[mikrodidakt1]

Hi!

I am trying to connect my N82 as master to a smale device running as slave but I cannot get it to work.

I am using the following code:

con = (StreamConnection) Connector.open("btspp://00011E016848:1;master=true;encrypt=true");
os = con.openOutputStream();
is = con.openInputStream();
os.write(new String("w\n").getBytes());
nbrBytes = is.read(buffer);

while(buffer[nbrBytes - 1] != CR) {
tmp = is.read(data);
for(int i = 0; i < tmp; ++i) {
buffer[nbrBytes + i] = data[i];
}
nbrBytes += tmp;
}

When I am using this url to connect I get a BluetoothConnectionException thrown, if i remove the master=true in the url "btspp://00011E016848:1encrypt=true" I managed to connect but I don't manage to write to the slave device. The strange thing is that the phone thinks everything went ok, no exception, but the slave device don't receive anything. I have managed to run the program on my computer and that works so the there is no problem with the slave device.

Any thoughts would be appreciated.

[mikrodidakt1]

I tried using flush but that did not work?

os.write(new String("w\n").getBytes());
os.flush();

[mikrodidakt1]

I have tried everything but nothing works, I have managed to run this code on a Sony Ericsson W810 and that works great but for some reasone I can't run this on the N82, I can't use the master=true since then I cannot connect and I if i don't use it i can't write to the device. If you think that this seems correct pleas let me know so that I dont spend any more time on this code It could be that I have to do some modification on the client device to make it run, I just think it seems strange that it works on the SE phone but not on the Nokia, I thought Java was platform independet? Apparently not.

public class HelloMIDlet extends MIDlet implements CommandListener {

private boolean midletPaused = false;
private String alertStr;
private StreamConnection connection;
private InputStream is;
private OutputStream os;
private Command getWCommand;
private Command exitCommand;
private Command conCommand;
private Command closeCommand;
private SimpleCancellableTask task;
private Alert alert;
private WaitScreen waitScreen;
private Form form;
private StringItem stringItem;
...
..
..
public void commandAction(Command command, Displayable displayable) {
// write pre-action user code here
if (displayable == form) {
if (command == closeCommand) {
// write pre-action user code here
try {
connection.close();
getForm().removeCommand(getCloseCommand());
getForm().removeCommand(getGetWCommand());
getForm().addCommand(getConCommand());
} catch(IOException e) {
System.out.println(e.toString());
}

// write post-action user code here
} else if (command == conCommand) {
// write pre-action user code here
try {
connection = (StreamConnection) Connector.open("btspp://000BCEA16848:1;encrypt=true");
System.out.println("Connected");
is = connection.openInputStream();
os = connection.openOutputStream();
System.out.println("created IN/OUT");
getForm().addCommand(getCloseCommand());
getForm().addCommand(getGetWCommand());
getForm().removeCommand(getConCommand());
} catch(IOException e) {
System.out.println(e.toString());
}


// write post-action user code here
} else if (command == exitCommand) {
// write pre-action user code here
try {
connection.close();
getForm().removeCommand(getCloseCommand());
getForm().removeCommand(getGetWCommand());
getForm().addCommand(getConCommand());
} catch(IOException e) {
System.out.println(e.toString());
}
exitMIDlet();
// write post-action user code here
} else if (command == getWCommand) {
// write pre-action user code here
switchDisplayable(null, getWaitScreen());
// write post-action user code here
}
} else if (displayable == waitScreen) {
if (command == WaitScreen.FAILURE_COMMAND) {
// write pre-action user code here
alertStr += " Failure";
switchDisplayable(getAlert(), getForm());
// write post-action user code here
} else if (command == WaitScreen.SUCCESS_COMMAND) {
// write pre-action user code here
alertStr += " Success";
switchDisplayable(getAlert(), getForm());
// write post-action user code here
}
}
// write post-action user code here
}
..
....
..
public SimpleCancellableTask getTask() {
if (task == null) {
// write pre-init user code here
task = new SimpleCancellableTask();
task.setExecutable(new org.netbeans.microedition.util.Executable() {
public void execute() throws Exception {
// write task-execution user code here


// create a server connection
int nbrBytes = 0;
int tmp = 0;
byte CR = (byte) 0x0D;
byte[] data = new byte[80];
// prepare to send/receive data
byte buffer[] = new byte[100];
String msg = "s\n";

// send data to the client
System.out.println("write to client");
os.write(msg.getBytes());
// read data from client
System.out.println("read from client");
nbrBytes = is.read(buffer);
while(buffer[nbrBytes - 1] != CR) {
System.out.println("No CR:" + new Byte(buffer[nbrBytes - 1]).toString());
tmp = is.read(data);
for(int i = 0; i < tmp; ++i) {
buffer[nbrBytes + i] = data[i];
}
nbrBytes += tmp;
}
String received = new String(buffer, 0, nbrBytes);
System.out.println(nbrBytes + "nbr of bytes recived.");
System.out.println("received: " + received);

}
});
// write post-init user code here
}
return task;
}

public WaitScreen getWaitScreen() {
if (waitScreen == null) {
// write pre-init user code here
waitScreen = new WaitScreen(getDisplay());
waitScreen.setTitle("waitScreen");
waitScreen.setCommandListener(this);
waitScreen.setTask(getTask());
// write post-init user code here
}
return waitScreen;
}
...
...
..
}

[Rombosia]

I'm also desperately in need of a solution to this problem. I can't communicate to my Bt device without explicitly specifying master=true!!! Any Nokia Development support guys to the rescue?

[mahbub_s60]

Hi,
I am not Java expert but still I can suggest you that you take a working example from Forum Nokia wiki and try that.

[traud]

Rombosia, I recommend to let us continue with your original post …