#include <DHT.h>
#include <LiquidCrystal_I2C.h>

#define DHTPIN 15
#define DHTTYPE DHT22
DHT dht(DHTPIN, DHTTYPE);
#define mqPin (32) 
#define buzzer (25)

LiquidCrystal_I2C lcd(0x27, 16, 2);
int merah (18);
int hijau (5);

float suhu;
float kelembapan;

void setup() {
  Serial.begin(115200);
  dht.begin();
  pinMode(mqPin, INPUT);
  pinMode(merah, OUTPUT);
  pinMode(hijau, OUTPUT);
  lcd.init();
  lcd.backlight();
}

void loop() {
  float suhu = dht.readTemperature();
  float kelembapan = dht.readHumidity();
  int asap = analogRead(mqPin);


  Serial.print("Nilai Suhu Terbaca: " + String(suhu));
  Serial.print(" ");
  Serial.print("Nilai Kelembapan Terbaca: " + String(kelembapan));
  delay(500);
  Serial.print(" ");
  Serial.print("Output MQ-2: ");
  Serial.println(asap);


  if (asap > 1000)
  {
    digitalWrite(merah, HIGH);
    delay (200);
    digitalWrite(merah, LOW);
    delay (200);
    digitalWrite(merah, HIGH);
    delay (200);
    digitalWrite(merah, LOW);
    delay (200);
    digitalWrite(hijau, LOW);
    delay (200);
    tone(buzzer, 1000,0);
    lcd.clear();
    lcd.setCursor (0,0);
    lcd.print("deteksi gas/asap");
    lcd.setCursor (0,1);
    lcd.print(asap);
    delay (2000);
    
  }
  else if (suhu > 30 || kelembapan > 70)
  {
    digitalWrite(merah, HIGH);
    delay (3000);
    digitalWrite(merah, LOW);
    digitalWrite(hijau, LOW);
    tone(buzzer, 5000, 500);
    lcd.clear();
    lcd.setCursor(0,0);
    lcd.print("Suhu/Kelembapan");
    lcd.setCursor(0,1);
    lcd.print("Tinggi!");
    delay (2000);
    
  }
  else 
  {
    digitalWrite(merah, LOW);
    digitalWrite(hijau, LOW);
    tone(buzzer, 0,0);
    lcd.clear();
    lcd.print("kondisi normal");
    delay (2000);}
  

   lcd.setCursor(0,0);
   lcd.print("Suhu:");
   lcd.print(suhu);
   lcd.print("*C");
   lcd.setCursor(9,0);
   lcd.print("A:");
   lcd.print(asap);
   lcd.setCursor(0,1);
   lcd.print("Humi: ");
   lcd.setCursor(7,1);
   lcd.print(kelembapan);
   lcd.setCursor(14,1);
   lcd.print("%");
}