#include <DHT.h> //include dht library
#include <LiquidCrystal_I2C.h> // include librarty lcd i2c
#define dhtpin 4 //pin dht di pin 4
#define dhttype DHT22 // type dht DHT22
#define relaypin 2 //pin relay di pin 2

DHT dht(dhtpin,dhttype); //pembuatan variabel dht
LiquidCrystal_I2C lcd(0x27,16,2); // pengalamatan variabel lcd

void setup() {
 
Serial.begin(115200);
Serial.println("Raddyaarizaldy");
  
  pinMode(relaypin, OUTPUT); // menentukan type pin relay sebagai output
  lcd.init();
  lcd.backlight();

lcd.setCursor(0,0);
lcd.print("PRA UJK IOT");
lcd.setCursor(0,1);
lcd.print("Raddyaarizaldy");

delay(2000);
lcd.clear();

}

void loop() {
  delay(1000); // delay untuk jeda pembacaan sensor
  float suhu = dht.readTemperature();
  float humid = dht.readHumidity();
Serial.print("suhu :");
Serial.println(suhu);

lcd.setCursor(0,0);
lcd.print("Temperature : ");
lcd.setCursor(0,1);
lcd.print(suhu);
lcd.print(char(223));
lcd.print("C");

if(suhu <=30){
  digitalWrite(relaypin, HIGH);
} else {
  digitalWrite(relaypin, LOW);
}


}