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

#define DHTPIN 8
#define DHTTYPE DHT22
DHT dht(DHTPIN, DHTTYPE);
LiquidCrystal_I2C lcd(0x27, 16, 2);

const int kipasPin = 9; // Pin untuk Kipas
const int ledPin = 10;  // Pin untuk LED
const int batasSuhuLambat = 30; // Batas suhu kipas berputar lambat

void setup() {
  Serial.begin(115200);
  Serial.println("Mengatur kecepatan kipas dengan sensor temperatur");
  lcd.begin(16, 2);
  dht.begin();
  pinMode(kipasPin, OUTPUT);
  pinMode(ledPin, OUTPUT);
}

void loop() {
  float t = dht.readTemperature(); // Temperatur
  float h = dht.readHumidity(); // Kelembapan
  delay(500);

  if (t < batasSuhuLambat && h < 50 && h >= 30) {
    digitalWrite(kipasPin, HIGH);
    statusKipas("Cepat");
    digitalWrite(ledPin, LOW);
  } else if (t < batasSuhuLambat && h >= 50) {
    digitalWrite(kipasPin, HIGH);
    statusKipas("Lambat");
    digitalWrite(ledPin, LOW);
  } else if (t >= batasSuhuLambat && h < 50 && h >= 30) {
    digitalWrite(kipasPin, HIGH);
    statusKipas("Cepat");
    digitalWrite(ledPin, LOW);
  } else if (t >= batasSuhuLambat && h >= 50) {
    digitalWrite(kipasPin, HIGH);
    statusKipas("Cepat");
    digitalWrite(ledPin, LOW);
  } else {
    digitalWrite(kipasPin, LOW);
    statusKipas("Off");
    digitalWrite(ledPin, HIGH);
  }

  // Tampilan di LCD
  lcd.clear();
  lcd.setCursor(0, 0);
  lcd.print("Suhu=");
  lcd.print(t);
  lcd.print("C");
  lcd.setCursor(0, 1);
  lcd.print("Kelembapan=");
  lcd.print(h);
  lcd.print("%   Kipas=");
  lcd.print(statusKipas(""));

  // Tampilan di serial monitor
Serial.println("Suhu = ");
Serial.print(t);
Serial.println(" C");
Serial.println("Kelembaban = ");
Serial.print(h);
Serial.println(" %");
}
String statusKipas(String status) {
  static String kecepatan = "Off";
  if (status != "") {
    kecepatan = status;
  }
  return kecepatan;
}