Esp32S3 : Problem during Esp32S3 Flash using ESPTool

[ThomasESP32]

Good afternoon,

when flashing cards containing an Esp32S3 using ESPTool, I sometimes get an error.
Please see the picture in attachment.

Could you please tell me what can I do ?
Does it mean that the device has not been found on the COM Port ?

Best regards,

Thomas TRUILHE

[ujurmsde]

Is your device in boot mode? Have you pressed boot button when powering on the device?

[lbernstone]

The most likely cause of this issue is a bad cable. Make sure your cable is not folded or coiled. Lower the upload speed if you consistently have issues.
Esptool (and the flash tool you pictured) send a signal to attempt to set the device into download mode. If the device is stuck in a tight boot loop, it has no time available to process that signal (especially if using usb-cdc). You can hold the boot button (gpio0) low while plugging the device into USB to manually start download mode, then upload normally.

[ThomasESP32]

Because we are trying to flash a proprietary bord, there is no pusbutton in order to
set GPIO0 to ground.

The cable used is a "standard" smartphone USB-C cable.
Do you think it is a good idea if we try to flash the card with a shielded cable ??

Thank you for your help