AT Commando sent, responce from device ends with ERROR

[Skywalker75]

Hi there,

i need some help using AT codes . In summary i need the manufacturer, imei (if supported) and the modelname of the device.

I have simultanusly run a Sniffer who give me the request and response through the Bluetooth device and i can read that the resonse of the device is an "ERROR". I dont know actual what i can do or what my mistake is in thinking about the procedure and hope you can help me out. I tried it with a wait(500) after every flush() if the device need some time to response, but it was useless.

Here my print of the sniffer:

13,182 Master 46 AT+GMM. 20 16.07.2010 10:42:19.4911
13,191 Slave 46 ..ERROR.. 22 00:00:00.0930 16.07.2010 10:42:19.5841


Now my actual code snippet im using but i only get an empty String in lineRead.

public static void main(String[] args) throws IOException, InterruptedException {

        int index = ServicesSearch.element.indexOf("BT_HFP_AG");
        String conStr = ServicesSearch.serviceFound.elementAt(index);
        StreamConnection con = (StreamConnection)Connector.open(conStr);

        communicate( con);
    }

    private static void communicate(StreamConnection con) throws InterruptedException {
        try{
            OutputStream out = con.openOutputStream();
            InputStream in = con.openInputStream();
            
            // send String
            PrintWriter pWriter = new PrintWriter(new OutputStreamWriter(out));
            pWriter.write("AT+GMM\r"); // for the modelname
            pWriter.flush();
            pWriter.write("AT+CGMI\r"); // for the manufacturer
            pWriter.flush();
            pWriter.write("AT+CGSN\r");  // for the IMEI
            pWriter.flush();

            BufferedReader bReader = new BufferedReader(new InputStreamReader(in));
            String lineRead = bReader.readLine();
            System.out.println("AG: " + lineRead);
            
            out.close(); in.close(); con.close();
        }
        catch(IOException ioe){
        }
    }

Thanks for help and hopeful to find a solution

If questions are open ask me pls i need all help i can get and want give any answer who is helpful.
greetings

Skywalker

P.S.: I have read the other two threads about AT commandos but wasnt a success.

[traud]

Does this help? The first line is empty, therefore you get an empty String.

I have read the other two threads about AT commandos but wasnt a success.

Why did you not link them, so we know which you are referring to?

[Skywalker75]

Hi Traud and thx for answer.
One thread was your actual posted. The other one i dont know more.
Meantime i found that i have to send a couple of commands in order to get a right answer. There are more than 10 commands i have to send i think before i can get the manufacturer and IMEI. The joke is, i tried it with a Sony Ericsson and it was a success. I got the manufacturer, model and the imei. After that i tried it with other phones. By the LG KC780 i dont got any profiles with profile browsing, i think the command isnt mandatory only optional and this LG don't support it, damn. The Samsung, here a SGH-i8510, ends with an exception (Error: Failed to read(byte[]); [10053] An established connection was aborted by the software in your host machine.) I got the profiles but to establish a HFP-Connection it came to this error after i have sent the first AT-command.
Now i am at a hard point for my software to find a good and going solution.

If you wonder why i have so many loops of lineRead. I need it to get all the answers because if i only try a lineRead after the right at-command, the stream has a answer from a at-command before, the answer is slower so i have count all answers in my sniffer to find the lineread where the right data are in. I hope you understand my english

I know that this solution dont work, because the answers differs from phone to phone. It is actual only a solution for my own Sony Ericsson K750 phone.

Here now my actual code of the hfp-connection.

    public static void main(String[] args) throws IOException, InterruptedException {

        int test = ServicesSearch.element.size();
        System.out.println("size: " + test);
        int index = ServicesSearch.element.indexOf("BT_HFP_AG");
        System.out.println("index: " + index);
        String conStr = ServicesSearch.serviceFound.elementAt(index);
        StreamConnection con = (StreamConnection)Connector.open(conStr);

        communicate( con);
    }

    private static void communicate(StreamConnection con) throws InterruptedException {
        try{
            OutputStream out = con.openOutputStream();
            InputStream in = con.openInputStream();

            PrintWriter pWriter = new PrintWriter(new OutputStreamWriter(out));
            BufferedReader bReader = new BufferedReader(new InputStreamReader(in));
            pWriter.write("AT+BRSF=7\r");                             //Retrieve AG Supported Features
            pWriter.flush();
            wait(1000);
            lineRead = null;
            while(lineRead == null || lineRead.isEmpty()){           // my actual solution waiting for the answer of the phone
                lineRead = bReader.readLine();                               // to fill the stream
            }
            lineRead = null;
            while(lineRead == null || lineRead.isEmpty()){         // there are more answers i need so i have to got all i think
                lineRead = bReader.readLine();
            }
            
            pWriter.write("AT+CIND=?\r");                          //Get supported indicators
            pWriter.flush();
            wait(1000);
            lineRead = "";
            lineRead = bReader.readLine();
            while(lineRead == null || lineRead.isEmpty()){       //waiting for the first answer of AT+CIND=?
                lineRead = bReader.readLine();
            }
            lineRead = "";
            lineRead = bReader.readLine();
            while(lineRead == null || lineRead.isEmpty()){       // the second answer
                lineRead = bReader.readLine();
            }
            pWriter.write("AT+CIND?\r");
            pWriter.flush();
            wait(1000);
            lineRead = "";
            while(lineRead == null || lineRead.isEmpty()){
                lineRead = bReader.readLine();
            }
            lineRead = "";
            lineRead = bReader.readLine();
            while(lineRead == null || lineRead.isEmpty()){
                lineRead = bReader.readLine();
            }
            pWriter.write("AT+CMER=3,0,0,1\r");
            pWriter.flush();
            wait(1000);

            lineRead = "";
            while(lineRead == null || lineRead.isEmpty()){
                lineRead = bReader.readLine();
            }
            pWriter.write("AT+CHLD=?\r");
            pWriter.flush();
            wait(1000);
            lineRead = "";
            lineRead = bReader.readLine();
            while(lineRead == null || lineRead.isEmpty()){
                lineRead = bReader.readLine();
            }
            lineRead = "";
            lineRead = bReader.readLine();
            while(lineRead == null || lineRead.isEmpty()){
                lineRead = bReader.readLine();
            }

            ...... here are more lineRead Loops ........
.......
.......

            pWriter.write("AT+CGMI\r");                                   // this command sends the manufacturer
            pWriter.flush();
            wait(500);

            pWriter.write("AT+GMM\r");                                     //this command sends the model
            pWriter.flush();
            wait(500);
            lineRead = null;
            while(lineRead == null || lineRead.isEmpty()){
                lineRead = bReader.readLine();
            }
            String manufacturer = lineRead;
            System.out.println("Manufacturer: " + manufacturer);
            lineRead = "";
            lineRead = bReader.readLine();
            while(lineRead == null || lineRead.isEmpty()){
                lineRead = bReader.readLine();
            }
            pWriter.write("AT+GMR\r");
            pWriter.flush();
            wait(500);

            lineRead = null;
            while(lineRead == null || lineRead.isEmpty()){
                lineRead = bReader.readLine();
            }
            lineRead = "";
            lineRead = bReader.readLine();
            while(lineRead == null || lineRead.isEmpty()){
                lineRead = bReader.readLine();
            }
            String model = lineRead;
            System.out.println("ModelName: " + model);
            lineRead = "";
            lineRead = bReader.readLine();
            while(lineRead == null || lineRead.isEmpty()){
                lineRead = bReader.readLine();
            }
            pWriter.write("AT+NREC=0\r");
            pWriter.flush();
            wait(500);
            lineRead = "";
            lineRead = bReader.readLine();
            while(lineRead == null || lineRead.isEmpty()){
                lineRead = bReader.readLine();
            }
            pWriter.write("AT+CMEE=1\r");
            pWriter.flush();
            wait(500);
            lineRead = "";
            lineRead = bReader.readLine();
            while(lineRead == null || lineRead.isEmpty()){
                lineRead = bReader.readLine();
            }
            lineRead = "";
            lineRead = bReader.readLine();
            while(lineRead == null || lineRead.isEmpty()){
                lineRead = bReader.readLine();
            }
            lineRead = "";
            lineRead = bReader.readLine();
            while(lineRead == null || lineRead.isEmpty()){
                lineRead = bReader.readLine();
            }

            pWriter.write("AT+CLIP=1\r");
            pWriter.flush();
            wait(500);
            lineRead = "";
            lineRead = bReader.readLine();
            while(lineRead == null || lineRead.isEmpty()){
                lineRead = bReader.readLine();
            }

            pWriter.write("AT+CGSN\r");                                            // this command sends the IMEI
            pWriter.flush();
            wait(500);
            lineRead = null;
            while(lineRead == null || lineRead.isEmpty()){
                lineRead = bReader.readLine();
            }
            lineRead = "";
            lineRead = bReader.readLine();
            while(lineRead == null || lineRead.isEmpty()){
                lineRead = bReader.readLine();
            }
            lineRead = "";
            lineRead = bReader.readLine();
            while(lineRead == null || lineRead.isEmpty()){
                lineRead = bReader.readLine();
            }
//            System.out.println("AG: " + lineRead);
            pWriter.write("AT+CCWA=1\r");
            pWriter.flush();
            wait(500);

//            lineRead += bReader.readLine();
            pWriter.write("AT+CMGF=0\r");
            pWriter.flush();
            wait(500);
            lineRead = null;
            while(lineRead == null || lineRead.isEmpty()){
                lineRead = bReader.readLine();
            }
            lineRead = null;
            while(lineRead == null || lineRead.isEmpty()){
                lineRead = bReader.readLine();
            }
                        lineRead = null;
            while(lineRead == null || lineRead.isEmpty()){
                lineRead = bReader.readLine();
            }
            String IMEI = lineRead;
            System.out.println("IMEI: " + IMEI);

            out.close(); in.close(); con.close();
        }
        catch(IOException ioe){
            System.out.println("Error: " + ioe.getMessage());
            try {
                con.close();
            } catch (IOException ex) {
                Logger.getLogger(HFPConnection.class.getName()).log(Level.SEVERE, null, ex);
            }
        }
    }

I know that this is a bad written code but i am learning actual java and in this case i have often no idea how i can write the right code or routines.

Greetings
Skywalker