ESP32 Forum

Posted: **Sat Aug 19, 2023 9:19 pm**

Hi everyone,

I'm trying to flash some firmware over DFU on the ESP32-S3-DevKitC-1, but I'm unable to do this, I keep getting

Code: Select all

No DFU capable USB device available
CMake Error at C:/esp/esp-idf-master/esp-idf/tools/cmake/run_dfu_util.cmake:27 (message):
  dfu-util failed

I've managed this before on the ESP32-S2 without any issues, but I'm not getting there with the ESP32-S3 and I need some help.

Flow:

Connect devkit with good USB cable (on USB marked port, not the UART port)

I put the device in boot mode (toggle reset while pressing boot)

Checked the drivers for the interfaces for with Zadig (both WinUSB v6.1.1.7600)

Run idf.py dfu-flash

The documentation mentions something about burning a fuse, but as I understand this, this isn't necessary?
Any ideas are highly appreciated !

IDF-version: master branch v5.2
System: Windows

Posted: **Mon Aug 21, 2023 7:14 pm**

Anybody?

Posted: **Tue Aug 22, 2023 1:27 am**

You do indeed need to burn that fuse, otherwise you're talking to the USB-serial-JTAG peripheral.

Posted: **Tue Aug 22, 2023 6:51 am**

Thank you for your response.

I'm trying to burn the eFuse now, but I'm not able to run the espefuse.py tool on the USB-Port... (when board in runtime and in boot mode).
I am able to run this tool when I connect to the UART-USB-Port, but I don't want that because my custom boards do not have an on board USB-to-UART bridge.

When connecting to the USB-port I see the following behavior:

In runtime mode, showing up as COM23, I am able to see serial output via vsCode and via Putty

In runtime mode, showing up as COM23, I am not able to run espefuse.py:

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A fatal error occurred: Failed to connect to Espressif device: No serial data received.

In boot mode, showing up as Universal Serial Bus Devices (no COM port), I am not able to see any serial output because I don't have a valid COM port

Output:

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C:\Users\USER\esp\projects\hello_world>espefuse.py --port COM23 summary
espefuse.py v4.7.dev1
Connecting......................................

A fatal error occurred: Failed to connect to Espressif device: No serial data received.
For troubleshooting steps visit: https://docs.espressif.com/projects/esptool/en/latest/troubleshooting.html
Please make sure that you have specified the right port with the --port argument

As always, any tips are very welcome.

Posted: **Wed Aug 23, 2023 7:44 pm**

So I got it working, but not on my laptop.

I've connected the same device on a different laptop and there it worked without any problem:

Connected the USB port and put the device in boot mode

A COM port appeared on the device manager

Flashed the eFuse without any problems

Managed to upload the firmware with DFU

I guess there is something wonky with the drivers on my original laptop.
For reference, the drivers listed on the working laptop before flashing the eFuse were:

Interface 0 - usbser (v10.0.18362.1)

Interface 2 - WINUSB (v10.0.18362.1)

After burning the eFuse:

Interface 0 - usbser (v10.0.18362.1)

Interface 2 - (NONE)

Next I configured the WinUSB driver for interface 2 with Zadig, then I was able to flash the firmware with DFU.

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