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#include <Wire.h>
#include <driver/i2s.h>

// I2S Microphone (INMP441) Pins
#define I2S_WS   15  // Word Select (L/R)
#define I2S_SD   32  // Serial Data (DOUT)
#define I2S_SCK  14  // Serial Clock

// LED Pin
#define LED_PIN 2  

// I2S Configuration
void setupMic() {
    i2s_config_t i2s_config = {
        .mode = (i2s_mode_t)(I2S_MODE_MASTER | I2S_MODE_RX),
        .sample_rate = 16000,  // Sample rate
        .bits_per_sample = I2S_BITS_PER_SAMPLE_16BIT,
        .channel_format = I2S_CHANNEL_FMT_ONLY_LEFT,
        .communication_format = I2S_COMM_FORMAT_I2S,
        .intr_alloc_flags = 0,
        .dma_buf_count = 8,
        .dma_buf_len = 64,
        .use_apll = false
    };

    i2s_pin_config_t pin_config = {
        .bck_io_num = I2S_SCK,
        .ws_io_num = I2S_WS,
        .data_out_num = I2S_PIN_NO_CHANGE,
        .data_in_num = I2S_SD
    };

    i2s_driver_install(I2S_NUM_0, &i2s_config, 0, NULL);
    i2s_set_pin(I2S_NUM_0, &pin_config);
}

void setup() {
    Serial.begin(115200);
    pinMode(LED_PIN, OUTPUT);
    setupMic();
}

void loop() {
    int16_t audio_data[64];  
    size_t bytes_read;

    // Read data from microphone
    i2s_read(I2S_NUM_0, &audio_data, sizeof(audio_data), &bytes_read, portMAX_DELAY);

    // Compute average volume level
    long sum = 0;
    for (int i = 0; i < 64; i++) {
        sum += abs(audio_data[i]);
    }
    int average = sum / 64;

    // Print the microphone data
    Serial.print("Mic Level: ");
    Serial.println(average);

    // Blink LED based on sound level
    if (average > 500) {  // Adjust this threshold if needed
        digitalWrite(LED_PIN, HIGH);
    } else {
        digitalWrite(LED_PIN, LOW);
    }

    delay(100);
}