Unable to upload code to custom ESP32

[PepitoGrillo]

I have made a custom-made PCB, using an ESP32 as its main brain. I have copied nearly all the schematics refearing to the USB-UART converter from this board:

https://docs.espressif.com/projects/esp ... vkitc.html

When I try to upload some dummy code using the Arduino IDE, I keep getting this Connecting... message until a timeout missage appears. It doesn't matter if I press the buttons or not, it is unable to connect.

Code: Select all

esptool.py v3.0-dev
Serial port COM8
Connecting........_____....._____....._____....._____....._____....._____....._____

A fatal error occurred: Failed to connect to ESP32: Timed out waiting for packet header

Additional to these schematics, I also have a pair of LED, connected to both RX-TX and TX-RX. Eventually, they blink as if some data is being sent.

Am I missing something? What other validations should I get?

Thanks!