/*
Project Arduino Uno Sensor Pendeteksi Kebocoran Gas
*/
#include <LiquidCrystal_I2C.h>

LiquidCrystal_I2C lcd(0x27,16,2);

int gasSensorPin = A0;
int gasThreshold = 1;
int buzzerPin = 7;
int ledMerah = 8;
int ledHijau = 10;

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

  digitalWrite(buzzerPin, LOW);
  digitalWrite(ledMerah, LOW);
  digitalWrite(ledHijau, LOW);
  lcd.init();
  lcd.backlight();
  lcd.setCursor(0,0);
  lcd.print("Tugas TIK - ADIB");
  lcd.setCursor(3,1);
  lcd.print("Gas Bocor");
  delay(1000);
  lcd.clear();
}

void loop() {
  lcd.init();
  lcd.backlight();

  int gasValue = analogRead(gasSensorPin);

  Serial.print("Gas Value: ");
  Serial.println(gasValue);
  lcd.setCursor(0,0);
  lcd.print("Info  :");
  lcd.setCursor(0,1);
  lcd.print("Nilai :");
  lcd.setCursor(13,1);
  lcd.print("ppm");

  if (gasValue <= 200) {
  Serial.println("Tidak Terdeteksi Kebocoran Gas");
  lcd.setCursor(8,0);
  lcd.print("Aman");
  lcd.setCursor(8,1);
  lcd.print(gasValue);
  noTone (buzzerPin);
  digitalWrite(ledHijau, HIGH);
  digitalWrite(ledMerah, LOW);
} else {
  Serial. println("Terdeteksi Kebocoran Gas!");
  lcd.setCursor(8,0);
  lcd.print("Bocor");
  lcd.setCursor(8,1);
  lcd.print(gasValue);

  tone (buzzerPin, 1000);

  digitalWrite(ledMerah, HIGH);
  digitalWrite(ledHijau, LOW);

  noTone (buzzerPin);
}
delay (100);
}