: If you are upgrading from 2.0.x, your telemetry settings will need to be reconfigured, as 2.1 introduced a new "discovery" method for sensors.
Connect your radio to your PC via USB while the radio is turned on in (pinch the two horizontal trim switches inward while powering on). Click the Read Models and Settings from Radio icon. opentx 2.1.9 download
However, if you specifically need for an older radio (e.g., Taranis X9D, X9D+, X9E) or to maintain compatibility with old setups, direct downloads are no longer available on the official OpenTX website (they only host the latest 2.3.x). : If you are upgrading from 2
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. However, if you specifically need for an older radio (e
Look for the opentx-companion-2.1.9.dmg file. Step-by-Step Installation Guide
Check your preferred build options (e.g., eu if you are in Europe for LBT compliance, noheli , lua ).