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

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

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

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.

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.

Digital HAM radio library based on code from DroidStar

Experimental Meshtastic-Android research fork: offline 24kHz Neural Audio (WavTokenizer @ 900bps), Selective-Repeat ARQ, and Tactical Half-Duplex Live PTT over stock LoRa firmware.

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

Meshtastic users hate this one weird trick. Voice-over-FSK walkie-talkie on ESP32-S3 + SX1262. Codec2 3200, 19.2 kbps FSK. Operated with the utmost respect for the RF spectrum.

无网络野外沟通：手机之间只靠 BLE 自组多跳 Mesh，传文本、快捷符号、小图片、Codec2 条式语音、定位与 SOS、连续轨迹记录包。无服务器、无账号、全程离线。Android · Kotlin · Compose · WLP/1 协议

Unofficial LineageOS 24.0 / Android 17 device tree for the iKKO MindOne (MediaTek MT6789 / Helio G99) — own AIDL audio, sensors, GNSS and camera services, in-tree V4L2 Codec2, 64-bit only. lineage-23.2 branch for Android 16

RK3588 播放、显示与游戏图形的可回退升级：Codec2/MPP、AFBC、十位 HDR、帧率匹配/QMS、Mali GPU/KMD/CSF 与播放器修复。Firmware-pinned Android 12 modules with per-feature rollback.