byte buttonPin=12;
 void setup() {
  // put your setup code here, to run once:
  Serial.begin(115200);
  Serial.println("Hello, ESP32!");
  pinMode(buttonPin, INPUT_PULLUP);

}

void loop() {
  // put your main code here, to run repeatedly:
  int buttonState = digitalRead(buttonPin);
  Serial.print("buttonState:");
  Serial.println(buttonState);
  delay(1000); // this speeds up the simulation
}