Adafruit MEMS Microphone or respeaker Array With Arduino or esp32

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Here is my simple question.
Can I use Adafruit I2S MEMS Microphone Breakout OR Respeaker Mic array With anyone of them (Arduino or esp32).
If Yes, then How

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For the I2S microphone, use an MCU with an I2S port. ESP32 is one example.

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I discussed this with my buddy, and we came up with this approach; however, please note that the code has not been checked or tested yet:

Yes, you can use both the Adafruit I2S MEMS Microphone Breakout and the ReSpeaker Mic Array with Arduino or ESP32. Below is an explanation of how you can connect and use each microphone module with either platform.

1. Adafruit I2S MEMS Microphone Breakout (SPH0645LM4H)

How It Works:

The Adafruit I2S MEMS Microphone uses the I2S (Inter-IC Sound) protocol, which allows digital audio data transfer. I2S microphones require three main connections: clock, data, and a word select line.

Connecting to Arduino (with I2S support) or ESP32:

For the Arduino platform, only some boards (like Arduino Zero) support I2S directly, but the ESP32 natively supports I2S communication.

Connections:

  • VIN: Connect to 3.3V or 5V.
  • GND: Connect to ground.
  • BCLK (Bit Clock): Connect to ESP32 GPIO 26 (or a specified I2S clock pin).
  • DOUT (Data Out): Connect to ESP32 GPIO 25 (or a specified I2S data pin).
  • LRCL (Word Select): Connect to ESP32 GPIO 22 (or a specified I2S word select pin).

ESP32 Code Example:

#include <driver/i2s.h>

void setup() {
  Serial.begin(115200);

  // Configure the I2S peripheral
  i2s_config_t i2s_config = {
    .mode = I2S_MODE_MASTER | I2S_MODE_RX,
    .sample_rate = 16000,
    .bits_per_sample = I2S_BITS_PER_SAMPLE_32BIT,
    .channel_format = I2S_CHANNEL_FMT_ONLY_LEFT,
    .communication_format = I2S_COMM_FORMAT_I2S_MSB,
    .intr_alloc_flags = ESP_INTR_FLAG_LEVEL1,
    .dma_buf_count = 8,
    .dma_buf_len = 64,
    .use_apll = false,
    .tx_desc_auto_clear = false,
    .fixed_mclk = 0
  };

  // Pin configuration
  i2s_pin_config_t pin_config = {
    .bck_io_num = 26,   // BCLK
    .ws_io_num = 22,    // LRCL
    .data_out_num = I2S_PIN_NO_CHANGE,
    .data_in_num = 25   // DOUT
  };

  // Install and start I2S driver
  i2s_driver_install(I2S_NUM_0, &i2s_config, 0, NULL);
  i2s_set_pin(I2S_NUM_0, &pin_config);
}

void loop() {
  int32_t sample;
  size_t bytes_read;
  i2s_read(I2S_NUM_0, &sample, sizeof(sample), &bytes_read, portMAX_DELAY);

  if (bytes_read > 0) {
    Serial.println(sample);
  }
}

2. ReSpeaker Mic Array

How It Works:

ReSpeaker Mic Array also communicates using I2S, but it comes with additional features such as multiple microphones for beamforming, noise reduction, and other DSP (Digital Signal Processing) features.

Connecting to Arduino (with I2S support) or ESP32:

The connection is similar to the Adafruit I2S MEMS Microphone, but the exact GPIO pins might vary depending on your ReSpeaker Mic Array model.

Connections (ESP32 Example):

  • 3.3V/5V: Connect to VIN.
  • GND: Connect to ground.
  • BCLK: Connect to ESP32 GPIO 26.
  • LRCL: Connect to ESP32 GPIO 22.
  • DOUT: Connect to ESP32 GPIO 25.

Note: Ensure to check the specific documentation of your ReSpeaker Mic Array for accurate pin mapping.

Code Usage: You can use similar code as shown for the Adafruit I2S microphone, adapting it for the input channels and any specific audio processing features provided by the ReSpeaker.

Key Points:

  • Ensure that your microcontroller's I2S peripheral is configured correctly.
  • The ESP32 is preferred due to native I2S support, whereas standard Arduinos may have limited support.
  • Confirm that the I2S pins used are compatible with your chosen module and microcontroller.
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So I can use both of them directly with esp32

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