#define led 18
#define Switch 4
int value = 0;
#define buzzer 13

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

void loop() {
  value = digitalRead(Switch);
  Serial.print(value);
  digitalWrite(led,value);
  delay(100);
  digitalWrite(buzzer,value);
}