#include<HardwareSerial.h>

HardwareSerial SerialPort(2);
const int ledPin = 2; 

void setup() {
  SerialPort.begin(15200, SERIAL_8N1, 16, 17);
  pinMode(ledPin, OUTPUT);
}

void loop() {
  SerialPort.print(1);
  digitalWrite(ledPin, HIGH); // Turn on the LED
  delay(5000);

  SerialPort.print(0);
  digitalWrite(ledPin, LOW); // Turn off the LED
  delay(5000);
}