UNO R4 WiFI not detected

Hardware UNO R4 UNO R4 WiFi
1

I was working with a UNO R4 WiFi when my laptop suddenly stopped detecting it.
I have tried other boards with my computer - it works fine
I have tried other computers with the same board - it works fine

I am using Windows 11, and nothing changes in the Device Manager when I connect the board.

Visually, there is no damage on the board; nothing is burned.

When I double-press the reset button, the L LED starts to dim, which means the board works but is not detected.

I was thinking of trying to program it using another Arduino Uno R3, but I couldn't find a tutorial for it.

Can anyone assist me with what I can change or how I can program and solve this issue?

2

Try these steps:

  1. Do complete Uninstall Arduino IDE and then re-install the Arduino IDE (use Arduino IDE 2.3.2). Make sure that you install all the dependencies that shows up after the installation. If your machine is running Windows 11, grant the IDE admin right during installation.

  2. Install your board's Package Core, it contains the board's driver.

  3. Use a good quality data USB cable to connect the board to the computer without anything connected or wired to the board. Charging/bad USB cable will make it impossible for your computer to detect your board.

  4. Make sure you select the board and the port it is connected to before uploading a sketch.

  5. If #1-4 above fails to solve it, double tap the reset button fast and check the status of the onboard "L" LED. If the onboard LED fade in and out slowly (pulsating), upload an example sketch (Blink LED) from the IDE to the board.

3

I have tried steps 1 and 2, it didn't help.
Step 3 is done since I am able to connect to other boards via the same USB cable
Step 4 - board is selected, but com port is not detected
Step 5 - when i double click the reset button "L" led pulsates, but still no com port is detected.

I feel that my board is bricked and something happened to the bootloader, however i don't know how I can repogram it.

4

Make sure that your board is the only USB device attached to the computer and then run the " Run espflash directly" process from Update the connectivity module firmware on UNO R4 WiFi. Once done correctly, reset the board via the reset button and then upload Blink LED sketch to the board. If this does not work, try using a different computer and USB cable to try it.

5

This method would work if my Arduino was detected on a COM port, however it is not detected at all, so the firmware updater of Arduino IDE can't update the firmware. How can I upload the original hex/bin file to the MCU directly?

6

You need to try this https://support.arduino.cc/hc/en-us/articles/16379769332892-Restore-the-USB-connectivity-firmware-on-UNO-R4-WiFi-with-espflash

7

Why do I need to login on that page?

8

Can see that the Arduino Content Team has made a change to the original article, will contact them to know why this. Just noticed it myself today.

1 Like
9

Can you try to access it now?

10

OK, works now :+1:

1 Like
11

I am trying this approach, however it writes that No serial port could be detected, however I am sure that I have a working USB cable, because I have tried the same with a working board and it went well. So i have an issue that the board is not detected by the computer at all

12

Contact Arduino Support via Contact us with details of the issue, what you have tried and include your purchase receipt (pdf).