void setup() {
  // put your setup code here, to run once:
  Serial.begin(115200);
  Serial.println("Hello, ESP32!");
  pinMode(32, INPUT_PULLUP);
  pinMode(21, INPUT_PULLUP);
}

  void loop() {
    delay(1000);
    Serial.println("32: " + String(digitalRead(32)));
    Serial.println("21: " + String(digitalRead(21)));
  }