#define PIN_TO_SAMPLE A0
#define LED_PIN_OVERVOLT 2

#define SAMPLE_TIME_US 22.72   //IN MILLISECONDS FOR DEBUG PURPOSES
#define NUM_OF_SAMPLES 50
#define MAX_MEAN_MV 2000

  float voltage;
  float somma=0;
  float num_media=1;
  float frequenza = (1 / (float)SAMPLE_TIME_US)* 1000;

  float perform_acquisition(){
  int ADRES;
  float value_mv;   //in mV


  ADRES=analogRead(PIN_TO_SAMPLE);
  value_mv=(ADRES*(5.0/1024.0))*1000.0; //ADC has n=10bit, FSR=5V
  return(value_mv);
  }

void setup(){

  pinMode(PIN_TO_SAMPLE, INPUT);
  pinMode(LED_PIN_OVERVOLT, OUTPUT);
  Serial.begin(9600);
  Serial.println("Welcome to our Soundbar project.");
  Serial.println("Sampling on pin 2.");
  Serial.print("Sampling frequency on @ ");
  Serial.print(frequenza);
  Serial.print("kHZ");
  Serial.println();
  delay(4000);
}

void loop(){
  voltage=perform_acquisition();

  Serial.print(voltage);
  Serial.println("mV");
  //delay(SAMPLE_TIME_US);
  delayMicroseconds(SAMPLE_TIME_US);
   float media=(somma + voltage)/num_media;
   somma=somma+voltage;
   num_media++;
   Serial.print("La media è: ");
   Serial.print(media);
   Serial.println();
   if(media>MAX_MEAN_MV){
      digitalWrite(LED_PIN_OVERVOLT, HIGH);
   }
   else{
    digitalWrite(LED_PIN_OVERVOLT, LOW);
   }
}