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

// Initialize DHT sensor.
#define DHTPIN 2
#define DHTTYPE DHT22
DHT dht(DHTPIN, DHTTYPE);

// Initialize pins for LED and buzzer.
const int lampuPin = 9;
const int buzzerPin = 7;

// Initialize the LCD.
LiquidCrystal_I2C lcd(0x27, 16, 2); // Change 0x27 to your LCD address if different

void setup() {
  Serial.begin(9600);
  dht.begin();
  
  // Initialize pins for output.
  pinMode(lampuPin, OUTPUT);
  pinMode(buzzerPin, OUTPUT);

  //LCD
  lcd.init();
  lcd.backlight();

 // Display names on the LCD
  lcd.setCursor(0, 0);
  lcd.print("UAS_Embedded System");
  lcd.setCursor(0, 1);
  lcd.print("Dosen: Rudi H,MT");

  delay(3000); // Display for 3 seconds

  lcd.clear();

   // Display names on the LCD
  lcd.setCursor(0, 0);
  lcd.print("Mahasiswa:ASNAWI");
  lcd.setCursor(0, 1);
  lcd.print("NIM:1083232130");

  delay(3000); // Display for 3 seconds

  lcd.clear();
}

void loop() {
  float suhu = dht.readTemperature();

  if (!isnan(suhu)) {
    Serial.print("Suhu: ");
    Serial.print(suhu);
    Serial.println("°C");

    // Display temperature on the LCD.
    lcd.setCursor(0, 0);
    lcd.print("Suhu: ");
    lcd.print(suhu);
    lcd.print(" C");

    if (suhu > 40.0 || suhu < 40.0) {
      digitalWrite(lampuPin, HIGH);
      tone(buzzerPin, 1000);
      delay(1000);
      digitalWrite(lampuPin, LOW);
      noTone(buzzerPin);
    } else {
      digitalWrite(lampuPin, LOW);
      noTone(buzzerPin);
    }
  } else {
    Serial.println("Gagal membaca data dari sensor suhu!");
    lcd.setCursor(0, 0);
    lcd.print("Error baca suhu");
  }

  delay(2000);
}