I have gotten my hands on an Uno R4 Minima board and am struggling to upload sketches to it. I am able to on a separate Windows 10 computer, am unable to on my Windows 11 laptop. On the laptop I consistently get the following error message whenever I try and upload a sketch:
Cannot open DFU device 2341:0069 found on devnum 1 (LIBUSB_ERROR_NOT_FOUND)
No DFU capable USB device available
Failed uploading: uploading error: exit status 74
Under "Other Devices" in the Device Manager I see this:
So I believe there is something wrong with my drivers but I cannot manage to fix it regardless of what tools I use. Any advice would be amazing.
Yes, you have to get out of DFU mode. Here are the instructions.
If the board is in DFU mode but still detected by your computer (usually as a USB device called “Arduino UNO R4 Minima (DFU)”), try this:
- Open the Arduino IDE (version 2.x recommended).
- Go to Tools > Board , and select Arduino UNO R4 Minima .
- Go to Tools > Port, and select the DFU port (if available).
- Open a basic sketch (like Blink) and upload it.
If successful, uploading a sketch will exit DFU mode automatically.
Here is another way
Method 2: Double-Reset Trick
If the board is stuck or unresponsive:
- Press the Reset button twice quickly.
- This attempts to put the board into the bootloader.
- You may see a different USB device show up temporarily.
- Then upload a sketch immediately .
Timing can be tricky—try a few times if needed.
Confirming It’s Out of DFU
Once it’s out of DFU mode, it should:
- Show up as a normal serial device (like /dev/ttyACM0 or a COM port).
- Be uploadable from the Arduino IDE without any DFU indicators.
When plugged in the device shows as:
I tried both methods a few times but continue to get the same error as before. In the bottom right corner of the application it reads "Arduino UNO R4 Minima on COM3" outside of bootloader and the same with "[not connected]" at the end when bootloader is active.
I am unable to find a USB device named “Arduino UNO R4 Minima (DFU)” in device manager when I plug it in the three things that appear are both objects in the image below as well as a "USB composite device" under Universal Serial Bus controllers.
You should read the documentation for the board. It can be used in one of two modes, normal and DFU. Somehow, your board got switched from normal to DFU. I gave you the instructions to get out of DFU. I left out the parts you should already know, like restarting the IDE, possibly rebooting Windows, although unlikely.
Show me the screen when you do procedure 1, then procedure 2. Don't forget to restart the IDE and Windows after each one. If it is still stuck, there is a 3rd way, but it is more technical and requires the command line and UNIX commands (yep, there is UNIX inside Windows)
Procedure 1:
Open Arduino IDE & plug in Board.
Tools, Board, Select Arduino Board.
Tools, Port, Select COM3 because DFU is not an option
Upload Sketch & error.
Procedure 2:
Quickly double-press the reset button to enter bootloader, the orange LED starts to fade in and out, quickly press upload & error.
Other Computer
Unplug USB from laptop, move over to desktop, plug in, select board, upload a sketch & it works.
I believe the errors happen because of some configuration setting on my laptop or drivers. I do not understand why I keep getting the error when the device appears as a normal com port via method 1, and works on the desktop perfectly fine.
The last screen shows it worked in DFU mode. Use that computer to try to get it to normal mode.
No configuration on the laptop or drivers involved; that board is one of a few that have this duality that I hate.
Since you obviously have not read the documentation, I am moving on and will leave you to 'play'.
You are correct, I have not read the documentation about this topic, I don't know where it is. All I can find when I search for my issues are forum posts so I thought to make one. If you could share a link a link for where I can go to read and teach myself, it would be appreciated.
It's all here on the Arduino.cc website. If you are new to the layout and navigation, it can be confusing. But before I go on, have you noticed that at the bottom of your thread, there are suggested posts that may help. It looks like the following. Maybe more than one, check them out.
Before I show you where the docs are, let me point out that many have criticized the quality of the docs. I find them sometimes excellent but often strangely organized and sometimes horrible.
Here is the big picture. At
arduino.cc you will see, then select Documentation and see now click on Go TO DOCUMENTATION (or Hardware). I am sure you can figure it out from there.
then select
Sorry, I think some screen grabs are in the wrong order.
Big picture is go to web site with weird format arduino.cc
You will see this
Click on Documentation and you will see the following
Now click either GO TO DOCUMENTATION or Hardware.
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