#include <Adafruit_SSD1306.h>

#define PIN_QUIET  21
#define PIN_MODERATE    22
#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_MOSI   9
#define OLED_CLK   10
#define OLED_DC    11
#define OLED_CS    12
#define OLED_RESET 13

Adafruit_SSD1306 display(SCREEN_WIDTH, SCREEN_HEIGHT,
  OLED_MOSI, OLED_CLK, OLED_DC, OLED_RESET, OLED_CS);

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); 
  }
  else if ((sample > 2000) && (sample <= 3000))
  {
     digitalWrite(PIN_QUIET, LOW);
     digitalWrite(PIN_MODERATE, HIGH);
     digitalWrite(PIN_LOUD, LOW); 
  }
  else
  {
     digitalWrite(PIN_QUIET, LOW);
     digitalWrite(PIN_MODERATE, LOW);
     digitalWrite(PIN_LOUD, HIGH); 
  }

  delay(200);

}