PACKET RADIO USING RASPBERRY PI
Raspberry Pi (3 or 4) using only Raspberry-Pi-OS-Bullseye and Linpac
By Bill Warthman - (K8WJW) - November, 2024

You will need to install "Build-a-Pi" by KM4ACK using 73Linux
Using this link, download the 32 bit:
"Raspberry Pi OS (Legacy) with desktop and recommended software".

This Download is a WinRAR ".XZ" compressed archive, which will require 7-Zip, winRAR, WinZip, PeaZip, etc.  Once unpacked, you may find it more convenient to install the uncompressed image on your SD card using Etcher Image Flasher.

There are videos included that you will want to view in order help you configure and understand Build-a-Pi. Build-a-Pi has a lot of amateur radio programs that you can install if you want to, but for packet radio these are what I installed:

Included with Build-a-Pi:

If you want to transmit beacons, See these Instructions

Additional separate elements, not included in Build-a-Pi:

Use this link for a video on how to install LinPac. When you get to the "./configure" command in the video you will need to use the following command:

./configure --build=x86_64-unknown-linux-gnu

Just follow the rest on the video to finish the installation.


↑ Complete packet station.
Radio and Raspberry Pi 4 and Radio Interface.


↑ Radio Interface top left corner radio audio in and out and PTT .
Top right corner audio in and out to USB sound card .
Bottom left PTT circuit - Wiring Schematics


↑ The USB sound card dongle is just a basic dongle I got from Amazon.