int pirPin = 2;     // pin OUT sensor PIR
int ledPin = 7;    // pin LED (bisa pakai LED internal UNO)

int pirState = LOW; // default tidak ada gerakan
int val = 0;        // variabel baca PIR

void setup() {
  pinMode(pirPin, INPUT);
  pinMode(ledPin, OUTPUT);
  Serial.begin(9600);
  Serial.println("PIR Sensor Test");
}

void loop() {
  val = digitalRead(pirPin);

  if (val == HIGH) {              // jika ada gerakan
    digitalWrite(ledPin, HIGH);   // LED nyala
    if (pirState == LOW) {
      Serial.println("Gerakan terdeteksi!");
      pirState = HIGH;
    }
  } else {
    digitalWrite(ledPin, LOW);    // LED mati
    if (pirState == HIGH) {
      Serial.println("Tidak ada gerakan...");
      pirState = LOW;
    }
  }
}