#include <HardwareSerial.h>

HardwareSerial SerialPort(2); // use UART2
char number = ' ';
int builtInLED = 2; // Assuming the built-in LED is connected to GPIO pin 2

void setup() {
  Serial.begin(9600); // Start the serial monitor at a baud rate of 9600
  SerialPort.begin(15200, SERIAL_8N1, 16, 17);
  pinMode(builtInLED, OUTPUT); // Use the pin number connected to the built-in LED
  Serial.println("Serial Monitoring Started");
}

void loop() {
  if (SerialPort.available()) {
    char receivedChar = SerialPort.read();
    if (receivedChar == '0') {
      digitalWrite(builtInLED, LOW); // Turn off the built-in LED
      Serial.println("Built-in LED turned off");
    }
    if (receivedChar == '1') {
      digitalWrite(builtInLED, HIGH); // Turn on the built-in LED
      Serial.println("Built-in LED turned on");
    }
  }
}