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ExpressLRS

  • Software
  • Drones and boats
  • Firmware

ExpressLRS is an open source radio control link built on Semtech SX127x/SX1280 LoRa hardware with an Espressif or STM32 processor, aimed at FPV racing.

Source on GitHub: github.com/ExpressLRS/ExpressLRS (opens in a new tab). Facts read at commit dd96654 (opens in a new tab).

Licenses

Code
GPL-3.0-only (opens in a new tab)

Read by Robotheca from LICENSE (opens in a new tab) (GPL-3.0-only) at commit dd96654 (opens in a new tab), on 16 Oct 2026.

Commercial use
Yes

Copyleft: Modified source must be published.

What it does

  • Offers low-latency, long-range RC links on 900 MHz (up to 200 Hz packet rate) and 2.4 GHz (up to 1000 Hz on EdgeTX).
  • Supports telemetry with Betaflight Lua compatibility, WiFi updates, and Bluetooth or WiFi sim joystick.
  • Supports receiver protocols including CRSF, SBUS, SUMD, HoTT and Scorpion telemetry, MAVLink, and PWM.
  • Lets users adjust VTX and VRX frequencies from the Lua script, including SmartAudio and Tramp support.
  • Uses bind phrases instead of button binding and works with OLED and TFT displays.
  • Hundreds of hardware targets from many manufacturers are supported; the ExpressLRS Configurator lists the tested ones.

Written by Robotheca from the project's README (opens in a new tab) at commit dd96654.

Getting started

Difficulty
Intermediate
Hardware it needs, as the project states it
Hardware based on Semtech SX127x or SX1280 LoRa radios with an Espressif or STM32 processor; hundreds of targets from many manufacturers, with the tested ones listed in the ExpressLRS Configurator.

Maintenance

Status
Active: a commit in the last 90 days
Newest commit
11 Oct 2026 on master
Latest release
ExpressLRS 4.1.0 (17 Jul 2026)

Checked on GitHub on 16 Oct 2026.

Links

Robots on Robotheca that use it

No robot on Robotheca is linked to it yet. Links come from a robot's robot.yaml, from its dependency files read as text, or from Robotheca's editors.

Robotheca lists software as a reference: nothing is hosted or run here, and every fact links to where it was read.