void setup() {
  // put your setup code here, to run once:
  Serial.begin(115200);
  Serial.println("Hello, ESP32!");
  pinMode(2, OUTPUT);

}

void loop() {
  // put your main code here, to run repeatedly:
  delay(10); // this speeds up the simulation
if (Serial.available()) {
    String inputword = Serial.readStringUntil('\n');

    if (inputword == "ON") {
      digitalWrite(2, HIGH);
      Serial.println("點亮內建 Led燈");
    } else if (inputword == "OFF") {
      digitalWrite(2, LOW);  
      Serial.println("關閉內建 Led燈");
    }
  }
}