void setup() {
  // put your setup code here, to run once:
  Serial.begin(115200);
  Serial.println("Hello, ESP32!");
  pinMode(14,INPUT);
  pinMode(21, OUTPUT);
  pinMode(4, OUTPUT);
}

void loop()
{
  int a=analogRead(14);
  Serial.println(a);
  if(a==196)
  {
    digitalWrite(21, HIGH);
    digitalWrite(4, HIGH);
  }
  else
  {
    digitalWrite(21, LOW);
    digitalWrite(4, LOW);
  }

}