File content as of revision 2:1fd9d55f66e0:

#include "mbed.h"

Serial pc(USBTX, USBRX);
Serial blue(p9, p10);          // TX, RX

DigitalOut myled(LED1);
DigitalOut myled2(LED2);
DigitalOut myled4(LED4);


int main() 
{
char receive_buffer[30];



    blue.baud(9600);
    pc.baud(115200);
    pc.printf("Bluetooth Start\r\n");
    blue.printf("Bluetooth Start\r\n");
    
    // echo back characters and toggle the LED
    while (1) 
    {
        myled2 = !myled2;
        if (blue.readable()) 
        {    
           myled = !myled;
           blue.gets(receive_buffer,30); // read all ascii chars (string) into buffer
                      
           long int slider = strtol(receive_buffer,NULL,10); // convert string to a long integer
           pc.printf("%ld ",slider);//printf long int slider
        
                        
            //pc.putc(blue.getc()); 

            
        }
        if (pc.readable()) 
        {
            blue.putc(pc.getc());
            myled4 = !myled4;
        }
        
    }
}