void setup() {
  // put your setup code here, to run once:
  Serial.begin(115200);
  Serial.println("Hello, ESP32!");
  pinMode(17, OUTPUT);
  pinMode(27, INPUT);

}
void loop () {
  int swt=digitalRead(27);
  Serial.println(swt);

  if(swt ==1)
  {
  digitalWrite(17, HIGH);
  }
  else
  
  digitalWrite(17, LOW);
  }