Embedded Firmware for Radio Control Systems
4.9k 2026-04-18

ExpressLRS/ExpressLRS

ExpressLRS is an open-source, high-performance radio control link firmware designed for RC applications, offering superior range and ultra-low latency.

Core Features

Up to 1000 Hz packet rate for responsive control
Integrated telemetry with Betaflight Lua compatibility
Convenient Wi-Fi firmware updates
Supports 2.4 GHz, 900 MHz, and dual-band RC links
Compatibility with multiple receiver protocols (CRSF, SBUS, MAVLink, etc.)

Detailed Introduction

ExpressLRS is a leading open-source radio link solution for Radio Control (RC) applications, particularly optimized for FPV racing. It leverages Semtech SX127x/SX1280 LoRa hardware combined with Espressif or STM32 processors. Through a highly optimized over-the-air packet structure, ExpressLRS achieves best-in-class range and ultra-low latency. It supports both 900 MHz and 2.4 GHz bands, offering packet rates up to 1000 Hz on compatible systems like EdgeTX. With a wide array of supported hardware from various manufacturers, it provides a versatile, high-performance, and community-driven platform for RC enthusiasts.

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