So it's better to leave it as it is and not force it with CONFIG_ESPTOOLPY_FLASHMODE="qio" like I was doing ?

I have a ESP32-WROVER-E N8R8. Is there some documentation where I can find the parameters of my module... ? Like those for Flash and PSRAM...

I did the following test. I went into menuconfig and chose Flash SPI Mode: DOUT. I saved and then checked the sdkconfig file. And both options were changed accordingly:
CONFIG_ESPTOOLPY_FLASHMODE_DOUT=y
CONFIG_ESPTOOLPY_FLASHMODE="dout"
Then I changed in menuconfig to QIO, saved and then in ...

I added 1uF capacitor between the EN pin and ground and now it works perfectly ! Thanks !
Why do yo not include it on the board ?

I've done some testing...

I usesd in esptool.cfg "custom_reset_sequence = D1|W3|D0|W3". Just to see if the signals are present and they have correct polarity.
When I executed "esptool flash_id", the level at IO0 (boot) pin indeed goes from HIGH to LOW and back, while the EN pin stays HIGH.

Then I ...

Yes ! It works every time, with any version, if I press and hold the BOOT button while esptool tries to connect.

Hi,

If I use the esptool to access something on my ESP32 device (like " esptool flash_id "), it fail and says it cannot connect because the device cannot be switched to bootloader mode. A few times it worked, but most of the time it fails with this error:


esptool.py v4.8.1
Serial port COM3 ...