Examples of lejos.nxt.comm.BTConnection

lejos.nxt.comm.BTConnection
Provides a Bluetooth connection Supports both packetized, raw and stream based communincation. Blocking and non-blocking I/O. Notes: Because of the limited buffer space and the way that several connections have to share the interface to the Bluetooth device data may be lost. This will happen if a switch into command mode is required when there is data arriving from the remote connection that can not be placed into the input buffer. Every attempt is made to avoid this but it can happen. Application programs can help avoid this problem by: 1) Using just a single Bluetooth connection 2) Using Bluetooth commands while data transfers are in progress. 3) Performing application level flow control to avoid more then 256 bytes of data being sent from the remote side at any one time. 4) Reading any pending data as soon as possible. If data is lost then calls to read and write will return -2 to indicate the problem. If using packet mode then the input stream can be re-synchronized by issuing a read to discard the partial packet which may be in the input buffer. When operating in RAW mode bytes are read/written as is. This mode is useful for talking to none leJOS/Lego devices. When operating in PACKET mode the standard Lego 2 byte header is added to each packet (and is expected to be present on each incoming packet). Use this mode when talking to other leJOS/Lego devices.


  /**
   * Sets node in waiting for connection mode.
   */
  public BTConnection connect() {
    BTConnection btc = null;
    System.out.println("Wait for connection...");
    while (true) {
      btc = Bluetooth.waitForConnection();
      if (btc == null) {
        System.out.println("No connection!");
        continue;
      }
      System.out.println("Connected.");
      btc.setIOMode(NXTConnection.RAW);
      break;
    }
    return btc;
  }

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  /**
   * Connects to node as master
   */
  public BTConnection connect(){
    BTConnection btc = null;


    RemoteDevice btrd = remoteNode.getRemoteDevice();


    int iCount = 0;
    while (true) {
      if(iCount==10) {
        iCount = 3;
      }
      else {
        iCount++;
      }
      if (btrd == null) {
        System.out.println("No such device!");
        continue;
      }


      btc = Bluetooth.connect(btrd);




      if (btc == null) {
        System.out.println("Connect "+remoteNode.getName()+" failed");
        try{
          Thread.sleep(iCount*1000);
        }catch(Exception e) {
          System.out.println("sleep problems");
        }
        continue;
      }
      else{
        System.out.println("Connected to "+remoteNode.getName()+".");
        btc.setIOMode(NXTConnection.RAW);
        break;
      }
    }
    
    return btc;

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  /**
   * Sets node in waiting for connection mode.
   */
  public BTConnection connect() {
    BTConnection btc = null;
    System.out.println("Wait for connection...");
    while (true) {
      btc = Bluetooth.waitForConnection();
      if (btc == null) {
        System.out.println("No connection!");
        continue;
      }
      System.out.println("Connected.");
      btc.setIOMode(NXTConnection.RAW);
      break;
    }
    return btc;
  }

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   * Connects to node as master
   * 
   * @param Node
   */
  public BTConnection connect(){
    BTConnection btc = null;


    RemoteDevice btrd = remoteNode.getRemoteDevice();
    int iCount = 0;
    while (true) {
      if(iCount==10) {
        iCount = 3;
      }
      else {
        iCount++;
      }
      if (btrd == null) {
        System.out.println("No such device!");
        continue;
      }
      
      btc = Bluetooth.connect(btrd);
      
      
      if (btc == null) {
        System.out.println("Connect "+remoteNode.getName()+" failed");
        try{
          Thread.sleep(iCount*1000);
        }catch(Exception e) {
          System.out.println("sleep problems");
        }
        continue;
        
      }
      else{
      System.out.println("Connected to "+remoteNode.getName()+".");
      btc.setIOMode(NXTConnection.RAW);
      break;
      }
    }
    return btc;
  }

View Full Code Here

  
  private static void draw() throws IOException {
    // Wait for connection
    LCD.drawString("Menunggu koneksi", 0, 0);
    LCD.refresh();
    BTConnection btc = Bluetooth.waitForConnection();
    
    DataInputStream dis = btc.openDataInputStream();
    
    LCD.clearDisplay();
    LCD.drawString("Sudah dapat koneksi", 0, 0);
    LCD.refresh();

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  private static void connect() {
    try {
      LCD.drawString("Menunggu koneksi", 0, 0);
      LCD.refresh();
      BTConnection btc = Bluetooth.waitForConnection();


      DataInputStream dis = btc.openDataInputStream();


      LCD.drawString("Sudah dapat koneksi", 0, 1);
      LCD.refresh();


      char read = dis.readChar();
      String arah = "";


      LCD.drawString("Pesan : " + read, 0, 2);
      LCD.refresh();


      while (read != 'e') {
        // Ambil semua petunjuk arah dari Hayate sampai karakter
        // sentinel
        arah += read;
        read = dis.readChar();
      }


      dis.close();
      btc.close();
      LCD.drawString("Arah " + arah, 0, 0);
      LCD.refresh();
//      jalan("" + arah);


    } catch (Exception e) {

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                            '0', '0', '0', '0'
                        };
                        byte[] pin = enterNumber(4, "PIN for " + btrd.getFriendlyName(false), tempPin); // !! Assuming 4 length
                        if (pin == null) break;
                        LCD.drawString("Please wait...", 0, 6);
                        BTConnection connection = Bluetooth.connect(btrd.getDeviceAddr(), 0, pin);
                        // Indicate Success or failure:
                        if (connection != null)
                        {
                            LCD.drawString("Paired!      ", 0, 6);
                            connection.close();
                        }
                        else
                        {
                            LCD.drawString("UNSUCCESSFUL  ", 0, 6);
                            Bluetooth.removeDevice(btrd);

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   * into a BTConnection object. However, how to pull information 
   * from it, such as friendly name, address, etc... ??
   * Solution: Add address to BTConnection class?
   */
  public static RemoteDevice getRemoteDevice(Connection conn) throws IOException {
    BTConnection btc = (BTConnection)conn;
    return new RemoteDevice(btc.getAddress());
  }

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    if (partner == null) {
      LCD.drawString("partner tidak ketemu", 0, 4);
      LCD.refresh();
      return false;
    }
    BTConnection btc = Bluetooth.connect(partner);
    if (btc == null) {
      LCD.drawString("tidak bisa nyambung", 0, 5);
      LCD.refresh();
      return false;
    }
    LCD.drawString("Mulai mengirim", 0, 6);
    LCD.refresh();
    DataOutputStream dos = btc.openDataOutputStream();
    for (int i = 0; i < pesan.length(); i++) {
      char a = pesan.charAt(i);
      LCD.drawString("Yang dikirim " + a, 0, 2);
      dos.writeChar(a);
      // dos.writeInt(a);
      dos.flush();
    }
    dos.writeChar('e');
    dos.flush();
    dos.close();
    LCD.drawString("Selesai mengirim", 0, 7);
    btc.close();


    return true;
  }

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  private static void connect() {
    try {
      LCD.drawString("Menunggu koneksi", 0, 0);
      LCD.refresh();
      BTConnection btc = Bluetooth.waitForConnection();


      DataInputStream dis = btc.openDataInputStream();


      LCD.drawString("Sudah dapat koneksi", 0, 1);
      LCD.refresh();


      int read = dis.readInt();
      String arah = "";


      LCD.drawString("Pesan : " + read, 0, 2);
      LCD.refresh();


      while (read != 8) {
        // Ambil semua petunjuk arah dari Hayate sampai karakter
        // sentinel
        arah += read;
        read = dis.readInt();
      }


      dis.close();
      btc.close();
      LCD.drawString("Arah " + arah, 0, 0);
      LCD.refresh();
      jalan("" + arah);


    } catch (Exception e) {

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Related Classes of lejos.nxt.comm.BTConnection

communication.MasterConnection

communication.SlaveConnection

StartUpText

TemanTotoro

Totoro

javax.bluetooth.RemoteDevice

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