This guide will cover the upgrade process for Taranis to OpenTX 2.2.0 on Windows 10. It will likely be applicable to other Windows versions, but other operating systems may differ drastically.

Here is the release page for the OpenTX 2.2.0 Release.

Caution! When upgrading your Taranis, you will likely lose all your models and settings. If these are important to you, back them up! It may be possible to perform the upgrade without losing this information, but I have not tested it. Read the release notes on the OpenTX page for more information on this.

Installing OpenTX Companion Software

At the bottom of the release page, you will find a link to the OpenTX Companion 2.2.0 Windows Installer. Download that and install it.

If you had previously installed another version of OpenTX Companion, you will likely notice that the companion software will not open when you launch it. This is because of a bug which causes old settings to crash the program. You can fix this by downloading the registry fix also found on the bottom of the release page. Once downloaded, double click the file and confirm that you want to “add the registry values” to your computer. This should fix the Companion software so that you can open it.

When you launch Companion, you should be greeted with this prompt:

frsky firmware notice

Click “Yes” to download the firmware. This didn’t work initially for me. I got an error message saying “Invalid Language”. This can be fixed by opening the Settings menu in companion, and re-selecting your radio type (even if it is already selected):

taranis settings edit

Close and re-launch Companion to get the prompt to download the firmware again.

Copy SD Card Files to your Taranis

Before you flash the firmware of your Taranis, you’ll want to copy the correct filesystem to its SD card. You can download the 2.2.0 filesystem on the release page, labeled “SDCard content for 2.2.0”.

Remove the SD card from your Taranis. If you are concerned about data loss, back up the card on your computer’s filesystem. Next, format the SD card and copy the contents of the zip file you downloaded from the release page. You can also do this by plugging the radio into your computer, if you have the proper drivers installed.

Put the SD card back into your Taranis and plug it into your computer using a mini USB cable.

Flash OpenTX 2.2.0 on your Taranis

Once you’ve gotten Companion installed and the radio firmware downloaded, it’s time to flash your radio. Click the “Flash Firmware” button in the left hand toolbar:


You will be prompted with the flash firmware dialog:

opentx firmware

Connect your TX to your computer using the USB mini port on the back of the radio and click “Write to TX”. The flashing process will begin automatically.

You may get an error message saying your radio drivers are not installed properly. You will need to use a program called Zadig to swap your drivers around. Googling will be needed as I did not experience this problem.

Now, disconnect your radio and turn it on. You may get an “EEPROM WARNING”. Press any key to begin a conversion process which will complete the firmware installation.

Update your bootloader

There’s one last step before you are done – update your bootloader. This step is not required, but it is a smart thing to do. Here are the steps:

  1. Download the FrSky 2.2 firmware file by accessing File->Downloads->Download Firmware from the Companion software:
    frsky bootloader
  2. Access the SD card contents for your Taranis by plugging the radio into your computer or removing the SD card and plugging that into your computer.
  3. Copy the file you downloaded in step (1) to the SD card under the FIRMWARE folder.
  4. Rename that file to “OPENTX220.bin”.
  5. Turn on your Taranis (after unplugging it from the computer and re-inserting the SD card where applicable).
  6. Long press the menu button.
  7. Press page to access the file browser menu. You should see the contents of your SD card on the Taranis’ screen.
  8. Scroll down to the FIRMWARE folder and press enter.
  9. Select OPENTX220.bin and press and hold enter.
  10. Select “Flash Bootloader” to flash your bootloader.
Firmware Installation Completed

Congratulations, you’ve done it! Your firmware upgrade is now complete.



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