| Platform | Download Link | |----------|---------------| | | companion-windows-2_1_9.zip | | Linux RPM 32‑bit | companion21-2_1_9-i686.zip | | Linux DEB 32‑bit | companion21_2_1_9_i386.zip | | Linux DEB 64‑bit | companion21_2_1_9_amd64.zip | | Mac OS X | companion-macosx-2_1_9.zip |
Rename your downloaded firmware file to something short (e.g., tx219.bin ) and copy it to the FIRMWARE folder on your radio's SD card.
Download the official standard SD card zip file specifically labeled for version 2.1.
Features complex AND/OR/XOR conditions to trigger functions based on stick positions or telemetry thresholds. opentx 2.1.9 download
As a final point release, 2.1.9 contains years of bug fixes, making it one of the most reliable firmware versions ever coded for RC transmitters. How to Safe Download OpenTX 2.1.9
Many legacy Lua scripts and custom voice packs were built specifically for the 2.1 architecture and do not require modification on this version. What’s New in OpenTX 2.1.9?
| Area | Fix | |------|-----| | | Changed USB interrupt grouping to resolve SBUS trainer issues (#2999) | | ADC Filtering | Added user‑controllable ADC jitter filter (enable/disable in Hardware settings) | | 9XR-PRO | Trainer inputs >TR4 now work | | External Module | Output type setting is now visible again | | Platform | Download Link | |----------|---------------| |
As a deprecated version, active support for OpenTX 2.1.9 has largely shifted to community forums. These are excellent resources for troubleshooting and guidance.
You did not eject the USB drive properly or held the trim switch while powering on. Fix: Power off, wait 10 seconds, power on normally.
Available on the official OpenTX 2.1.9 release page. As a final point release, 2
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Debian/Ubuntu packages ( .deb ) or source code compilation. Step 2: Download the 2.1.9 SD Card Contents
It introduced a completely overhauled telemetry system that became the industry benchmark for accuracy and sensor discovery.