Software-defined radio receiver application built on GNU Radio with a web-based UI and plugins. In development, usable but incomplete. Compatible with RTL-SDR.

📡 An AX.25 packet radio chat protocol with support for digital signatures and binary compression. Like IRC over radio waves.

HamPi

Web based amateur radio logging application built using PHP & MySQL supports general station logging tasks from HF to Microwave with supporting applications to support CAT control.

K3NG Arduino CW Keyer

HamMessenger is a portable device that uses a ham radio and the APRS protocol as a medium to send and receive text messages.

Library for the Si5351 clock generator IC in the Arduino environment

This is the Xastir APRS client repository.

Turn your Android phone into Amateur Radio Codec2/OPUS APRS enabled DV handheld transceiver (Bluetooth/BLE/USB/TCPIP KISS/Sound modem client for DV digital voice communication)

LoRa ESP32 KISS Bluetooth modem (for APRSDroid or aprs.fi iOS) + APRS-IS RX/TX iGate over WiFi + Digipeater + DV (with Codec2 Walkie-Talkie)

TR-9 - M17 protocol compatible handheld - schematics, PCB design files, BOM.

A SIGINT Go-kit of sorts

K3NG Arduino Amateur Radio Rotator Controller

Audio streaming application for Amateur Radio purposes

Remotely open audio channels and a serial port to an Icom RS-BA1 server (for ex. Icom IC-705 transceiver).

M17 standard specification

Attach TNC devices as network interfaces

Custom firmware for Vaisala RS41 and Graw DFM-17 radiosondes with support for amateur radio use. Ideal for tracking high-altitude balloons. Supported modes include APRS, Horus 4FSK mode, CATS, morse code (CW) and additional digital modes like WSPR and FT8 via Si5351.

Amateur radio logbook software

Generate APRS Passcode 🔐 using PHP for use in Amateur Radio APRS Applications when connecting to the APRS-IS Network.