int button=23;
int val;

void setup() {
  pinMode(button,INPUT);
  // put your setup code here, to run once:
  Serial.begin(115200);
 
}

void loop() {
  val=digitalRead(button);
  if(val==HIGH)
  {
     Serial.println("Hello, ESP32!");
  }
  else
  {
     Serial.println("not activated");
  }
  // put your main code here, to run repeatedly:
  delay(1000); // this speeds up the simulation
}