// ESP32-C3 LED_BUILTIN = pin 30
void setup() {
  pinMode(LED_BUILTIN, OUTPUT);
  Serial.begin(115200);
}

void loop() {
  digitalWrite(LED_BUILTIN, HIGH);
  delay(1000);
  digitalWrite(LED_BUILTIN, LOW);
  delay(1000);
  Serial.println(LED_BUILTIN);
}