Your transmitter requires specific folder structures (BMP, SOUNDS, MODELS) on the microSD card to function without errors.
Offers 9 flight-mode-specific variables to adjust mixes and gains on the fly.
OpenTX 2.1.9 is a stable, battle‑tested release that offers a sweet spot of advanced telemetry without the complexity of later versions. Whether you are upgrading an older radio, recovering vintage model files, or simply prefer the classic 2.1.x workflow, the instructions and download links provided here will get you flying quickly and safely.
: Open Companion, go to , and select your specific radio model (e.g., Taranis X9D+ Go to product viewer dialog for this item. Turnigy 9X Go to product viewer dialog for this item.
| Feature | OpenTX 2.1.9 | OpenTX 2.3.15 (Modern) | | :--- | :--- | :--- | | | ✅ Full support | ❌ Dropped support | | Lua API | Legacy (v1) | Modern (v2 & v3) | | Telemetry screens | Classic grid layout | Customizable widget system | | Multi-Protocol Module (iRangeX, 4-in-1) | Limited, no auto-detect | Full support with auto-detect | | FrSky ACCESS protocol | ❌ No | ✅ Yes | | Touch-screen support | ❌ No | ✅ Yes (RadioMaster, etc.) | opentx 2.1.9 download
Available on the official OpenTX 2.1.9 release page.
If you are looking for modern features, including touchscreen support and faster processors, you should look at EdgeTX instead of 2.1.9. However, for supporting older hardware, the 2.1.9 firmware is the standard.
The OpenTX project keeps older releases on GitHub. You can download version 2.1.9 from there:
: OpenTX 2.1.9 is not compatible with newer radios like the FrSky Taranis X9 Lite, Q X7 (some versions), or any Express (ACCESS) hardware. These require OpenTX 2.3.0 or higher. Whether you are upgrading an older radio, recovering
With your radio profile configured, click the button (the cloud icon) on the top toolbar. Click Download Firmware .
Do not download random .bin firmware files from unofficial forums, as flashing the wrong file can brick your radio. Instead, download the official compiler: Navigate to the official OpenTX release repository online. Locate the release page.
OpenTX 2.1.9 remains a landmark version for RC enthusiasts, particularly those using legacy hardware or specific telemetry setups that require the stability of the 2.1 branch. While newer versions like 2.3 and EdgeTX have taken over the mainstream, many pilots still seek out this specific build for its reliability and compatibility with older FrSky sensors.
software first; it will then download the specific firmware for your radio. Companion 2.1.9 Installer Companion 2.1.9 Disk Image Ubuntu/Debian 64-bit Installation Tips companion 2.1.9 link not working · Issue #9029 - GitHub 10 Dec 2023 — | Feature | OpenTX 2
Here is how to find it and install it safely.
The main OpenTX website (open-tx.org) no longer directly links to these ancient builds on their front page. However, the project keeps all legacy releases on their GitHub server.
Downloading OpenTX 2.1.9 is a time capsule trip. It is stable for what it is, but I strongly recommend upgrading to (the modern fork) or at least OpenTX 2.3.15 immediately after you retrieve your old data.
If you are looking to revitalize your classic transmitter, here is exactly how to execute the safely, configure your software, and flash your radio. Where to Find the Official OpenTX 2.1.9 Download