Opentx 2.1.9 Download [updated] Jun 2026

Ensure your SD card structure matches the 2.1 version requirements to avoid "missing file" warnings. 📉 Why 2.1.9?

: 2.1 introduced a major "Telemetry Rewrite." Sensors are no longer hardcoded; you must use the "Discover New Sensors" function on the radio's telemetry page. EEPROM Conversion opentx 2.1.9 download

OpenTX 2.1.9, released in late 2016, is considered a "legacy" version of the open-source firmware for RC radio transmitters. While it was a stable and significant milestone for its time, it has since been superseded by the 2.2, 2.3, and current EdgeTX branches. Ensure your SD card structure matches the 2