IDE 2.1.1 now allows me to upload sketches to an Uno R4 WiFi, but I still cannot upload sketches to a Minima. For a simple sketch that uploads fine to an R4 WiFi I get the following error message on the Minima: Sketch uses 33716 bytes (12%) of program storage space. Maximum is 262144 bytes. Glob…

I had this issue but when i ran C:....\AppData\Local\Arduino15\packages\arduino\hardware\renesas_uno\1.0.1\drivers\dpinst-amd64.exe as an administrator I was able to upload sketches. Hope this helps and thanks @ubidefeo and extended arduino team for this cool microcontroller.

Hi @ubidefeo - I am using a standard Dell Precision 5540 laptop with Windows 10 and no restrictions that I am aware of. When I double tapped the reset button the Minima status changed to disconnected and a Windows Notification popped up saying 'Setting up a Santiago'. Trying to upload a sketch pro…

@flynace , try manually running dpinst-amd64.exe as suggested by @the2ndtierney Were you part of the preview users group?

Hi all, I have followed instructions of @the2ndtierney but without success. I have reinstalled Arduino last version 2.1.1 CLI 0.32.3 but a COM port associated to Arduino R4 MINIMA doesn't appear.

My issue also appears to be a permissions problem - thank you @the2ndtierney ! My user account did not have the authority to install the DFU USB drivers. So even though the installation of R4 core appeared to succeed after I entered my password to modify system files, the actual installation faile…

I know this isn't a Windows fix, but I had the same issue under Linux (Fedora) and finally fixed this with the following code: # UDEV Rules for Arduino UNO R4 boards # # This will allow reflashing with DFU-util without using sudo # # This file must be placed in: # # /etc/udev/rules.d # # Afte…

@GreyLimit Thank you. This solution worked on my Ubuntu workstations :slight_smile:

Apparently like many others, code won't upload to my R4 MINIMA from my WIndows 10 desktop. In Device Manager "Other Devices" I see DFU-RT Port and in Ports I see USB Serial Device (COM13), which is the port that shows up under the IDE "Tools--> Port tab When I try to upload it says no DFU capable d…

@brooksdr if on Win 10 you're having trouble running the driver installer it might be a permission issue. Can you try right-click the installer and choose "Run as Administrator"? It will request for your system's password. These system changing programs have to be installed by a system admin

Well, I tried that and this is what I get (a message no different than when I tried to run it not as an administrator): [image]

DFU Error - Cannot Upload Sketch to R4 Minima

Official Hardware UNO Family UNO R4 Minima

Topic		Replies	Views
Unable to upload to Uno R4 Minima UNO R4 Minima	14	740	September 28, 2025
Upload failed to R4 Minima on Windows 11 UNO R4 Minima	6	80	July 16, 2026
Uno R4 Minima: upload fails with Cannot open DFU device Uploading	5	1832	February 16, 2025
DFU-port not working for Arduino Uno and Arduino Uno R4 minima UNO R4 Minima	25	8770	June 4, 2024
Problem uploading to board UNO R4 WiFi	21	7951	March 23, 2024

DFU Error - Cannot Upload Sketch to R4 Minima

Related topics