opentx-flysky-th9x
For more details, check this post: https://martinsgmx.github.io/flashing-opentx-to-flysky-th9x-with-avrdude/
OpenTX 2.2 for FlySky TH9x
For more details, check this post: https://martinsgmx.github.io/flashing-opentx-to-flysky-th9x-with-avrdude/