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

#define DHTPIN 2   
#define DHTTYPE DHT22  

DHT dht(DHTPIN, DHTTYPE);

LiquidCrystal_I2C lcd(0x27, 16, 2); 

const int greenLedPin = 8;  
const int yellowLedPin = 9; 
const int redLedPin = 10;   

void setup() {
  Serial.begin(9600);
  lcd.begin(16,2);
  
  pinMode(greenLedPin, OUTPUT);
  pinMode(yellowLedPin, OUTPUT);
  pinMode(redLedPin, OUTPUT);
}

void loop() {
  delay(2000); 
  
  float suhu = dht.readTemperature();  
  
  lcd.clear();
  lcd.setCursor(0, 0);
  lcd.print("Suhu: ");
  lcd.print(suhu);
  lcd.print("C");

  if (suhu < 30) {
    lcd.setCursor(0, 1);
    lcd.print("SUHU TERLALU RENDAH");
    digitalWrite(greenLedPin, HIGH);
    digitalWrite(yellowLedPin, LOW);
    digitalWrite(redLedPin, LOW);
  } else if (suhu >= 30 && suhu <= 35) {
    lcd.setCursor(0, 1);
    lcd.print("SUHU CUKUP");
    digitalWrite(greenLedPin, LOW);
    digitalWrite(yellowLedPin, HIGH);
    digitalWrite(redLedPin, LOW);
  } else if (suhu >= 35 && suhu <= 80) {
    lcd.setCursor(0, 1);
    lcd.print("SUHU TERLALU PANAS");
    digitalWrite(greenLedPin, LOW);
    digitalWrite(yellowLedPin, LOW);
    digitalWrite(redLedPin, HIGH);
  }
}