//#define btn 21

int btn = LOW;

void setup() {
  // put your setup code here, to run once:
  Serial.begin(115200);
  Serial.println("Hello, ESP32!");
  pinMode(21, INPUT);
  pinMode(17, OUTPUT);
}

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

  int btn = digitalRead(21);
  if (btn==1)
  {
    digitalWrite(17, HIGH);
    Serial.println("Button is pressed");
    //delay(1000);
  }
  else
  {
    digitalWrite(17, LOW);
    Serial.println("Button is Released");
  }
  delay(10); // this speeds up the simulation
}



/**
#define BUTTON_PIN 21
#define LED_PIN 17

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

void loop() {
  // put your main code here, to run repeatedly:
  int btn = digitalRead(BUTTON_PIN);

  if (btn == HIGH) {
    digitalWrite(LED_PIN, HIGH);
    Serial.println("Button is pressed");
  } else {
    digitalWrite(LED_PIN, LOW);
    Serial.println("Button is released");
  }
  delay(10); // this speeds up the simulation
}
**/