// Pin definitions
const int pirPin = 2;
const int ledPin = 4;

// Variables for timing
unsigned long startTime;
unsigned long endTime;
unsigned long responseTime;

void setup() {
  Serial.begin(115200);
  pinMode(pirPin, INPUT);
  pinMode(ledPin, OUTPUT);
  Serial.println("Motion Detection Response Time Test - ESP32");
}

void loop() {
  // Start timing when motion is detected
  if (digitalRead(pirPin) == HIGH) {
    startTime = micros();
    digitalWrite(ledPin, HIGH);
    
    // Calculate response time
    endTime = micros();
    responseTime = endTime - startTime;
    
    // Print results
    Serial.print("Response Time (microseconds): ");
    Serial.println(responseTime);
    
    delay(1000); // Delay to avoid multiple readings
  } else {
    digitalWrite(ledPin, LOW);
  }
}