#include <DHT.h>

#define TRIGGER_PIN 2
#define ECHO_PIN 3
#define DHT_PIN 4
#define DHT_TYPE DHT22

DHT dht(DHT_PIN, DHT_TYPE);

void setup() {
  Serial.begin(9600);
  pinMode(TRIGGER_PIN, OUTPUT);
  pinMode(ECHO_PIN, INPUT);
  dht.begin();
}

void loop() {
  // Mengukur suhu dan kelembapan
  float temperature = dht.readTemperature();
  float humidity = dht.readHumidity();
  
  // Mengkoreksi kecepatan suara berdasarkan suhu dan kelembapan
  float speedOfSound = 331.4 + (0.606 * temperature) + (0.0124 * humidity);

  // Mengirimkan sinyal ultrasonik
  digitalWrite(TRIGGER_PIN, LOW);
  delayMicroseconds(2);
  digitalWrite(TRIGGER_PIN, HIGH);
  delayMicroseconds(10);
  digitalWrite(TRIGGER_PIN, LOW);

  // Membaca waktu tempuh gelombang suara
  unsigned long duration = pulseIn(ECHO_PIN, HIGH);

  // Menghitung jarak berdasarkan waktu tempuh
  float distance = (duration / 2.0) * (speedOfSound / 10000.0);

  // Menampilkan hasil pengukuran
  Serial.print("Jarak: ");
  Serial.print(distance);
  Serial.println(" cm");

  // Menampilkan suhu dan kelembapan
  Serial.print("Suhu: ");
  Serial.print(temperature);
  Serial.print(" °C");
  Serial.print(" | Kelembapan: ");
  Serial.print(humidity);
  Serial.println(" %");

  delay(1000);
}