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

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)

This is the Xastir APRS client repository.

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

A SIGINT Go-kit of sorts

K3NG Arduino Amateur Radio Rotator Controller

Audio streaming application for Amateur Radio purposes

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

Amateur radio logbook software

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.

Not1MM != N1MM, An amateur radio contest logger for Linux.