[eoghanconnolly]

I have an app using Bluetooth which I am trying to get working on a Nokia 6680. It seems to be working okay on a 6600, but for some reason I am getting IOExceptions on the 6680 when I try to use either an InputStream or OutputStream. I don't know why it would work on one phone and not another. Anyone got any ideas?

Client code seems to fall over on. Here out is an OutputStream:
conn = (StreamConnection)Connector.open(connString);
out = conn.openOutputStream();

Server code seems to fall over on. Here out is a ByteArrayOutputStream used to collect the input and use it. in is an InputStream:
while ((data = in.read()) != -1) {
out.write(data);
}


Thanks

Owen

[eoghanconnolly]

In case anyone else has the same problem and reads this post looking for a solution - the workaround suggested by Nokia (from documentation on this website) is to use L2CAP instead of RFCOMM for the application. I have implemented this and it works better. There is still another problem with the 6680, but the 6680 can receive incoming data without any problems using L2CAP.

[duncanray]

Owen,

I'm studying for a Masters Degree in Human Computer Interaction in the UK at the moment. For my final project I desperately need to get bluetooth working between two 6680s but none of the examples I've thus far come across seem to work on them. Sadly without the app, my whole evaluation will not work. I have to get this completed within the next week so can cheekily request a working example from you? I will be very grateful if you are able to assist me and I will personally ensure that your code will go no further than this project.

Thanks,
D

[jimgilmour1]

It seems to be working okay on a 6600, but for some reason I am getting IOExceptions on the 6680 when I try to use either an InputStream or OutputStream. I don't know why it would work on one phone and not another. Anyone got any ideas?

The 6600 has many documented differences on MIDP 2.0 for 6600 as found in

Known Issues In The Nokia 6600 MIDP 2.0 Implementation v1.7

see page 15 says:-

2.30 Using Bluetooth Serial Port in MIDlets
Description
Reading incoming stream does not work properly. When the Bluetooth Serial Port Profile (RFCOMM protocol) is used, reading incoming stream is sometimes interrupted with IOException. .The read() method of the InputStream class may throw an IOException if the other end has closed the stream while the InputStream is still reading it
Another issue is that the InputStream cannot use a bigger array than 512 bytes when reading stream. A bigger byte array may crash the MIDlet.
Run, for example, the BtsppEcho example application to reproduce the issue.

The PC suite has a version specifically for "PC suite for Nokia 6600" the latest version 6.8 will not work properly with the 6600.

Jim

[jimgilmour1]

For my final project I desperately need to get bluetooth working between two 6680s but none of the examples I've thus far come across seem to work on them. Sadly without the app, my whole evaluation will not work.

Well if you need Java use the Sun WTK
http://developers.sun.com/techtopics/mobility/getstart/
http://java.sun.com/products/sjwtool...nload-2_2.html

and if you and to use the bluetooth example in
C:\WTK22\apps\BluetoothDemo\src\example\bluetooth\demo which contains the java source.

See the thread Bluetooth s60 Programming

and you will need to load Carbide.c++ Express

The first free version of a C++ IDE targeting development of Symbian OS applications on standard SDKs is now available. The tool quickly guides the newcomer though all the steps required to write, build, and deploy a Symbian OS application on a mobile phone. Developers with experience working in an Eclipse integrated development environment (IDE) will feel right at home, and experienced Symbian programmers will be able to put their skills to work right away.

-------------------------------------------------------------------
Java wtk2.2
-------------------------------------------------------------------

PHP Code:

/* FTPserviceMIDlet.jar */ 
package phone.server;
//import com.sun.midp.io.j2me.storage.File;
//import net.benhui.bluecove.spp_bt;

import java.util.*;
import java.io.*;
import javax.microedition.io.*;
import javax.microedition.io.file.*;

//import javax.obex.*;

//Screen Midlet and display
import javax.microedition.midlet.*;

import javax.microedition.lcdui.Command;
import javax.microedition.lcdui.CommandListener;
import javax.microedition.lcdui.Display;
import javax.microedition.lcdui.Displayable;
import javax.microedition.lcdui.List;
import javax.microedition.lcdui.TextField;

import javax.bluetooth.*;

// uses the de.avetana OBEX library 
import de.avetana.obexsolo.OBEXConnector;
import de.avetana.javax.obex.HeaderSet;
import de.avetana.javax.obex.Operation;
import de.avetana.javax.obex.ResponseCodes;
import de.avetana.javax.obex.ServerRequestHandler;
import de.avetana.javax.obex.SessionNotifier;

public class FTPserviceMIDlet extends MIDlet implements CommandListener {

   private FileServer fServer;
       /** Soft button for exiting the demo. */
    private final Command EXIT_CMD = new Command("Exit", Command.EXIT, 2);

    /** Soft button for launching a client or sever. */
    private final Command OK_CMD = new Command("Ok", Command.SCREEN, 1);

    /** A list of menu items */
    private static final String[] elements = { "Server", "Client"};

    /** A menu list instance */
    private final List menu = new List("FTPservice", List.IMPLICIT,
            elements, null);

 
    //JLabel spacerlabel = new JLabel(" ");

    //JButton startButton = new JButton("Start Server");
    //JTextArea textarea = new JTextArea("",20, 40);    

    public FTPserviceMIDlet(){
                    menu.addCommand(EXIT_CMD);
                    menu.addCommand(OK_CMD);
                    menu.setCommandListener(this);
        }
        public void startApp() {
            show();
        }
        protected void destroyApp(boolean unconditional) {
        // nothing to destroy needed as override to midlet
        } 
        public void pauseApp() {
        // nothing to do needed as override to midlet}
        }
   /**
     * Responds to commands issued on "client or server" form.
     *
     * @param c command object source of action
     * @param d screen object containing actioned item
     */
    public void commandAction(Command c, Displayable d) {
        if (c == EXIT_CMD) {
            destroyApp(true);
            notifyDestroyed();
            return;
        }

        switch (menu.getSelectedIndex()) {
        case 0:
            fServer = new FileServer(this);
            break;
        case 1:
 

           //FTPClient = new FTPClient(this);
            break;
        case 2:
        //uuidClient = new UUIDinput(this);
             break;
        default:
            System.err.println("Unexpected choice...");
            break;
        }
    }

    /** Shows main menu of MIDlet on the screen. */
    void show() {
        Display.getDisplay(this).setCurrent(menu);
    }

    /**
     * Returns the displayable object of this screen -
     * it is required for Alert construction for the error
     * cases.
     */
    Displayable getDisplayable() {
        return menu;
    }


// Display the new messages

      public void updateStatus(String stringOpMsg){
           menu.append((String) stringOpMsg, null);
           Display.getDisplay(this).setCurrent(menu);
      }

//    public static void main(String[] args) {
//
//        new FileServer();
//
//    }
//




} 


See next post for file server.jar

Jim

[jimgilmour1]

Hi,
Here is second part the fileserver.jar

---------------------------------------------------------------

file server
---------------------------------------------------------------

PHP Code:

/* FileServer.jar */
package phone.server;
//import com.sun.midp.io.j2me.storage.File;
//import net.benhui.bluecove.spp_bt;

import javax.bluetooth.*;

//for alert on screen
import javax.microedition.lcdui.Alert;
import javax.microedition.lcdui.AlertType;

// uses the de.avetana OBEX library 
import de.avetana.obexsolo.OBEXConnector;
import de.avetana.javax.obex.HeaderSet;
import de.avetana.javax.obex.Operation;
import de.avetana.javax.obex.ResponseCodes;
import de.avetana.javax.obex.ServerRequestHandler;
import de.avetana.javax.obex.SessionNotifier;

import javax.obex.*;
import java.io.OutputStream;

import javax.microedition.io.Connector;
import javax.microedition.io.file.FileConnection;


public  class FileServer extends ServerRequestHandler {
      // Bluetooth singleton object
        LocalDevice device;
        DiscoveryAgent agent;
        OutputStream fos;
        FileConnection fc;
        
    static final int ALERT_TIMEOUT = 2000;
    private String fname;

       public FileServer(FTPserviceMIDlet parent){
//        startButton.setEnabled(false);
//        display = Display.getDisplay(this);
        try {
            UUID uuid = new UUID("9106", true);
                        device = LocalDevice.getLocalDevice(); // obtain reference to singleton
                        device.setDiscoverable(DiscoveryAgent.GIAC); // set Discover mode to LIAC

            String url = "btgoep://localhost:" + uuid + ";name=FTP;authenticate=false;master=false;encrypt=false";

            SessionNotifier sn = (SessionNotifier)Connector.open(url);
                              // Retrieve the service record template
                        //ServiceRecord rec = device.getRecord( sn );
                        // set ServiceRecord ServiceAvailability (0x0008) attribute to indicate our service is available
                        // 0xFF indicate fully available status
                        // This operation is optional
                        //rec.setAttributeValue( 0x0008, new DataElement( DataElement.U_INT_1, 0xFF ) );

            updateStatus("[server:] Now waiting for a client to connect");
            sn.acceptAndOpen(this);
        
            updateStatus("[server:] A client is now connected");    
        } catch (Exception ex){
        }            
        
       }



    public int onConnect(HeaderSet request, HeaderSet reply) {
        updateStatus("[server:] The client has created an OBEX session");
        return ResponseCodes.OBEX_HTTP_OK;
    }
    
    
    public int onPut (Operation op) {
                try{
                    fname =op.getReceivedHeaders().getHeader(HeaderSet.NAME) + " type " + op.getType();

                } catch (Exception e) {
                    String s = "Operation error filename header error '"+ fname;
                          
                     if (e.getMessage() != null && e.getMessage().length() > 0) {
                        s += "\n" + e;
                            }
                            Alert alert = new Alert("Error!", s, null, AlertType.ERROR);         
                            alert.setTimeout(ALERT_TIMEOUT );
 
                }
                
        try {
            java.io.InputStream is = op.openInputStream();
            
            updateStatus("Got data bytes " + is.available() + " name " + fname);
            
            // this code is for java server on PC JRE with Bluecove.jar 
            //File f = new File((String)op.getReceivedHeaders().getHeader(HeaderSet.NAME));
            //FileOutputStream fos = new FileOutputStream (f);
            // this will open file on phone
            
                    FileConnection fc = (FileConnection) Connector.open("file:///" +
                    (String)op.getReceivedHeaders().getHeader(HeaderSet.NAME));
                        fc.create();
                        // open the file stream
                        fos = fc.openOutputStream();
            byte b[] = new byte[1000];
            int len;
            //copy over data while its available
            while (is.available() > 0 && (len = is.read(b)) > 0) {
                fos.write (b, 0, len);
            }
            //close output file
            fos.close();
 
                   } catch (Exception e) {
                            String s = "Can not create file '"+ fname;
                         
                            if (e.getMessage() != null && e.getMessage().length() > 0) {
                        s += "\n" + e;
                            }
                            Alert alert = new Alert("Error!", s, null, AlertType.ERROR);         
                            alert.setTimeout(ALERT_TIMEOUT );
////                    Display.getDisplay(FileServer.menu).setCurrent(alert);
                            e.printStackTrace(); 

            }
                        
        return ResponseCodes.OBEX_HTTP_OK;
    }
        

// when finished disconnect command is sent

    
    public void onDisconnect (HeaderSet req, HeaderSet resp) {
                        
        updateStatus("[server:] The client has disconnected the OBEX session");
                                
    }




    public void updateStatus(String message){

        //textarea.append("\n" + message);

    }




} 


So thats it for Java Midlets.

If you want to visually debug you will need netbeans and netbeans mobility and lots of patience to learn it.

Jim