New ADC ES32 accuracy

[vanirw]

Hi,
I read that ESP32 has accuracy issue about their ADC. But from this link bellow, it tell us that ESP32 since 2021.11 has new ADC that more accurate. Is that true? and how do i know which ESP32 product that produced after 2021.11 ?

https://esphome.io/components/sensor/ad ... ce-2021-11

Thank You.
Vani RW

[Sprite]

The ADC actually didn't change, we incorporated calibration values measured in the factory and stored in eFuses and curve fitting in ESP-IDF that compensates the shortcomings of the hardware. For a given ESP, you can run 'esptool.py adc_info' to see if the ESP32 actually has that calibration info.