Not sure how to update EdgeTX on the RadioMaster Zorro? This guide will help you out.

The RadioMaster Zorro comes with factory installed EdgeTX, but it’s always a good idea to update your EdgeTX to the newest version. EdgeTX is rapidly evolving and getting new features, so we always recommend to update to the latest stable version before setting up all your models.

In this tutorial we will guide you step-by-step to update your RadioMaster Zorro to the latest EdgeTX version.

Multiple ways to update EdgeTX

There are multiple ways to update EdgeTX on your RadioMaster Zorro.

  1. Using EdgeTX buddy: this is a small webapp that runs in google chrome. No additional software required.
  2. Using EdgeTX flasher: standalone flasher for EdgeTX firmware. Requires software.
  3. Manually transfer firmware files, sd card files and flash from the transmitter.

We will go through each different option starting with – in our eyes – the most easy way and ending with the most ‘ difficult ‘ one.

Always backup first!

Whatever method you use to flash / update EdgeTX to your Zorro, backup your current settings first so you can always roll back if necessary.

Connect your Radiomaster Zorro with the supplied USB-C cable to the top port (data port) of your Radiomaster Zorro. When prompted on your Radiomaster Zorro, Select ‘ USB Storage ‘ and wait for windows to recognize your Zorro.

Browse to the SD card in windows explorer and copy everything on the SD card to a folder on your computer.

Always check installed version first!

Before installing a new version, it’s good to first check if updating is necessary.

Start by turning on your RadioMaster Zorro.
Long Press the ‘ SYS ‘ button
Scroll to the VERSION tab (tab 7) by once pressing the ‘ Page < ‘ button

Make a note of the firmware version that is displayed in this tab. You find the version after ‘ VERS: ‘

1. Using EdgeTX buddy to update EdgeTX on the Radiomaster Zorro

EdgeTX Buddy is a google chrome webapp that enables you to update EdgeTX on your RadioMaster Zorro without the need to install any software.

EdgeTX buddy is a convenient and easy way to update your Zorro without much hassle.

Pros: Easy to use. EdgeTX SD card Creation. Can flash bootloader when bootloader is broken.
Cons: Only works with Device-Firmware-Upgrade (DFU) mode. Needs working DFU drivers under windows.

Using EdgeTX buddy to update EdgeTX on the Radiomaster Zorro

Total Time: 15 minutes

  • Connect RadioMaster Zorro to your computer in DFU mode

    Make sure your RadioMaster Zorro is off. Plug in the supplied USB-C cable to the top USB-C port (data port) and connect the Zorro to your computer. You should hear the familiar windows sound when plugging in a usb device.

    If you never did this before, windows will show you that it’s installing a ‘ STM32 BOOTLOADER ‘ device.

    If you want to confirm your unit is connected, go to device manager in windows and check under ‘ Universal Serial Bus devices ‘ that a ‘ STM32 BOOTLOADER ‘ device is connected.

  • Open the EdgeTX buddy page

    Open your google chrome browser and go to https://buddy.edgetx.org/

    Select the latest stable EdgeTX version and select your Radio Model. After selecting those, the ‘ Flash via USB ‘ button in the webapp will get blue.

  • Select your Zorro

    Press the ‘ Flash via USB button ‘ to go to the next screen.

    Click on ‘ Add new device ‘ on this screen and click on the ‘ STM32 BOOTLOADER ‘ device. Then click on ‘ Connect ‘

  • Highlight the STM32 BOOTLOADER device

    Click on the STM32 BOOTLOADER device to highlight it and then click on ‘ Next ‘

  • Start Flashing EdgeTX firmware

    Click on Start flashing. EdgeTX buddy webapp should start with flashing your Zorro.

    If you get any errors or it doesn’t work, make sure that you did select the right device in the previous steps.

    It’s also possible that you don’t have the right DFU drivers. Go to https://impulserc.com/pages/downloads and download the ImpulseRC Driver Fixer tool. With your Zorro connected to your computer (Zorro should be off), open and run the downloaded file and wait for the program to finish. Then try again.

  • Setup the SD card

    Click on ‘ setup your SD card ‘ or go to https://buddy.edgetx.org/#/sdcard.

    Disconnect your RadioMaster Zorro from your computer.
    Turn on your RadioMaster Zorro and connect it again to your computer.
    On the screen of the RadioMaster Zorro you will be prompted. Select ‘ USB Storage ‘.
    Windows will tell you that a mass storage device is connected.
    Click on ‘ Select SD card ‘ and Select the USB Drive. Do not select the RM ZORRO drive

  • Selecting the right files for SD card

    Select the firmware version as you previously installed it to your Zorro.
    Select your Radio Model.

    Select the sound pack that you want to use.

    Click on apply changes.
    Click on Re-install.

  • Done!

    You are now done and flashed your RadioMaster Zorro to the newest EdgeTX version with the EdgeTX buddy webapp!

    By default, the EdgeTX budy webapp sets up your transmitter as a ‘ Mode 1 ‘ transmitter. If you use a different mode, don’t forget to change it:

    1) Long press ‘ SYS ‘ button
    2) Go to the ‘ Radio Setup ‘ tab by pressing 2x on the ‘ Page > ‘ button
    3) Scroll down to the bottom and choose your preferred Mode

2. Using EdgeTX flasher: standalone flasher for EdgeTX firmware. Requires software.

EdgeTX Flasher is a stand-alone gui based program that enables you to update EdgeTX on your RadioMaster Zorro.

EdgeTX Flasher is a convenient and easy way to update your Zorro without much hassle.

Pros: Easy to use. EdgeTX SD card Creation. Can flash bootloader when bootloader is broken.
Cons: Only works with Device-Firmware-Upgrade (DFU) mode. Needs working DFU drivers under windows.

Download EdgeTX flasher

Go to https://github.com/EdgeTX/flasher/releases/tag/latest and download the latest EdgeTX flasher tool for your platform. We are using windows, so we download the windows EdgeTX Flasher tool.

After Download finished, install the EdgeTX flashter tool to your system.

Once Installing is finished, EdgeTX flasher will be opened automatically. If not, open the program manually. You will be greeted with a Welcome screen.

Connect your RadioMaster Zorro to your computer in DFU mode

Make sure your Zorro is powered off. Connect the supplied USB-C cable to the top USB-C port (Data) and connect the other end to your pc to connect your RadioMaster Zorro. While the screen of the Zorro remains blank, you should now hear the familiar windows usb device plugged in sound.

If you never did this before, windows will show you that it’s installing a ‘ STM32 BOOTLOADER ‘ device.

If you want to confirm your unit is connected, go to device manager in windows and check under ‘ Universal Serial Bus devices ‘ that a ‘ STM32 BOOTLOADER ‘ device is connected.

Click on Install EdgeTX and follow the steps in the wizard

First click on ‘Install EdgeTX’ to start a step-by-step proces to update your Radiomaster Zorro.

In step 1, pick the latest version. Thereafter click next

In step 2, choose the radio make and model that you are flashing. In our case we are upgrading a RadioMaster Zorro, so we pick that one.

Then click on ‘ Flash Firmware ‘. EdgeTX Flasher will now start to upgrade your EdgeTX firmware on your zorro.

After EdgeTX Flasher shows that Flashing is complete and ‘ File Downloaded successfully ‘, click on close.

Do you get errors when trying to flash? Most of the time this comes to driver problems! EdgeTX Flasher needs DFU drivers to be installed when you are using windows.

Go to https://impulserc.com/pages/downloads and download the ImpulseRC Driver Fixer tool. With your Zorro connected to your computer (Zorro should be off), open and run the downloaded file and wait for the program to finish. Then try again.

EdgeTX is now succesfully flashed to your RadioMaster Zorro.

Update SD card files

EdgeTX needs multiple sd card files to work. In this step we’re going to show you how to update your RadioMaster Zorro SD card files using the EdgeTX Flasher tool.

Start by clicking on ‘ Setup SD Card ‘ in EdgeTX flasher to open the SD Card preparation tool screen.

  1. Start by picking your Radio Target. Since we are flashing a RadioMaster Zorro, we are picking that one.

2. Scroll a bit down and tick the checkboxes with Voicepack languages. We are using ‘ American English Female ‘.

3. Scroll down further, and pick the Lua Scripts and Tools that you want to install. Since we are using an ExpressLRS Zorro, we’re only ticking the checkbox for ‘ ExpressLRS Lua V2 ‘.

4. Disconnect your Zorro from your computer first and then turn on your Zorro. Let it boot and connect the supplied USB-C cable to the top USB-C data port of the zorro and to your computer. You will be asked to select a Mode on your Zorro’s display. Scroll to ‘ USB Storage (SD) ‘ and confirm by pressing the rollerbutton. You will hear the familiar Windows sound and see that a mass storage device gets connected.

5. In windows explorer, find the right drive letter. You are looking for ‘ USB drive ‘. Open it and check if there’s a folder structure visible that contains things like ‘ EEPROM ‘, ‘ FIRMWARE ‘, ‘ LOGS ‘, ‘ MODELS ‘ etc.

Once found, remember the Drive letter. We need this in EdgeTX Flasher.

6. Go Back to EdgeTX flasher and scroll down to ‘ Select Disk ‘ .

Click Re-Scan Disks.

Pick the drive letter you found in step 5.

Tick, if you want, ‘Erase before flash’ . !!BE SURE to pick the right drive!!

Then, click on ‘ Write to sd card ‘. Click on ‘ Continue ‘ in the ‘ Are you sure?” popup.

EdgeTX flasher will now wipe your sd card (except the MODELS and RADIO folder), download the newest EdgeTX sd card files and transfer them to your Zorro SD card. This can take a while, just be patient and let EdgeTX Flasher do it’s job.

All done! You now updated EdgeTX on your RadioMaster Zorro to the latest version!

By default, the EdgeTX Flasher sets up your transmitter as a ‘ Mode 1 ‘ transmitter. If you use a different mode, don’t forget to change it:

1) Long press ‘ SYS ‘ button
2) Go to the ‘ Radio Setup ‘ tab by pressing 2x on the ‘ Page > ‘ button
3) Scroll down to the bottom and choose your preferred Mode

3. Manually transfer firmware files, sd card files and flash from the transmitter (The way the pro does it!)

This is the way the pro’s do it. With this way of doing it, you manually download the firmware file and transfer it to your SD card. Thereafter, you can flash the newest version of EdgeTX from within EdgeTX.

Pros: Doesn’t need any drivers or software to work. Most robust way of updating EdgeTX on your RadioMaster Zorro
Cons: Your transmitter must already be running OpenTX or EdgeTX. It’s not possible to ‘un-brick’ your transmitter if the bootloader is damaged.

Download and install SD Cards files

Go to https://github.com/EdgeTX/edgetx-sdcard/releases and download the latest SD card contents zip file suitable for your transmitter. The RadioMaster Zorro uses the ‘ taranis-x7.zip ‘ binary.

Connect your RadioMaster Zorro in ‘ USB Storage (SD) ‘ mode to your computer by powering on your RadioMaster Zorro and connecting a USB-C cable to the top USB-C Data port. When prompted to ‘ select mode ‘, scroll to ‘ USB Storage (SD) ‘ and enter. If all went well, your RadioMaster Zorro is now connected to your computer.

Open your file explorer and navigate to the newly appeared ‘ USB drive ‘. This drive should contain folders like ‘ EEPROM ‘ , ‘ FIRMWARE ‘ , ‘ MODELS ‘ , ‘ RADIO ‘ , etc.

Backup all files to a safe location in case you want to backup.

Now delete all files from your SD card (or format as FAT32) and copy the contents of the previously downloaded ‘ taranis-x7.zip ‘ file to your blank SD card. If all files finished transferring, you can copy the MODELS and RADIO folders from your backup to the SD card. This way EdgeTX will import your old models and settings on the first boot. You can also copy your SOUNDS folder or download the newest one in the next step.

If you didn’t copy your SOUNDS folder to the SD card and want to use the newest sounds, go to https://github.com/EdgeTX/edgetx-sdcard-sounds/releases and downoad your preferred language.

After downloading, copy the contents SOUNDS folder in the zip file to your SD card

Download and flash (update) EdgeTX on your RadioMaster Zorro

Go to https://github.com/EdgeTX/edgetx/releases/latest and download the latest release zip file.

Open the downloaded zip file (edgetx-firmware-vx.x.x.zip) and search for the file zorro-*.bin . Transfer this file to FIRMWARE folder on your sd card.

Disconnect your Zorro from your computer.

Long press the ‘ SYS ‘ button and navigate to the ‘ SD CARD ‘ tab by once pressing ‘ Page > ‘.

Scroll to the ‘ [FIRMWARE]’ folder and enter it by pressing the roller button.

Scroll to the zorro-*.bin file you previously transfered to this folder and long press the roller button. Now select ‘ Flash bootloader ‘ by using the roller button. EdgeTX bootloader will now be installed.

Exit back to the main screen of the RadioMaster Zorro by pressing ‘ ok ‘ and ‘ Rtn ‘ and turn off your radio.

Boot your RadioMaster Zorro in Bootloader mode by pressing both trimbuttons next to the powerbutton inwards (to the power button) while once pressing the powerbutton. Your zorro wil now enter bootloader mode

Select option ‘ Write firmware ‘ and scroll to the zorro-*.bin file you previously transferred to your sd card. Press the roller button to confirm.

Long press ‘ [ENT] ‘ (the rollerbutton) to start updating EdgeTX. The bootloader will now start to update EdgeTX on your RadioMaster Zorro.

Once you see the message ‘ writing complete ‘, press enter to go back to the main menu.

Scroll to Exit en Enter to restart the RadioMaster Zorro.

You are now finished updating EdgeTX on the RadioMaster Zorro!

If you did not add the RADIO and MODELS folders to your SD card for conversion, when the radio starts with EdgeTX for the first time, you will get a STORAGE WARNING – Bad Radio Data-. Press the white circle or roller to bypass the warning. Then you will get another STORAGE WARNING – Storage Preparation. Press the white circle or roller again. Once the SD card is prepared, the calibration screen will appear. Calibrate your radio.

If you did add the RADIO and MODELS folders to your SD card for conversion you should see a message telling you that a SD conversion is necessary. Select the white circle and it will begin converting your models. Depending on your previous radio settings the calibration screen may appear, If so, Calibrate your radio.

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