Open source speech codec designed for communications quality speech between 700 and 3200 bit/s. The main application is low bandwidth HF/VHF digital radio.

Turn any HF radio into a Reticulum-capable transceiver using FreeDV data modes

DDC/DUC amateur radio transceiver

Saturn SDR Radio: Xilinx FPGA and Raspberry Pi 4 CM

Instructions for building a voice radio encryption module and a description of how it works

Передача и прием голоса через модем LoRa на базе платы LILYGO®TTGO LoRa32

A free, open-source, multi-platform application for sending files and messages, using the codec2 HF modems

A FreeDV device based on the ESP32.

ESP32 based Codec2/OPUS DV hobby UHF 3d printed handheld transceiver aka walkie-talkie