CubeSatSim, the AMSAT CubeSat Simulator

MeshTNC is a tool for turning consumer grade LoRa radios into KISS TNC compatible packet radio modems

Embedded firmware for ham radio transceivers

Walki Talkie 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 ~ 665MHz and 745MHz ~ 1899MHz. 2nd ToneBurst 1050Hz and 1750Hz = PTT + Sidekey 1, PTT + Sidekey 2. Build with CGI 11.3.Rel1 saves some space

SDR App for OpenHPSDR protocol 1 & 2 (macOS and Linux)

A modem/TNC to generate the AFSK audio tones for sending APRS messages using a Raspberry Pi Pico/Pico2

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

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.

Codec2 low bit rate audio codec Arduino library for ESP32

Radio control software

ESP32 based remote CW keyer

AX.25 packet radio digipeater for linux

Modified sketch for TFT LCD 4" controller ILI9488

This LoRa APRS i-gate listens for both compressed APRS 434 packets and longer, legacy OE5BPA packets.

Generic AX.25 beacon packet generator library for APRS

Rotator Control Software

M5Stack CW Decoder

A tiny single-header, public domain FLEX encoder

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

ESP32s3 APRS beacon/tracker/logger, USB kiss TNC , USB audio FM tranceiver with Micropython shell