Curropted uno r4 wifi prints ESP-ROM:esp32s3-20210327 in serial

[nielsalol]

so i updated the firmware of my arduino r4 wifi and without doing anything the flash failed i treid very much to fix it but i just cant upload to it or turn on the bootloader mode and its just like printing stuff like ESP-ROM:esp32s3-20210327 and something like load do you guys know how to fix it?

[ptillisch]

Hi @nielsalol. Please add a forum reply here to tell us which operating system you are using (e.g., "Windows")?

I ask because I would like to give you the appropriate instructions for your operating system.

[nielsalol]

i am currently using 64 bit windows 11 home

[nielsalol]

update its also saying this in the serial so it ist bricked i suppose

[ptillisch]

When you update the firmware on the UNO R4 WiFi board, it is put into a special mode. The board remains in this mode after the firmware update process finishes.

You should be able to put the board into the normal mode where it is once more detected as an UNO R4 WiFi by power cycling the board.

Please try this:

1. Disconnect the USB cable of the UNO R4 WiFi board from your computer.
2. Connect the UNO R4 WiFi to your computer with the USB cable.

After doing that, the board should work normally once more. If it doesn't, add a reply here on this forum thread to let us know and we'll provide further assistance in recovering the board from this state.

[nielsalol]

so i treid mulitble times i unplugged it and plugged it back in it said uno r4 wifi uploaded the basic blink scetch but it was stuck on uploading with no porgress treid the process of unplugging it and plugging it back in a couple of times but still i cant upload anything to the board i also treid getting in bootloader mode i pressed the reste button 2 times but nothing happend

[ptillisch]

This indicates the standard firmware on the "bridge" module of the UNO R4 WiFi board has been replaced or corrupted. That could happen if you accidentally uploaded a sketch while the bridge module was in the boot mode (as happens when you do a firmware update), or perhaps if the firmware update procedure failed.

The board can be recovered by flashing the standard firmware to the bridge module. The tools we normally use for updating the firmware can't be used when the board is in this state, so it is necessary to use a command line procedure.

I'll provide instructions you can follow to do that:

1. Disconnect the USB cable of the UNO R4 WiFi board from your computer.
2. Use a jumper wire to connect these two pins ("DOWNLOAD" and "GND") on the 2x3 male header that is near the USB socket on the UNO R4 WiFi board:
   
   
   📷

   Arduino - CC BY-SA 4.0 (cropped)

3. Connect the UNO R4 WiFi board to your computer with a USB cable.
4. Open the release page for the latest version of the firmware in your web browser:
   https://github.com/arduino/uno-r4-wifi-usb-bridge/releases/latest
5. Click the "unor4wifi-update-windows.zip" download link under the "Assets" section of the release page:
6. Wait for the download to finish.
7. Extract the downloaded file.
8. Start Windows "File Explorer".
9. Open the unor4wifi-update-windows folder that was created when you extracted the downloaded unor4wifi-update-windows.zip file at the previous step in the instructions.
10. In the folder listing of the unor4wifi-update-windows folder, hold the Shift key while clicking the right hand button on the mouse.
    A context menu will open.
11. Select "Open PowerShell window here" from the menu.
    Windows PowerShell will now open.
12. Type the following command at the Windows PowerShell window command prompt:

    bin\espflash write-bin -b 115200 0x0 (Get-Item .\firmware\UNOR4-WIFI-S3-*.bin).FullName
    

13. Press the Enter key.
14. The PowerShell window might now show a list of the serial ports present on your computer.
    For example:

    Start flashing firmware
    [2023-07-11T06:39:09Z INFO ] Detected 2 serial ports
    [2023-07-11T06:39:09Z INFO ] Ports which match a known common dev board are highlighted
    [2023-07-11T06:39:09Z INFO ] Please select a port
    ❯ COM1
      COM42- USB Serial Device (COM42)
    

    If so, use the ↓ key on your keyboard to select the port of the UNO R4 WiFi board from the list, and then press the Enter key.
15. The terminal window will now show the following prompt:

    ? Remember this serial port for future use? (y/n) ›
    

    Press the N key on your keyboard.
16. The flashing process should now start. Wait for it to finish, as indicated by output that looks something like this:

    Chip type:         esp32s3 (revision v0.1)
    Crystal frequency: 40MHz
    Flash size:        8MB
    Features:          WiFi, BLE
    MAC address:       dc:54:75:c4:c6:54
    [00:00:15] [========================================]      826/826     0x0
    

17. Disconnect the USB cable of the UNO R4 WiFi board from your computer.
    It is essential to perform this step.
18. Disconnect the jumper wire you added at step (2) of the instructions.
19. Connect the UNO R4 WiFi board to your computer with the USB cable again.

The board should now be recognized correctly in Arduino IDE once again.

---

Please let me know if you have any questions or problems while following those instructions.

[nielsalol]

Thank you so much my arduino is back up and running thanks for the support

[ptillisch]

You are welcome. I'm glad it is working now.

Regards, Per