ESP32 Forum

Hey,

I've been using Arduino IDE and an ESP32 board this few last days and I just run into some trouble.

I was compiling and uploading sketches successfully and without any errors when suddenly an upload error appeared.

The error is the following:

"A fatal error occurred: Failed to connect to ESP32: Wrong boot mode detected (0xb)! The chip needs to be in download mode.
Or
the selected serial port does not exist or your board is not connected"

Also take a look at this:
image
image
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I'd really appreciate any help!!!

I can't see the images, but you likely have some of the strapping GPIO pins connected to something that puts the chip in the wrong boot mode.