#define LED 18
#define button 19

int button_state;

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

  pinMode(button, INPUT_PULLUP);
  pinMode(LED, OUTPUT);
}

void loop() {
  // put your main code here, to run repeatedly:

  delay(100);

  button_state = digitalRead(button);


  if(button_state == LOW){
    digitalWrite(LED, HIGH);
  }
  else{
    digitalWrite(LED, LOW);
  }

}