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Thread: String +DatagramPacket+ Android + Arduino

  1. #1
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    Default String +DatagramPacket+ Android + Arduino

    what I want to do is, if I use send.setOnClickListener(new OnClickListener) to send stringdata1 + stringdata1 over the DatagramSocket to an Arduino Board, but I donīt know how to convert the two Strings and send them
    please help me
    thanks in Advance
    ////////////////////////////////////////////////////////////
    Code 1
    ////////////////////////////////////////////////////////////
    send.setOnClickListener(new OnClickListener() {
     
    			public void onClick(View v) {
    					SendSlcValue.setintData();
    					SendSlcValue.updateArduinoValues();
    					;
    ////////////////////////////////////////////////////////////
    Code 2
    ////////////////////////////////////////////////////////////
    public class SendSlcValue {
    	static DatagramSocket socket;
    	  static byte data[];
     
    	  static {
    	    data = new byte[700];
    	    try {
    	      socket = new DatagramSocket();
    	    } catch (SocketException e1) {
    	      e1.printStackTrace();
    	    }
    	  }
     
    	  public static void updateArduinoValues() {
    	    Thread t = new Thread(new Runnable() {
     
    	      @Override
    	      public void run() {
    	        try {
    	          InetAddress serverIP = InetAddress
    	              .getByName("255.255.255.255");
     
    	          DatagramPacket out = new DatagramPacket(data, data.length,
    	              serverIP, 50025);
     
    	          socket.send(out);
    	        } catch (IOException e) {
    	          e.printStackTrace();
    	        }
     
    	      }
    	    });
    	    t.start();
    	  }
     
    	  public static void setintData(byte val_onoff) {
     
     
     
     
    		    String stringdata1 = "0020 0020";
    		    byte[] byteData1 = stringdata1.getBytes();
     
                        String stringdata2 = "0000 0071 0000 000c 0020 0020 0020 0020 0020 0020 0020 0020 0020 0020 0040 0040 0020 0020 0020 0020 0020 0020 0040 0020 0020 0040 0020 0ca0";
    		    byte[] byteData2 = stringdata2.getBytes();
    Last edited by mani3321; March 19th, 2014 at 08:41 AM.


  2. #2
    Super Moderator Norm's Avatar
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    Default Re: String +DatagramPacket+ Android + Arduino

    how to convert the two Strings
    Can you explain what the problem is? The byte arrays can go in a DatagramPacket for sending.
    If you don't understand my answer, don't ignore it, ask a question.

  3. #3
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    Default Re: String +DatagramPacket+ Android + Arduino

    if I send the byteData1 instead of data I don`t see anything on the arduino Serial Monitor
    but if I use this code
    ////////////////////
    Code 1
    ////////////////////
    public class MainActivity extends Activity {
    	public Button send; 
    	public TextView tv;
    	public TextView etcode;
    	String test = new String("test");
    	@Override
    	protected void onCreate(Bundle savedInstanceState) {
    		super.onCreate(savedInstanceState);
    		setContentView(R.layout.activity_main);
    		send = (Button) findViewById(R.id.Senden);
     
     
     
    		////////////////////////////
    		send.setOnClickListener(new OnClickListener() {
     
    			public void onClick(View v) {
    					SendSlcValue.setintData((byte)1);
    					SendSlcValue.updateArduinoValues();
    					;	
    			}
    		});
    	}
    }
    ///////////////////////
    code 2
    ///////////////////////
    public class SendSlcValue {
    	static DatagramSocket socket;
    	  static byte data[];
     
    	  static {
    	    data = new byte[700];
    	    try {
    	      socket = new DatagramSocket();
    	    } catch (SocketException e1) {
    	      e1.printStackTrace();
    	    }
    	  }
     
    	  public static void updateArduinoValues() {
    	    Thread t = new Thread(new Runnable() {
     
    	      @Override
    	      public void run() {
    	        try {
    	          InetAddress serverIP = InetAddress
    	              .getByName("255.255.255.255");
     
    	          byte[] byteData = null;
    			DatagramPacket out = new DatagramPacket(byteData, data.length,
    	              serverIP, 50025);
     
    	          socket.send(out);
    	        } catch (IOException e) {
    	          e.printStackTrace();
    	        }
     
    	      }
    	    });
    	    t.start();
    	  }
     
    public static void setintData(byte intensity) {
    		data[5] = intensity;
     
     
    }

    //////////////////////

    ///////////////////
    I see the 6 on the arduino Serial Monitor


    My Problem is I don`t know how I have to connect the stringdata1 and stringdata2 with data to see anything on the Serial Monitor
    Last edited by mani3321; March 19th, 2014 at 08:46 AM.

  4. #4
    Super Moderator Norm's Avatar
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    Default Re: String +DatagramPacket+ Android + Arduino

    Please edit your post and wrap your code with code tags:
    [code]
    YOUR CODE HERE
    [/code]
    to get highlighting and preserve formatting.

    Sorry, I don't understand the little bits of code that was posted. Too many things are not defined.
    If you don't understand my answer, don't ignore it, ask a question.

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