#define TRIG_PIN PA0
#define ECHO_PIN PA1
#define PIR_PIN  PA2
void setup() {
  Serial.begin(9600);
  pinMode(TRIG_PIN, OUTPUT);
  pinMode(ECHO_PIN, INPUT);
  pinMode(PIR_PIN, INPUT);
}
float readDistanceCM() {
  digitalWrite(TRIG_PIN, LOW);
  delayMicroseconds(2);
  digitalWrite(TRIG_PIN, HIGH);
  delayMicroseconds(10);
  digitalWrite(TRIG_PIN, LOW);

  long duration = pulseIn(ECHO_PIN, HIGH);
  float distance = duration * 0.034 / 2;
  return distance;
}
void loop() {
  float jarak = readDistanceCM();
  int pirStatus = digitalRead(PIR_PIN);

  if (jarak < 170 && pirStatus == HIGH) {
    Serial.print("Objek TERDETEKSI oleh Ultrasonik & PIR! Jarak: ");
    Serial.print(jarak);
    Serial.println(" cm");
  } else {
    Serial.print("Tidak terdeteksi | Jarak: ");
    Serial.print(jarak);
    Serial.print(" cm | PIR: ");
    Serial.println(pirStatus == HIGH ? "Gerakan" : "Tidak");
  }
  delay(500);
}