#define led_int 2
void setup() {
  // put your setup code here, to run once:
  Serial.begin(115200);
  Serial.println("Hello, ESP32!");
  pinMode(led_int, OUTPUT);
}

void loop() {
  // put your main code here, to run repeatedly:
  digitalWrite(led_int, HIGH);
  delay(1000);
  digitalWrite(led_int, LOW);
  delay(1000); // this speeds up the simulation
  digitalWrite(led_int, HIGH);
  delay(1000);
  digitalWrite(led_int, LOW);
  delay(1000);
}