#include <Adafruit_SSD1306.h>
#include <Wire.h>

#define PIN_QUIET  4
#define PIN_MODERATE    6
#define PIN_LOUD   23
#define SENSOR_PIN 26

#define SCREEN_WIDTH 128 // OLED display width, in pixels
#define SCREEN_HEIGHT 32 // OLED display height, in pixels
#define OLED_RESET     -1 // Reset pin # (or -1 if sharing Arduino reset pin)
#define SCREEN_ADDRESS 0x3D ///< See datasheet for Address; 0x3D for 128x64, 0x3C for 128x32
Adafruit_SSD1306 display(SCREEN_WIDTH, SCREEN_HEIGHT, &Wire, OLED_RESET);


const int sampleWindow = 50;
unsigned int sample;


void setup() {
  // put your setup code here, to run once:
  Serial.begin(115200);
  Serial.println("Hello, ESP32!");
  
  // pinMode(PIN_LOUD, OUTPUT);
  // pinMode(PIN_MODERATE, OUTPUT);
  // pinMode(PIN_QUIET, OUTPUT);

  // digitalWrite(PIN_LOUD, HIGH);
  // digitalWrite(PIN_MODERATE, HIGH);
  // digitalWrite(PIN_QUIET, HIGH);

 if (!display.begin(SSD1306_SWITCHCAPVCC, 0x3C)) {
    Serial.println(F("SSD1306 allocation failed"));
    for (;;); 
 }

  display.clearDisplay();
  display.setTextSize(2);
  display.setTextColor(WHITE);
  display.display();


}

void loop() {
  // put your main code here, to run repeatedly:
   unsigned long startMillis = millis();                  
  float peakToPeak = 0;                                  
  unsigned int signalMax = 0;                            
  unsigned int signalMin = 4095;                         
  // collect data for 50 mS
  while (millis() - startMillis < sampleWindow)
  {
    sample = analogRead(SENSOR_PIN);
    //Serial.println(sample);
  }
  if (sample <= 2000)
  {
    digitalWrite(PIN_QUIET, HIGH);
    digitalWrite(PIN_MODERATE, LOW);
    digitalWrite(PIN_LOUD, LOW); 
    display.clearDisplay();
    display.setCursor(0, 1);
    display.print("Level:Quite");
    display.display();
  }
  else if ((sample > 2000) && (sample <= 3000))
  {
     digitalWrite(PIN_QUIET, LOW);
     digitalWrite(PIN_MODERATE, HIGH);
     digitalWrite(PIN_LOUD, LOW); 
     display.clearDisplay();
     display.setCursor(0, 1);
     display.print("Level:Moderate");
     display.display();
  }
  else
  {
     digitalWrite(PIN_QUIET, LOW);
     digitalWrite(PIN_MODERATE, LOW);
     digitalWrite(PIN_LOUD, HIGH); 
     display.clearDisplay();
     display.setCursor(0, 1);
     display.print("Level:Loud");
     display.display();
  }

  delay(200);

}