#include <LiquidCrystal_I2C.h>
#include <dht.h>

dht dht22;
#define DHT22_PIN 2

LiquidCrystal_I2C lcd(0x27, 20, 4);

#define BLUE_LED 7
#define GREEN_LED 8
#define YELLOW_LED 9
#define RED_LED 10

void setup() {

  lcd.init(); 
  lcd.backlight();

  lcd.setCursor(0, 0);            
  lcd.print("SMAN 1 TANGSEL");          
  lcd.setCursor(0, 1);            
  lcd.print("INFORMATIKA"); 
  lcd.setCursor(0, 2);            
  lcd.print("CINDAI DAN KEISYA");          
  lcd.setCursor(0, 3);            
  lcd.print("KELAS X-5"); 

  pinMode(7, OUTPUT);  
  pinMode(8, OUTPUT);  
  pinMode(9, OUTPUT);  
  pinMode(10, OUTPUT);  
}

void loop() {
  delay(200); 
  int chk = dht22.read22(DHT22_PIN);

  lcd.clear();
  
  lcd.setCursor(0, 2);
  lcd.print(String("Temp : ")+String(dht22.temperature, 1));   
  lcd.setCursor(0, 3);
  lcd.print(String("Humidity : ")+String(dht22.humidity, 1));

  if(dht22.temperature > 45)
  {
    digitalWrite(7, HIGH);
    delay(200);
    digitalWrite(7, LOW);
  }
  else if(dht22.temperature >= 37)
  {
    digitalWrite(8, HIGH);
    delay(200);
    digitalWrite(8, LOW);
  }
  else if(dht22.temperature >= 21)
  {
    digitalWrite(9, HIGH);
    delay(200);
    digitalWrite(9, LOW);
  }
  else 
  {
    digitalWrite(10, HIGH);
    delay(200);
    digitalWrite(10, LOW);
  }
}