This is the Xastir APRS client repository.

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.

A lightweight APRS tracker for balloons

All HF bands QRP CW/SSB transceiver

VP-Digi - a functional, cheap, easy to assemble and configure STM32-based APRS digipeater controller with built-in KISS modem.

HAL-based Si5351 driver for STM32

All-in-one open-source utility for SDR-based satellite tracking. All you need to establish your own ground station with your equipment.

QuanSheng UV-K5/K6/UV-5R Plus Custom Firmware Merge from: ▪ @OneOfEleven and ▪ @fagci Mod w. Spectrum Analyzer ▪ by @egzumer ▪ Enhanced by @RE3CON: Full freq range of BK4819 for TX and RX: 14MHz ~ 630MHz and 760MHz ~ 1879 MHz "ENABLE_TX_UNLOCK". 2nd ToneBurst 1750Hz and 1050Hz = PTT + Sidekey 1, PTT + Sidekey 2.

Open Source EchoLink Proxy

Manually submit weather station information to the APRS-IS network.

A standalone FT8 transceiver based on the Raspberry Pi Pico microcontroller by Godwin Duan, AA1GD.

PIC16F886 based CW auto key controller with USB support

Si5351 based WSPR beacon

ATTiny13/25/45/85: "An Ultra Simple Iambic Keyer with Speed Pot" !

Terminal Node Controller and APRS Tracker Project

C#, .NET Standard based ham radio CAT/CIV control library.

All HF bands QRP CW transceiver

Rigsync keeps multiple rigs' frequency and mode in sync using Hamlib

QRP CW Transceiver