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

#define DHT_PIN 2 
#define DHT_TYPE 22 

#define RED_LED_PIN 8 
#define YELLOW_LED_PIN 9 
#define GREEN_LED_PIN 10 
#define buzzer_PIN 11
DHT dht(2, 22);

LiquidCrystal_I2C lcd(0x27, 16, 2);
void setup() {
  Serial.begin(9600);
  dht.begin();
  lcd.init(); 
  lcd.backlight();

  pinMode(RED_LED_PIN, OUTPUT);
  pinMode(YELLOW_LED_PIN, OUTPUT);
  pinMode(GREEN_LED_PIN, OUTPUT);
  pinMode(buzzer_PIN, OUTPUT);
  noTone(buzzer_PIN);
  digitalWrite(RED_LED_PIN, LOW);
  digitalWrite(YELLOW_LED_PIN, LOW);
  digitalWrite(GREEN_LED_PIN, LOW);
}

void loop() {
delay(2000);
  float suhu = dht.readTemperature(); 
 float lembab = dht.readHumidity();

 lcd.clear(); 
  lcd.setCursor(1, 0); 
  lcd.print("Suhu: ");
  lcd.print(suhu);
  lcd.print(" C");
  
  lcd.setCursor(0, 1);
  lcd.print("Lembab: ");
  lcd.print(lembab);
  lcd.print(" %");

  if (isnan(suhu) && (lembab)) {
    Serial.println("ERORR");
    return;
  }

  Serial.print("Suhu: ");
  Serial.println(suhu);
  Serial.print("Lembab: ");
  Serial.println(lembab);

  if (suhu > 35) {
    digitalWrite(RED_LED_PIN, HIGH);
    digitalWrite(YELLOW_LED_PIN, LOW);
    digitalWrite(GREEN_LED_PIN, LOW);
    for (int i = 0; i < 3; i++) {
    tone(buzzer_PIN,1000);
    delay(500);
    noTone(buzzer_PIN);
    delay(500);

    }
  } else if (suhu >= 30 && suhu <= 35) {
    digitalWrite(RED_LED_PIN, LOW);
    digitalWrite(YELLOW_LED_PIN, HIGH);
    digitalWrite(GREEN_LED_PIN, LOW);
    noTone(buzzer_PIN);
  } else {
    digitalWrite(RED_LED_PIN, LOW);
    digitalWrite(YELLOW_LED_PIN, LOW);
    digitalWrite(GREEN_LED_PIN, HIGH);
    for (int i = 0; i < 2; i++){
    tone(buzzer_PIN,1000);
    delay(500);
    noTone(buzzer_PIN);
    delay(500);
    }
  }

}