ESP32 WROVER-E PDM interface for MP34DT05 microphone

[ozgbostan]

Hi,

I have designed a custom board based on ESP32 WROVER-E module which is going to be used for EdTech to teach the fundamentals of electronics, embedded programming, AI and IoT.

A critical point is that, I am planning to use PDM based microphone by ST, MP34DT05, however, one of the technical guys at Espressif indicated that ESP32 does not have PDM interface. But when I searched through various sources (forums, github projects, datasheets, technical notes, ESP32 libraries), it is considered that PDM microphones can be used with I2S interface of ESP32.

For that purpose, to get rid of the doubts in my mind, I would like to ask and be sure that whether it is possible to use PDM based microphones with I2S interface of ESP32.

Thanks in advance for your help and assistance.

[ESP_Sprite]

The ESP32 hardware and the ESP-IDF driver should support PDM mode from what I can see, however I haven't used it myself.

[ozgbostan]

Anyone who has experinced the PDM interface?