It introduced a completely overhauled telemetry system that became the industry benchmark for accuracy and sensor discovery.
: When moving from 2.0 to 2.1.9, Companion will convert your models. Always back up your models before clicking "Write" to avoid permanent data loss. 💡 Why stay on 2.1.9?
Released in , version 2.1.9 was the final, "polished" stable release of the 2.1 branch. For pilots using the FrSky Taranis or the classic Turnigy 9X , this version was the gold standard—it brought stability and essential telemetry improvements that made older radios feel modern. The "Ghost" in the Installer
Before you run the OpenTX 2.1.9 download, make sure your computer and radio are prepared to handle the process without errors. opentx 2.1.9 download
OpenTX 2.1.9 is the final and most stable version of the 2.1 branch of the open-source RC transmitter firmware. While newer versions like 2.3.x exist, 2.1.9 remains a classic choice for older hardware or pilots who prefer its specific telemetry handling and UI. 📥 Where to Download OpenTX 2.1.9
Although OpenTX 2.3 and EdgeTX are now standard, some users stick with 2.1.9 for specific reasons:
Go to Settings > Settings in the top menu. Under the "Radio Profile" tab, ensure you select the exact transmitter you own (e.g., FrSky Taranis X9D, Turnigy 9X). It introduced a completely overhauled telemetry system that
Note: Windows XP users may need to install the Microsoft Visual C++ 2008 Redistributable to run the simulator. Why OpenTX 2.1.9 Matters
Boot the transmitter into by pinching the two horizontal trim switches toward the power button while turning the radio on.
| Platform | Download Link | | :--- | :--- | | | companion-windows-2_1_9.zip | | macOS | companion-macosx-2_1_9.zip | | Linux DEB (64-bit) | companion21_2_1_9_amd64.zip | | Linux DEB (32-bit) | companion21_2_1_9_i386.zip | | Linux RPM (32-bit) | companion21-2_1_9-i686.zip | 💡 Why stay on 2
To get 2.1.9 onto your radio, you don’t just "download a file" and copy it over. You need the OpenTX Companion . This software acts as the bridge between your PC and your transmitter, allowing you to: your specific radio type. Back up your existing models and settings. Flash the customized firmware directly to your device. Pro Tip for Windows Users
(Note: If you have trouble starting the simulator on Windows XP, you may need the Microsoft Visual C++ 2008 Redistributable Companion 2.1.9 dmg : Available in 32-bit DEB 64-bit DEB 32-bit RPM Key Features of the 2.1 Branch Telemetry Overhaul
The Ultimate Guide to OpenTX 2.1.9: Features, Installation, and Downloads
Features the overhauled, highly stable 2.1-generation telemetry framework.
OpenTX 2.1.9 was a significant stable release in the lifecycle of the OpenTX open-source firmware for RC radio transmitters. Released on , it served as the final minor update to the 2.1 branch before the community transitioned toward the 2.2 series. Overview of OpenTX 2.1.9