So, thanks for the consultation, I am satisfied

So, in the absence of an external crystal 40MHz, it is impossible to read the chip ID? The internal 8 MHz generator does not support the serial port?

When power is supplied, there is no message in the monitor.
After a hardware reset, there is no message in the monitor.
No response to TX
Power supply: 3.3v/0.6a
Adapter: CP2102
I bought 25 chips, assembled 3 identical devices - all three are silent.
I can't figure out what I'm doing wrong.
Sketches ...

Hi all,
i use the code from the example

/*
* LAB: 10
* Name: ESP32 ADC Calibration
* Author: Khaled Magdy
* For More Info Visit: www.DeepBlueMbedded.com
*/

#include "esp_adc_cal.h"

#define AN_Pot1 37

int AN_Pot1_Result = 0;
float Voltage = 0.0;

void setup()
{
Serial.begin(115200);
}

void ...

IO2 is pulled up, you will need it low to program successfully

Merci !!
Damn it - I spent 3 days until I came across information about .
Espressif can be proud - the module withstood 6 solderings with a hot air gun))

I am using a quarter wave antenna. I believe - it can be connected directly to ESP32­_PICO_­D4

ESP32­_PICO_­D4
I use a 1/4L antenna. Do I need an additional balun, or can it be connected directly to the module?
thanks for the information