If you are an RC hobbyist, you know that the software running your transmitter is just as important as the hardware itself. For years, OpenTX has been the undisputed king of radio firmware, offering unparalleled flexibility.
Telemetry Conversion: 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. opentx 2.1.9 download
OpenTX 2.1 requires OpenTX Companion 2.1. If you try to use a newer version of Companion, you risk corrupting your radio’s firmware or SD card contents. OpenTX 2
Downloading and Installing OpenTX 2.1.9