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

#define DHTPIN 2
#define DHTTYPE DHT22

#define TRIGGER_PIN 7
#define ECHO_PIN 6

#define RED_LED 8
#define YELLOW_LED 9
#define GREEN_LED 10

DHT dht(DHTPIN, DHTTYPE);
LiquidCrystal_I2C lcd(0x27, 20, 4);  // Alamat I2C LCD dapat berbeda

void setup() {
  pinMode(TRIGGER_PIN, OUTPUT);
  pinMode(ECHO_PIN, INPUT);
  pinMode(RED_LED, OUTPUT);
  pinMode(YELLOW_LED, OUTPUT);
  pinMode(GREEN_LED, OUTPUT);

  dht.begin();
  lcd.init();
  lcd.backlight();
}

void loop() {
  // Membaca suhu dan kelembaban dari sensor DHT22
  float humidity = dht.readHumidity();
  float temperature = dht.readTemperature();

  // Membaca jarak dari sensor ultrasonik HC-SR04
  digitalWrite(TRIGGER_PIN, LOW);
  delayMicroseconds(2);
  digitalWrite(TRIGGER_PIN, HIGH);
  delayMicroseconds(10);
  digitalWrite(TRIGGER_PIN, LOW);
  float distance = pulseIn(ECHO_PIN, HIGH) / 58.2;  // Mengonversi waktu ke jarak (cm)

  // Menampilkan data suhu dan jarak pada LCD
  lcd.clear();
  lcd.setCursor(0, 0);
  lcd.print("Suhu: ");
  lcd.print(temperature);
  lcd.print(" C");
  lcd.setCursor(0, 1);
  lcd.print("Kelembaban: ");
  lcd.print(humidity);
  lcd.print(" %");
  lcd.setCursor(0, 2);
  lcd.print("Jarak: ");
  lcd.print(distance);
  lcd.print(" cm");

  // Mengatur LED berdasarkan jarak
  if (distance > 300) {
    digitalWrite(GREEN_LED, HIGH);
    digitalWrite(YELLOW_LED, LOW);
    digitalWrite(RED_LED, LOW);
  } else if (distance > 100 && distance <= 300) {
    digitalWrite(GREEN_LED, LOW);
    digitalWrite(YELLOW_LED, HIGH);
    digitalWrite(RED_LED, LOW);
  } else {
    digitalWrite(GREEN_LED, LOW);
    digitalWrite(YELLOW_LED, LOW);
    digitalWrite(RED_LED, HIGH);
  }

  delay(2000);  // Menunggu 2 detik sebelum membaca ulang
}