The original upgrade notes from 2.0 to 2.1 can be found here. 2.1 introduced completely new telemetry handling compared to 2.0, and also requires a different sound pack (see below). It is the last version to support AVR-based radios (9X/9XR with stock board, Gruvin9x, DIY MEGA2560).
SD Card contents for nightly builds OpenTX 2.1 branchĭeprecated, no more support will be given but firmware downloads are still available for the time being. Only intented to verify if bugfixes/new features work as expected. Should be done before flashing these firmware. Asĭuring development, critical bugs might be introduced, these versions The nightly builds are automatic builds that are build every day.
