Had trouble figuring exactly which pins to connect I2S microphone to the particular ESP32 board.
 | INMP441 microphone |
 | NODEMCU-32 V1.3 2821 |
Below is the pin map for translating microphone pins to ESP32 board pins.
| Microphone | NODEMCU |
| GND | GND |
| VDD | 3V3 |
| SD | P23 |
| SCK | P18 |
| WS | P19 |
| L/R | GND |
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