#include <ESP32Servo.h>

#define MOTION_SENSOR_PIN 22  
#define SERVO_PIN 26           

Servo servo;

int angle = 0;
int lastMotionState = LOW;
int currentMotionState = LOW;

void setup() {
  Serial.begin(9600);

  pinMode(MOTION_SENSOR_PIN, INPUT);
  servo.attach(SERVO_PIN);

  servo.write(angle);
  currentMotionState = digitalRead(MOTION_SENSOR_PIN);
  lastMotionState = currentMotionState;

  Serial.println("System ready...");
}

void loop() {
  lastMotionState = currentMotionState;
  currentMotionState = digitalRead(MOTION_SENSOR_PIN);

  // Motion detected (LOW → HIGH)
  if (currentMotionState == HIGH && lastMotionState == LOW) {
    Serial.println("Motion detected! Rotating servo to 90°");
    servo.write(90);
  }

  // Motion stopped (HIGH → LOW)
  else if (currentMotionState == LOW && lastMotionState == HIGH) {
    Serial.println("Motion stopped! Rotating servo to 0°");
    servo.write(0);
  }

  delay(50); // small debounce
}