UART communication results in garbled values on Serial Monitor

[pedrostu 0]

Hello.

I have been trying to create a serial link between the Launchpad (based on tm4c123gh6pm) and my cellphone. The code is very simple for testing purpose. Here is it:

/* This is a demo code for testing Bluetooth functionality

->The peripheral used here was a smartphone; and to obtain the values of 'i' on the terminal of the device, the "display mode" setting must be changed to ' HEX'

->The code doesn't work properly on when the pin 10 and 11 are used as RX and TX

->It has been successfully tested to send the values of i to the Rx terminal and receive the characters sent from there. */

 

int i=0;

void setup()

{

 Serial.begin(9600);

 Serial.print("Welcome ");

}

 

 char data_from_Blue=0;

 //String rx_str = "";

 

void loop()

{

   for(i=0;i<10;i++)

   {

        if(Serial.available()>0)

        { 

           data_from_Blue = Serial.read();    // reading the data received from the bluetooth module/the peripheral (phone here)         

           Serial.println("I received: ");

           Serial.println(data_from_Blue);

           //Serial.println(rx_str);   //display it on serial monitor  i.e,the reading has been received here!!              

        }

  

      Serial.write(i);                //Print incrementing value of 'i' across the other terminal(i.e, my cellphone)

      delay(1000);

   }  

}

The code works fine for Arduino+HC05 and MSP430G2 Lauchpad Kit+HC05.

But for TIVA Launchpad mentioned above, the serial monitor simply displays garbled values with '?' within boxes. I have tried almost everything.

Please help me.