# OpenRTX — Open-Source Firmware for SA868 Two-Way Radios

> Open-source firmware replacing the proprietary SA868 radio module code on the T-TWR, enabling the M17 digital voice protocol — a modern, royalty-free digital voice standard for amateur radio.

## Details

- **Difficulty:** advanced
- **Project Type:** build
- **Board Types:** ESP32-S3
- **Devices:** lilygo-t-twr, lilygo-t-twr-plus
- **Firmware:** PlatformIO, ESP-IDF, OpenRTX
- **Use Cases:** Ham Radio, Audio Projects, Portable Device
- **Links:** Github Url: https://github.com/OpenRTX/sa8x8-fw

## Tags

`openrtx`, `m17`, `digital-voice`, `sa868`, `amateur-radio`, `ham`, `vhf`, `uhf`, `codec2`, `t-twr`

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