void setup() {
  // put your setup code here, to run once:
  Serial.begin(115200);
  Serial.println("Hello, ESP32!");
  pinMode(15, OUTPUT);
  digitalWrite(15, HIGH);
  delay(50);
  digitalWrite(15, LOW);
}

void loop() {
  // put your main code here, to run repeatedly:
  delay(10); // this speeds up the simulation
}
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