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#217 No DFU capable USB device available
dWarning: Invalid DFU suffix signature
A valid DFU suffix will be required in a future dfu-util release
No DFU capable USB device available
fu-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/
Failed uploading: uploading error: exit status 74
Discussion
Anonymous
Without more information there is not much we can do about it.
I have same issue:
Warning: Invalid DFU suffix signature
A valid DFU suffix will be required in a future dfu-util release
Cannot open DFU device 2341:0366 found on devnum 34 (LIBUSB_ERROR_NOT_FOUND)
No DFU capable USB device available
Failed uploading: uploading error: exit status 74
This system is out of the box and not operating for sketch upload.
This means the device shortly showed up, but then disappeared before dfu-util could connect.
I have the same problem. Using system information on macOS to see USB device details, this board used to work with USB device name "Nano ESP32" and manufacturer "Arduino". Now I get an error and it has the name "USB JTAG/serial debug unit" and manufacturer "Espressif". Below is the output while trying to upload using the Arduino IDE:
Sketch uses 690741 bytes (21%) of program storage space. Maximum is 3145728 bytes.
Global variables use 55048 bytes (16%) of dynamic memory, leaving 272632 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/
dfu-util: No DFU capable USB device available
Failed uploading: uploading error: exit status 74