Thread: Bluetooth Client

I am a beginner on java programming and i have a problem.
I use a bluetooth module (dwengo) in combination with a microcontroller (PIC16F877A)
I want write a bluetooth client program in java to communicate with the microcontoller
Examples of clients on internet do not work or give errors I cant'n resolve.
There is one program ( SampleSPPClient ) that give no errors and shows the bluetooth devices present.
But when I choose my bluetooth module I got an error (Device does not support Simple SPP Service )
I think that I have to use an other service of bluetooth but I don't know how to implement
I would be very greetfull if somebody can help me.

Here is the program I tried to use

 
import java.io.BufferedReader;
import java.io.IOException;
import java.io.InputStream;
import java.io.InputStreamReader;
import java.io.OutputStream;
import java.io.OutputStreamWriter;
import java.io.PrintWriter;
import java.util.Vector;
 
import javax.bluetooth.DataElement;
import javax.bluetooth.DeviceClass;
import javax.bluetooth.DiscoveryAgent;
import javax.bluetooth.DiscoveryListener;
import javax.bluetooth.LocalDevice;
import javax.bluetooth.RemoteDevice;
import javax.bluetooth.ServiceRecord;
import javax.bluetooth.UUID;
import javax.microedition.io.Connector;
import javax.microedition.io.StreamConnection;
 
/**
* A simple SPP client that connects with an SPP server
*/
public class SampleSPPClient implements DiscoveryListener{
 
//object used for waiting
private static Object lock=new Object();
 
//vector containing the devices discovered
private static Vector vecDevices=new Vector();
 
private static String connectionURL=null;
 
public static void main(String[] args) throws IOException {
 
SampleSPPClient client=new SampleSPPClient();
 
//display local device address and name
LocalDevice localDevice = LocalDevice.getLocalDevice();
System.out.println("Address: "+localDevice.getBluetoothAddress());
System.out.println("Name: "+localDevice.getFriendlyName());
 
//find devices
DiscoveryAgent agent = localDevice.getDiscoveryAgent();
 
System.out.println("Starting device inquiry...");
agent.startInquiry(DiscoveryAgent.GIAC, client);
 
try {
synchronized(lock){
lock.wait();
}
}
catch (InterruptedException e) {
e.printStackTrace();
}
 
System.out.println("Device Inquiry Completed. ");
 
//print all devices in vecDevices
int deviceCount=vecDevices.size();
 
if(deviceCount <= 0){
System.out.println("No Devices Found .");
System.exit(0);
}
else{
//print bluetooth device addresses and names in the format [ No. address (name) ]
System.out.println("Bluetooth Devices: ");
for (int i = 0; i <deviceCount; i++) {
RemoteDevice remoteDevice=(RemoteDevice)vecDevices.elementAt(i) ;
System.out.println((i+1)+". "+remoteDevice.getBluetoothAddress()+" ("+remoteDevice.getFriendlyName(true)+")");
}
}
 
System.out.print("Choose Device index: ");
BufferedReader bReader=new BufferedReader(new InputStreamReader(System.in));
 
String chosenIndex=bReader.readLine();
int index=Integer.parseInt(chosenIndex.trim());
 
//check for spp service
RemoteDevice remoteDevice=(RemoteDevice)vecDevices.elementAt(in dex-1);
UUID[] uuidSet = new UUID[1];
uuidSet[0]=new UUID("446118f08b1e11e29e960800200c9a66", false);
 
System.out.println("\nSearching for service...");
agent.searchServices(null,uuidSet,remoteDevice,cli ent);
try {
synchronized(lock){
lock.wait();
}
}
catch (InterruptedException e) {
e.printStackTrace();
}
 
if(connectionURL==null){
System.out.println("Device does not support Simple SPP Service.");
System.exit(0);
}
 
//connect to the server and send a line of text
StreamConnection streamConnection=(StreamConnection)Connector.open( connectionURL);
 
//send string
OutputStream outStream=streamConnection.openOutputStream();
PrintWriter pWriter=new PrintWriter(new OutputStreamWriter(outStream));
pWriter.write("Test String from SPP Client\r\n");
pWriter.flush();
 
 
//read response
InputStream inStream=streamConnection.openInputStream();
BufferedReader bReader2=new BufferedReader(new InputStreamReader(inStream));
String lineRead=bReader2.readLine();
System.out.println(lineRead);
}//main
 
//methods of DiscoveryListener
public void deviceDiscovered(RemoteDevice btDevice, DeviceClass cod) {
//add the device to the vector
if(!vecDevices.contains(btDevice)){
vecDevices.addElement(btDevice);
}
}
 
//implement this method since services are not being discovered
public void servicesDiscovered(int transID, ServiceRecord[] servRecord) {
if(servRecord!=null && servRecord.length>0){
connectionURL=servRecord[0].getConnectionURL(0,false);
}
synchronized(lock){
lock.notify();
}
}
 
//implement this method since services are not being discovered
public void serviceSearchCompleted(int transID, int respCode) {
synchronized(lock){
lock.notify();
}
}
 
public void inquiryCompleted(int discType) {
synchronized(lock){
lock.notify();
}
 
}//end method
 
}

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Sorry, is there a way to correct this or do I have to make a new Thread ?

Do you see an "Edit Post" label at the bottom of the post you'd like to change? If so, press that and edit away.

Sorry, this is my first experience with a forum. I have at the beginning the javacode [highlight=Java] and [highlight] at the end inserted but I see no change.

Very close. The ending tag is [/highlight], with the '/' at the beginning.

Thanks