Many anonymous posters (not logged in) try to add unrelated questions and information to other people's tickets. This is likely to a large degree because anonymous users are not allowed to create new tickets. Instead of posting in other people's tickets, they are welcome to post here. Anonymous posts are still subject to moderation.
Please provide this information in your bug report, otherwise we cannot help you:
All information like output from dfu-util must be copy-pasted or attached as text, only in very rare cases a screenshot (png) would be appropriate and please avoid photos. Do not touch Milestone/Status/Owner/Labels fields.
Note if dfu-util reports "No DFU capable USB device available" there is a 99% chance the error lies in your "microcontroller development" GUI / Arduino IDE or the device bootloader setup, and there is nothing dfu-util can do about it. In this case please consider reporting the bug in the appropriate channels and forums and not here.
Anonymous
dfu-util 0.10-dev
Copyright 2005-2009 Weston Schmidt, Harald Welte and OpenMoko Inc.
Copyright 2010-2021 Tormod Volden and Stefan Schmidt
This program is Free Software and has ABSOLUTELY NO WARRANTY
Please report bugs to http://sourceforge.net/p/dfu-util/tickets/
dfu-util: Warning: Invalid DFU suffix signature
dfu-util: A valid DFU suffix will be required in a future dfu-util release
dfu-util: Cannot open DFU device 2341:035b found on devnum 7 (LIBUSB_ERROR_ACCESS)
dfu-util: No DFU capable USB device available
Failed uploading: uploading error: exit status 74
Salut. c'est ma première fois j'utilise l'arduino portenta H7 et quand je téléverse un programme pour pour test j'ai ce message d'erreur. j'ai fait les configuration nécessaire niveau carte. mon problème semble être lié à mon port, j'utilise un système d'exploitation linux Unbutu
You must create a udev rules file so that the device 2341:035b gets tagged with "uaccess". Please see examples in https://sourceforge.net/p/dfu-util/dfu-util/ci/master/tree/doc/60-dfuse.rules
Sketch uses 285877 bytes (9%) of program storage space. Maximum is 3145728 bytes.
Global variables use 30732 bytes (9%) of dynamic memory, leaving 296948 bytes for local variables. Maximum is 327680 bytes.
dfu-util 0.11-arduino4
Copyright 2005-2009 Weston Schmidt, Harald Welte and OpenMoko Inc.
Copyright 2010-2021 Tormod Volden and Stefan Schmidt
This program is Free Software and has ABSOLUTELY NO WARRANTY
Please report bugs to http://sourceforge.net/p/dfu-util/tickets/
No DFU capable USB device available
Failed uploading: uploading error: exit status 74
this is for Nano ESP32 using Arduino IDE
As explained in the description:
Note if dfu-util reports "No DFU capable USB device available" there is a 99% chance the error lies in your "microcontroller development" GUI / Arduino IDE or the device bootloader setup, and there is nothing dfu-util can do about it. In this case please consider reporting the bug in the appropriate channels and forums and not here.