is completely compatible with an ordinary AX.25

The RPi only has audio output. For audio input, you will need to add some sort of audio adapter. These documents should be useful in your quest. https://github.com/wb2osz/direwolf/blob/dev/doc/Raspber

#pi

In my experiments, I found that direwolf is significantly better than the TM-D710A internal TNC for decoding weak 9600 baud signals. Results here: https://github.com/wb2osz/direwolf/blob/master/doc/A-

> Direwolf is the only FX.25-aware TNC [as an emulator of TNCs] that I know about. > UZ7HO Soundmodem supports FEC and I've produced a Linux version. It does 300/600/1200/2400 FSK and a range of BFSK

The behavior of lxterminal has changed in the Raspbian Buster release. The solution is to use the development version ("dev" branch) of Dire Wolf rather than the 1.5 stable release. Note the extra lin

Books? Do they still make those? Here are a couple good places to get started. https://learn.adafruit.com/series/learn-linux-with-raspberry-pi https://learn.adafruit.com/series/learn-raspberry-pi Here

Packet Radio / APRS / Emergency Communications: The RPi can be used as a lower cost, higher performance, and more flexible replacement for the traditional Terminal Node Controller (TNC) from the 1980'

I have 2.0.0 GA running fine on a Raspberry Pi 3B. Could you be more specific about the exact errors you are seeing? I you give us the exact commands you used and the exact error messages, someone can

As others have mentioned, "Dire Wolf" is a replacement for the traditional specialized hardware TNC. Does this overview help to clarify how it all fits together? https://github.com/wb2osz/direwolf-pre

The Dire Wolf software TNC can send and receive DTMF. See block diagram here https://github.com/wb2osz/direwolf/tree/dev When the packet destination address is "DTMF" tones are sent rather than the us

You could run wireshark to observe all of the network communication.

KM6JNN wrote: > As to the PTT/VOX, I am using VOX to stay in a more general less idiosyncratic mode. > It seems that the tx delay here is so critical that a "1200bps AFSK + VOX" combo > simply fails t

sudo apt-get install x11-apps xclock -digital & TZ=UTC xclock -digital &

I like to support Adafruit whenever possible because they invest a lot of effort in providing interesting & useful educational material. Adafruit Learning System Adafruit Learning System LEARN HOME RA

You might find this useful for sending APRS telemetry with a Raspberry Pi. https://github.com/wb2osz/direwolf/raw/master/doc/APRS-Telemetry-Toolkit.pdf It describes scripts and methods to generate APR

Here is one possibility for APRS on the RPi: https://github.com/wb2osz/direwolf/tree/master/doc Start with the second document listed.

Fred asks about the VK-172 USB GPS, > I assume it has a RS232/USB adapter IC. If so, is it a Prolific or knock off? According to the Ublox 7 documentation, https://www.u-blox.com/sites/default/files/p