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

LiquidCrystal_I2C lcd(0x27, 16, 2);

//Constants:
#define DHTPIN 2         
#define DHTTYPE DHT22 

DHT dht(DHTPIN, DHTTYPE); 
int chk;
float T; 
int buzzer = 12;

void setup(){
  lcd.init(); lcd.backlight();
  Serial.begin(115200);
  dht.begin();
  pinMode(13, OUTPUT); pinMode(buzzer, OUTPUT);
  Serial.println("DHT22 sensor with Arduino Uno R3!");
  pinMode(9, OUTPUT); pinMode(10, OUTPUT); pinMode(11, OUTPUT);
}

void loop(){
  delay(2000);
  T = dht.readTemperature();
  Serial.print("SUHU:");
  Serial.print(T);
  Serial.println(" Celsius.\n");
  
  if(T > 35.00){
   digitalWrite(9, HIGH);
   digitalWrite(10, LOW);
   digitalWrite(11, LOW);
   
   lcd.println("SUHU PANAS");
   lcd.setCursor(0, 0);
   
   digitalWrite(buzzer, 1); tone(buzzer, 900, 100);
  
  }
  
  else if(T > 29.00 & T < 35.00 ){
   digitalWrite(9, LOW);
   digitalWrite(10, HIGH);
   digitalWrite(11, LOW);
   
   lcd.println("SUHU CUKUP");
   lcd.setCursor(0, 0);
   
   digitalWrite(buzzer, 0);
  }
  
  else{
   digitalWrite(9, LOW);
   digitalWrite(10, LOW);
   digitalWrite(11, HIGH);
   
   lcd.println("SUHU RENDAH");
   lcd.setCursor(0, 0);
   
   digitalWrite(buzzer, 0);
  }
  
}