#define PIR_PIN 4   // PIR sensor OUT connected to GPIO 4
#define LED_PIN 2   // LED connected to GPIO 2

void setup() {
  Serial.begin(115200);
  pinMode(PIR_PIN, INPUT);   // Set PIR sensor as input
  pinMode(LED_PIN, OUTPUT);  // Set LED as output
  digitalWrite(LED_PIN, LOW);  // Ensure LED is off

  Serial.println("Starting PIR sensor test. Waiting 30 seconds for warm-up...");
  delay(30000);  // Wait 30 seconds for sensor to stabilize
  Serial.println("PIR sensor is warmed up. Begin motion detection.");
}

void loop() {
  int sensorValue = digitalRead(PIR_PIN);
  Serial.print("PIR Reading: ");
  Serial.println(sensorValue);

  if (sensorValue == HIGH) {
    Serial.println("🚨 Motion Detected!");
    digitalWrite(LED_PIN, HIGH);  // Turn on LED when motion is detected
    delay(1000);                  // Keep LED on for 1 second
    digitalWrite(LED_PIN, LOW);   // Turn off LED after 1 second
  }

  delay(500);  // Short delay for stability
}