Yep, since you have X9E radios, this is very possibly the case you are running into. Good job Mike!
This is why you could not do with with FrSky firmware on the receivers either.
You will need to burn new ACCST firmware and may not be a bad idea to update OpenTX too.
This is why you could not do with with FrSky firmware on the receivers either.
You will need to burn new ACCST firmware and may not be a bad idea to update OpenTX too.