codec2

A simple mesh network communications app powered by the Reticulum Network Stack.

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)

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

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

Codec2 low bit rate audio codec Arduino library for ESP32

Arduino Micro LoRA/FSK USB KISS modem (for Linux AX.25, APRSDroid, Codec2Talkie) or standalone APRS AX.25 micro digirepeater

Python's interface to codec 2

Wireless Codec2 compressed audio transport over ESPNow using ESP32 micro controller.

The Codec 2 speech codec, compiled to WASM using Emscripten.

Rowetel Codec 2 for iOS

Open source speech codec designed for communications quality speech between 450 and 3200 bit/s. The main application is low bandwidth HF/VHF digital radio.

Digital HAM radio library based on code from DroidStar

Android app to record and playback voice (450 to 3200bps), based on the highly effective Codec2 library

Offline LoRa map-messenger toy for kids — runs on the M5Stack Cardputer ADV + LoRa (SX1262) Cap with GPS. Friends on a map, GPS navigation (arrow/distance/altitude), text & voice messages, markers and route recording. Peer-to-peer, no phone, SIM or internet.

Codec 2 over LoRa

Hide digital data inside speech-shaped audio that survives Zoom, Discord, WhatsApp, and cellular voice. Reproducible Pareto curve of six trained codecs spanning 76 bps (cellular) to 3196 bps (Zoom-class) with listenable demos.

A GUI in Qt for recording speech using Codec2

voice-over-FSK walkie-talkie on ESP32-S3 + SX1262. Codec2 3200, 19.2 kbps FSK.

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