So just scan through the entire FFT spectrum, looking for the first peak (even if it is not the largest).

Just a few hours ago, the new Arduino ESP32 library, based on based on ESP-IDF v5.5.1, was released:
https://newreleases.io/project/github/espressif/arduino-esp32/release/3.3.2
I installed it immediately, and testing my program on in right now.

UPDATE:
Now it works properly. It gives readings every ...

The sensor’s ODR is set to 1600, since it cannot be configured to 1024. Could this also be causing some delay or advance in the signals?

If the sensor is sample rate generator itself, it may cause errors. But not delay or advance, but the sample rate variations. The delay or advance is only a ...

This means you allocate 4 buffers of 512 bytes each. Note that a buffer is only available for reading if it's entirely filled by the DMA subsystem, not earlier.

Thank you for the explanation.
I misunderstood the meaning of this parameter. I thought it was the length of the DMA single transfer ...

No, no, no. My requirements are very modest. I have a very low sampling frequency of 8000 Hz.
The buffer is 512 B size, but I want to read it when it reaches 128 B. That is, when there is still 384 B of free space left, so plenty of time to read those 128 B before the buffer overflows.
There should ...

Hello.
I have huge problems with I2S in ESP32, both in "driver/I2S.h" or "ESP_I2S.h" library.
I need something looks simple: receiving samples in master mode using pooling in main loop, but without blocking.
But examples from internet not work as I expect.
For example, the simple code:
#include ...

Are you saying that the address provided in the UART terminal by the ESP module is not the correct address?
Also IP scanner confirms that this module responds at that address.
If this address is not valid, where can I find the correct one?

Thanks for reply.

Enter rtsp://192.168.2.57:554/
or, if that fails:
rtsp://192.168.2.57:554/mjpeg/1
rtsp://192.168.2.57:554/stream

VLC doesn't want to connect at any of these addresses.

Hello.
I need connect ESP32-CAM to CCTV recorder, so I need RTSP server, not the popular HTTP one.
I also used the HTTP version, and it worked well (of course only in browser, not with the CCTV recorder). So module itself is electrically fine.
But now I need RTSP, so I'm trying to use example ...

This was not an issue, but Your answer directed me to something else.
Order of argument is different.
In ESP-IDF 5.1, address must be third parameter, not the second one as in ESP-IDF 4.4.
This code compiles without errors:
esp_flash_read(esp_flash_default_chip, (uint32_t*)FLASH_Buffer, 0x003FF000 ...