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medor
I hope that someone answers you about option 2, because I am with the same receiver and the same voltage sensor. And I want to have the voltage of each lipo cell on the radio.
Greetings

Good morning: I have used a translator because I don't know your language. If it is for an airplane, I would recommend that the station be ACCEST because this system is simpler. But keep in mind that these stations are more demanding in terms of knowledge, I come from Futaba, I'm a certain age, and ...

Use Companion to install the firmware on the radio. Don't touch anything on the Taranis drive, just work with the Sd card.
Remember the radio is always salvageable.

On the Frsky page look for your radio in discontinued.
Then Install the latest firmware available for your radio x9dp-v2.2.2 from 2018-05-28 and if you want or not you have installed before the internal module firmware 2020-03-24 ACCST D16 v2.1.0

Sorry for the delay due to work reasons. Don't worry the radio is always recoverable, it has a "bootloader" built into the CPU, it can't be damaged. Delete and Reinstall Zadig, on your computer. Taranis off, connect USB to computer. Use Zadig as administrator. Use the list all devices opti...

Another question, do you use Companion?

I'm going to help you, but first need you to tell me what type and model of Taranis you have?
X9D, X9D+, X9d + Special Edition?
You should also know that I don't use your language but a translator, but I think we'll get it done, don't throw away the radio.