#ifdef LED_BUILTIN
#undef LED_BUILTIN
#endif
#define LED_BUILTIN 2
#define LED_PIN 25

long counter = 0;

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

  pinMode(LED_BUILTIN, OUTPUT);
  pinMode(LED_PIN, OUTPUT);
}

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

  static long t1 = 0;
  if (millis() - t1 >= 250) {
    t1 = millis();
    digitalWrite(LED_BUILTIN, !digitalRead(LED_BUILTIN));
  }

  static long t2 = 0;
  if (millis() - t2 >= 500) {
    t2 = millis();
    digitalWrite(LED_PIN, !digitalRead(LED_PIN));
  }

  static long t3 = 0;
  if (millis() - t3 >= 1000) {
    t3 = millis();
    Serial.println("Cnt: " + String(counter));
  }

  if (Serial.available() > 0) {
    int value = Serial.parseInt();
    if (value > 0)
    {
      Serial.print("Number: ");
      Serial.print(value);
      Serial.print(", hex: ");
      Serial.print(value, HEX);
      Serial.print(", bin: ");
      Serial.println(value, BIN);
    }
  }
  counter++;
}