Coding Pendeteksi Asap Berbasis Arduino Uno R3

Coding untuk pendeteksi asap berbasis arduino uno

//pendeteksi//asap//berbadis//arduino//

const int led_hijau = 12;
const int buzzer = 11;
const int sensor = 0;
const int BATAS = 90;

int length = 15; // the number of notes
char notes[] = "ccggaagffeeddc "; // a space represents a rest
int beats[] = { 1, 1, 1, 1, 1, 1, 2, 1, 1, 1, 1, 1, 1, 2, 4 };
int tempo = 300;

void playTone(int tone, int duration) {
  for(long i = 0; i < duration * 1000L; i += tone * 2) {
    digitalWrite(buzzer, HIGH);
    delayMicroseconds(tone);
    digitalWrite(buzzer, LOW);
    delayMicroseconds(tone);
  }
}

void playNote(char note, int duration) {
  char names[] = { 'c', 'd', 'e', 'f', 'g', 'a', 'b', 'C' };
  int tones[] = { 1915, 1700, 1519, 1432, 1275, 1136, 1014, 956};

  // play the tone corresponding to the note name
  for (int i = 0; i < 8; i++) {
    if (names[i] == note) {
      playTone(tones[i], duration);
    }
  }
}

void setup()
{
  pinMode(led_hijau, OUTPUT);
  pinMode(buzzer, OUTPUT);
  Serial.begin(9600);
}

void loop()
{

  int a0 = analogRead(sensor);
  Serial.println(a0);
  if (a0 >= BATAS)
  {
    digitalWrite(led_hijau, HIGH);
    delay(500);
    digitalWrite(led_hijau, LOW);
    delay(500);

    for (int i = 0; i < length; i++) {
   if (notes[i] == ' ') {
        delay(beats[i] * tempo); // rest
      } else {
        playNote(notes[i], beats[i] * tempo);
      }

      // pause between notes
      delay(tempo / 1);
        }

    }
    else
      delay(500);
}

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