#define IR_SENSOR 4

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

void loop() {
  // put your main code here, to run repeatedly:
  int a=digitalRead(IR_SENSOR);
  Serial.print("Detected: ");
  if(a==1){
    Serial.println("HIGH");
  } else{
    Serial.println("LOW");
  }
  delay(5000); // this speeds up the simulation
}