I tried flashing it both with ESP-IDF and Arduino. In both cases the error was timeout. When I reset putting IO0 to GND and pressing enable nothing is sent by the ESP32 via UART (nothing seen on serial terminal nor in the TX Pin using an oscilloscope).

I have developed a custom PCB board for a personal project which I had assembled in China via JLCPCB. I have problems programming the board via UART using a CP2102 board. I have tested strapping pins: * GPIO0: LOW (PCB pull-down) * GPIO2: LOW (PCB pull-down) * GPIO5: HIGH (internal pull-up) * GPIO12...

mspider65 wrote: Did You also received recently the pcb assembled from JLPCB?

I just received the pcb assembled from JLPCB and I have a similar problem with my ESP32 Pico D4 Custom PCB. Is there a problem with JLPCB?

Is there a way to get the default UUID of the device?

For example the mac I can get default mac using esp_read_mac if no mac was set.