Opentx 2.1.9 Download !!exclusive!! May 2026

OpenTX 2.1.9, released in September 2016, is a significant stable version of the open-source firmware for RC radio transmitters. It is particularly notable as the last version to support AVR-based radios like the Turnigy 9X and 9XR. Download Links

Backup Existing Data: Always use the "Backup Radio to File" feature before flashing to ensure you can revert if necessary. opentx 2.1.9 download

You can download the OpenTX Companion 2.1.9 installer for your specific operating system directly from the official OpenTX 2.1.9 release page Companion 2.1.9 Installer OpenTX 2

https://downloads.open-tx.org/2.1/release/ Stay on 2

• Stay on 2.1.9 if: You have a massive library of models already set up, you are using older telemetry sensors, or you prefer the classic menu structure.
• Update to 2.3+ if: You are using newer hardware (like the X10 or X-Lite series), you need crossfire/elrs support improvements, or you want the modern "top bar" interface.

AVR Radios: This version is specifically recommended for older 8-bit radios (Atmega64/128) as later OpenTX branches (2.2+) focused on ARM-based hardware.