I’m experiencing an issue with my Arduino UNO R4 Minima board and would appreciate some help.
The board seems to be stuck in DFU (Device Firmware Update) mode, and although it's recognized by my computer, I am unable to upload any sketches. Here's a summary of what’s happening:
Symptoms:
1 When connected to my PC, the board shows up as "Santiago DFU" in Device Manager under the DFU port only after I press the reset button. If I don't press the reset button, it just shows a generic "DFU port" (greyed out in the Arduino IDE, not selectable).
2.The board’s orange LED is continuously blinking, which suggests it's in bootloader mode, waiting for a new sketch to be uploaded.
3.When I try uploading a sketch (such as the Blink example), nothing happens, and the "Santiago DFU"port appears again as dfu-rt port in Device Manager after the upload attempt.
4.In addition to the Santiago DFU port, I also see a "2-2 (Arduino R4 Minima)" port in the Arduino IDE under Tools > Port. This port is selectable, but when I try to upload a sketch (such as the Blink example),same thing happen the led blinks
Steps I’ve Tried:
Pressed Reset Button: I pressed the reset button on the board but still nothing changes.
Power Cycled the Board: I disconnected and reconnected the USB cable but the issue persists.
Checked COM Port in IDE: I made sure Arduino UNO R4 Minima was selected in the Tools > Board menu and tried uploading via the correct COM port (which is listed as "2-2 (Arduino R4 Minima)").
Tried Uploading Blink Sketch: Uploaded the Blink sketch with the correct port selected, but it didn’t upload, and the board’s behavior stayed the same (blinking LED, stuck in DFU mode).
Tried on a Different USB Port/Computer: I tried connecting the board to different USB ports and even tested it on another computer.
Questions:
1.Is this behavior expected for a board in DFU mode? Should the "Santiago DFU"port be selectable in the Arduino IDE?
2.How do i get our of dfu mode
3.Could this be a bootloader issue, and if so, how can I resolve it?
I’d appreciate any advice or suggestions on how to get my board working again.
Thank you in advance!
edit;
i just uploaded some other sketch (Bareminimum)and it stop blinking don't know why😭 pls help
update: i just formatted my pc and then plug in it got resolve
sry for the trouble
and thanks for replying ptillisch and bitseeker for helping me
Can I ask, which version of the IDE you are using please?
You say that you tried on a different computer and different ports, but have you tried a different USB cable?
In File->Preferences, find the line where it says Show verbose output during. Uncheck Compile but check Upload . The try the upload again. Finally post the output here, making sure to enclose it in CODE tags.
On DFU capable boards it is possible for a DFU and a Serial port to appear. The board gets switched to DFU mode for the upload and then back to Serial again. However, whether the behavior you describe is normal for this board, I am not sure.
Hi @hadaquestion. This problem might be caused by the driver for the UNO R4 Minima board not having been installed. Arduino IDE attempts to automatically install the drivers for you when you install the "Arduino UNO R4 Boards" platform that adds support to Arduino IDE for the UNO R4 Minima board. However, the drivers will not be installed under either of the following scenarios:
You dismissed the Windows User Account Control (UAC) dialog for the driver installation:
Do you want to allow this app from an unknown publisher to make changes to your device?
dpinst-amd64.exe
Your Windows user account does not have the necessary administrative privileges to install drivers.
If it was the former, then the solution will be to reinstall the "Arduino UNO R4 Boards" platform, making sure to approve the driver installation offer this time:
Select Tools > Board > Boards Manager... from the Arduino IDE menus to open the "Boards Manager" view in the left side panel.
Find the "Arduino UNO R4 Boards" entry in the list of boards platforms.
Hover the mouse pointer over the "Arduino UNO R4 Boards" entry.
You will see a ●●● icon appear at the top right corner of the entry.
Click the ●●● icon.
A menu will open.
Select "Remove" from the menu.
An "Uninstall" dialog will open.
Click the "YES" button in the "Uninstall" dialog.
The dialog will close.
Wait for the uninstall process to finish, as indicated by a notification at the bottom right corner of the Arduino IDE window:
Successfully uninstalled platform ...
Click the "INSTALL" button at the bottom of the "Arduino UNO R4 Boards" entry.
You should now see a "User Account Control" dialog about dpinst-amd64.exe asking whether you "want to allow this app from an unknown publisher to make changes to your device". Click the "Yes" button in the dialog:
Wait for the installation process to finish, as indicated by a notification at the bottom right corner of the Arduino IDE window:
Successfully installed platform ...
Hopefully the UNO R4 Minima board will now produce a serial port as expected.
This is normal and expected when the board is in the boot mode triggered by a double reset. "Santiago" was the working title for the UNO R4 Minima board during the initial development of the product and the developers never changed the name in the driver.
Please note that the LED pulses when the board is in this state, meaning it fades back and forth between full off and full on states. We use the term "blink" to describe a sharp transition between an on and an off state, so it is not an accurate term to use to describe the pulsing behavior.
This is how Arduino IDE identifies the USB device that is identified as "Santiago DFU" in Windows Device Manager. Arduino IDE uses a different source of data to identify the ports of Arduino boards, and that data used by the IDE does have the correct board name.
Yes, but as I explained above the port will be named something like "2-2 (Arduino R4 Minima)" in the Arduino IDE menus, not "Santiago DFU".
