As WiFive said, Gpio12 must be pulled down at startup.

THANK YOU MUCH, you're right.
I am really stupid because I had read that on the datasheet but I had not made the connection between MTDI and GPIO12.
Everything is working properly!

Here is the part to lower the code. And here is what I have as a message on the COM port (normal mode): rst: 0x1 (POWERON_RESET), boot: 0x33 (SPI_FAST_FLASH_BOOT) flash read err, 1000 ets_main.c 371 ands Jun 8 2016 00:22:57 rst: 0x10 (RTCWDT_RTC_RESET), boot: 0x33 (SPI_FAST_FLASH_BOOT) flash read er...

Hello and thank you for your answer.
No nothing is connected to GPIO6-> GPIO11.
see diagram. I do not know what to do anymore.
Thanks for your help

Hello I have a download problem with a ESP32 WROOM. l connects well but seems not to detect FLASH. Here is the error message. I check everything, change the ESP but still the same. Do you have an idea. thank you in advance Archiving built core (caching) in: C:\Users\Luc\AppData\Local\Temp\arduino_ca...