#define pir 4
#define led 18
int val = 0;


void setup() {
  // put your setup code here, to run once:
  Serial.begin(115200);
  Serial.println("Hello, ESP32!");
  pinMode(pir, INPUT);
  pinMode(led, OUTPUT);
}

void loop() {
  val = digitalRead(pir);
  if (val == 1){
    digitalWrite(led, HIGH);
    delay(1000);
  }
  else{
    digitalWrite(led, LOW);
  }
  delay(100);

}