This product is a MEMS digital microphone board in a D1 Mini32 form factor utilizing the InvenSense ICS-43432 MEMS audio sensor. The complete ICS-43432 solution consists of a MEMS sensor, signal conditioning, an analog-to-digital converter, decimation and anti-aliasing filters, power management, and an industry standard 24-bit I²S interface. The ICS-43432 has a high SNR of 65 dBA and a wideband frequency response. The sensitivity tolerance of the ICS‐43432 is ±1 dB, which enables high-performance microphone arrays.

The board is in a single-row D1 Mini32 form factor, also has input power filtering from the 3.3v supply compatible with the standard ESP32 D1 Mini32 board, and WLED specific boards such as the QuinLED-ESP32 board used on the QuinLED-Dig-Uno and QuinLED-Dig-Quad, and the Shields and more ESP32 WROOM USB-C D1 Mini32, as well as the ESP32 and more ESP32 WLED Four Channel Controller.

Fully compatible with WLED Sound Reactive Version and ESPhome I2C Audio Microphone Platform using standard GPIO pins. Can also be used with other WLED board that expose the ESP32 GPIO pins.

Specifications:

• Digital I²S Interface with High Precision 24‐bit Data
• High 65 dBA SNR
• −26 dB FS Sensitivity
• ±1 dB Sensitivity Tolerance
• Wide Frequency Response from 50 Hz to 20 kHz
• Low Current Consumption: 1.0 mA
• High Power Supply Rejection: −80 dB FS
• 116 dB SPL Acoustic Overload Point
• PCB board power supply filter for improved noise rejection
• I/O: WS -> GPIO18, SD -> GPIO19, SCK -> GPIO23