void setup() {
 pinMode(2, INPUT);
 pinMode(4, OUTPUT);
  Serial.begin(115200);
  Serial.println("Hello, ESP32!");
}

void loop() {
  int motion=0;
  motion = digitalRead(2);
  if(motion==HIGH){
    digitalWrite(4, HIGH);
     Serial.println("motion detected!");

  } else{
    digitalWrite(4, LOW);
    Serial.println("motion is not detected");
  }
  
}