Hi,
we are currently testing a board based on an ESP32-pico module (on-module pcb antenna) in an accredited lab for CE certification.
Our board is very simple, it only has a CAN transceiver a DCDC buck converter and the ESP32-Pico module.
It is a 4 layers board with solid GND and PWR and apertures ...

I tryied soldering a very thin wire from the unconnected pin to 3,3V but it doesn't change.
Admittedly soldering a qfn pin to a wire is not that easy, under the microscope it seems ok but I may have made a bad joint...

I see thanks.
Do you think that not powering RTC may make the Pico unable to work properly?

Hi,
- yes 3.3V stable
- no feedback in a terminal when resetting the board

Hi folks, I'm developing a custom Pico D4 board which has been prototyped.
Problem is that there is no communication with Pico, the CP2104 becomes visible but it is impossible to flash it:

Connecting........_____....._____....._____....._____....._____....._____....._____
A fatal error occurred ...