#include <DHT.h>

#define DHTPIN 18
#define PIRPIN 17
#define DHTTYPE DHT22

DHT dht(DHTPIN, DHTTYPE);
int pirState = LOW;
int lastPirState = LOW;

void setup() {
  Serial.begin(9600);
  dht.begin();
  pinMode(PIRPIN, INPUT);
}

void loop() {
  pirState = digitalRead(PIRPIN);
  
  if (pirState == HIGH && lastPirState == LOW) {
    // PIR aktif, manusia terdeteksi
    Serial.println("Keberadaan manusia terdeteksi!");
    float h = dht.readHumidity();
    float t = dht.readTemperature();
    
    if (isnan(h) || isnan(t)) {
      Serial.println("Error: Gagal membaca sensor DHT.");
      return;
    }
    
    Serial.print("Suhu: ");
    Serial.print(t);
    Serial.print(" °C, Kelembaban: ");
    Serial.print(h);
    Serial.println("%");
  } else if (pirState == LOW && lastPirState == HIGH) {
    // PIR non-aktif, tidak ada manusia terdeteksi
    Serial.println("Tidak ada manusia terdeteksi.");
  }
  
  lastPirState = pirState;
  
  delay(500);
}