void setup()
{
  Serial1.begin(115200);
  //pinMode(1, INPUT);
  pinMode(13, OUTPUT);
  pinMode(7, OUTPUT);

  Serial1.println("hello world");
}

void loop()
{
  digitalWrite(13,HIGH);
  digitalWrite(7,HIGH);
  Serial1.println("ON");
  delay(1000);
  digitalWrite(13,LOW);
  digitalWrite(7,LOW);
  Serial1.println("OFF");
  delay(1000);
}