Arduino control 11 Bits on Windows Pc

This application was developed to run on ATmega2560, but can also work with other versions of Arduino, such as Arduino Uno, Arduino Nano.
The materials needed are:
Arduino ATmega2560.
HC-05 Bluetooth COM port.
Android cell.

The Arduino program:
// Definition of Arduino pins to use.
byte BIT0 = 2;
byte BIT1 = 3;
byte BIT2 = 4;
byte BIT3 = 5;
byte BIT4 = 6;
Bit5 byte = 7;
bit6 byte = 8;
BIT7 byte = 9;
bit8 byte = 10;
Bit9 byte = 11;
Bit10 byte = 12;

Input int = 0; // Byte serial input port

void setup ()
{
  // Start serial port, the port to use is port 1, corresponding to the RX and TX = 18 = 19 for ATmega2560 Arduino pins, if you want to change the port change Serial1.begin
  // Change the number "1" for the port number to use.
  Serial1.begin (9600);
  pinMode (BIT0, OUTPUT);
  pinMode (BIT1, OUTPUT);
  pinMode (BIT2, OUTPUT);
  pinMode (BIT3, OUTPUT);
  pinMode (BIT4, OUTPUT);
  pinMode (bit5, OUTPUT);
  pinMode (bit6, OUTPUT);
  pinMode (BIT7, OUTPUT);
}

void loop ()
{
  if (Serial1.available ()> 0) {
       
    Serial1.read input = (); // Get incoming byte:

 if (input == 'A') {
      digitalWrite (BIT0, HIGH); // Switch on LED
      Serial1.print ('A'); // Send to char
      delay (100);
      digitalWrite (BIT0, LOW);
    }
if (input == 'B') {
      digitalWrite (BIT1, HIGH); // Switch on LED
      Serial1.print ('B'); // Send to char
      delay (100);
      digitalWrite (BIT1, LOW);
    }
 if (input == 'C') {
      digitalWrite (BIT2, HIGH); // Switch on LED
      Serial1.print ('C'); // Send to char
      delay (100);
      digitalWrite (BIT2, LOW);
    }
if (input == 'D') {
      digitalWrite (BIT3, HIGH); // Switch on LED
      Serial1.print ('D'); // Send to char
      delay (100);
      digitalWrite (BIT3, LOW);
    }
if (input == 'E') {
      digitalWrite (BIT4, HIGH); // Switch on LED
      Serial1.print ('E'); // Send to char
      delay (100);
      digitalWrite (BIT4, LOW);
    }
if (input == 'F') {
      digitalWrite (bit5, HIGH); // Switch on LED
      Serial1.print ('F'); // Send to char
      delay (100);
      digitalWrite (bit5, LOW);
    }
if (input == 'G') {
      digitalWrite (bit6, HIGH); // Switch on LED
      Serial1.print ('G'); // Send to char
      delay (100);
      digitalWrite (bit6, LOW);
    }
if (input == 'H') {
      digitalWrite (BIT7, HIGH); // Switch on LED
      Serial1.print ('H'); // Send to char
      delay (100);
      digitalWrite (BIT7, LOW);
    }
if (input == 'I') {
      digitalWrite (bit8, HIGH); // Switch on LED
      Serial1.print ('I'); // Send to char
      delay (100);
      digitalWrite (bit8, LOW);
    }
if (input == 'J') {
      digitalWrite (Bit9, HIGH); // Switch on LED
      Serial1.print ('J'); // Send to char
      delay (100);
      digitalWrite (Bit9, LOW);
    }
if (input == 'K') {
      digitalWrite (Bit10, HIGH); // Switch on LED
      Serial1.print ('K'); // Send to char
      delay (100);
      digitalWrite (Bit10, LOW);
    }
 
  }
}

Allows applications to connect to paired bluetooth devices.
Allows applications to open network sockets.
Allows applications to access information about Wi-Fi networks.
Allows applications to discover and pair bluetooth devices.
Allows applications to access information about networks.