Bluetooth Serial Communication Failed (Bluecove)

[Jeansonne Pierre]

Hi guys,

I have 2 devices which are connected together from serial port (RX,TX)
1) "raspberry pi"
2) "Serial Bluetooth Module" http://www.instructables.com/id/Cheap-2-Way-Bluetooth-Connection-Between-Arduino-a/

Problem = the bluetooth module cannot be discovered by Raspberry pi.
Error Message = javax.bluetooth.BluetoothStateException: Bluetooth Device is not availablelogout
it works perfectly if i use USB bluetooth plugin dongle, but it failed for "Serial Bluetooth Module"
Please help.

My code as below with 3 external Jar files included (bluecove, pi4j, java microedition)

import java.io.*;

import javax.microedition.io.*;
import javax.bluetooth.*;

import com.pi4j.io.serial.Serial;
import com.pi4j.io.serial.SerialFactory;

public class SDPEchoServer {

   public static void main( String args[] ) {
	   //final Serial serial = SerialFactory.createInstance();
	   //serial.open("/dev/ttyAMA0", 38400);
	
	   try {
		   
         UUID ECHOSERVICE_ID = new UUID("1101", true);     // Anything wrong with this line???
         String url = "btspp://localhost:" + ECHOSERVICE_ID.toString() +";name=echoService"; 

         
         LocalDevice.getLocalDevice().setDiscoverable(DiscoveryAgent.GIAC);

         System.out.println("Address: "+LocalDevice.getLocalDevice().getBluetoothAddress());
         System.out.println("Name: "+LocalDevice.getLocalDevice().getFriendlyName());
         
         StreamConnectionNotifier service = (StreamConnectionNotifier) Connector.open( url );

         StreamConnection conn = (StreamConnection) service.acceptAndOpen();
         System.out.println("Connected");

         BufferedReader in = new BufferedReader( 
                                             new InputStreamReader(
                                                conn.openInputStream()));
         PrintStream out = new PrintStream(conn.openOutputStream());

         while(true) {
            System.out.println("Waiting");

            String message=in.readLine();
            if (message==null) break;
            out.println(message);                                            // Echo 
            System.out.println( "Received: " + message );
         }

         conn.close();
      } catch ( IOException e ) {   System.out.print(e.toString());  }
   }
}