/*
Project Arduino Uno Sensor Pendeteksi Kebocoran Gas
*/
int gasSensorPin = A0;
int gasThreshold = 1;
int buzzerPin = 7;
int ledMerah = 8;
int ledKuning = 9;
int ledHijau = 10;

void setup() {
  Serial.begin(9600);
  pinMode(buzzerPin, OUTPUT);
  pinMode(ledMerah, OUTPUT);
  pinMode(ledKuning, OUTPUT);
  pinMode(ledHijau, OUTPUT);

  digitalWrite(buzzerPin, LOW);
  digitalWrite(ledMerah, LOW);
  digitalWrite(ledKuning, LOW);
  digitalWrite(ledHijau, LOW);
}

void loop() {

  int gasValue = analogRead(gasSensorPin);

  Serial.print("Gas Value: ");
  Serial.println(gasValue);

  if (gasValue == 0) {
  Serial.println("Tidak Terdeteksi Kebocoran Gas");
  noTone (buzzerPin);
} else {
  Serial. println("Terdeteksi Kebocoran Gas!");
  tone (buzzerPin, 1000);

  digitalWrite(ledMerah, HIGH);
  delay (500);
  digitalWrite(ledMerah, LOW);

  digitalWrite(ledKuning, HIGH);
  delay (500);
  digitalWrite(ledKuning, LOW);

  digitalWrite(ledHijau, HIGH);
  delay (500);
  digitalWrite(ledHijau, LOW);

  noTone (buzzerPin);
}

delay (1000);
}