i am new to this serial communication between arduino and java netbeans, i am doing some small project and i need to get data from external EEPROM 24LC256 which is connected to Arduino UNO and pass it to the java net beans plate form not the eclipse, so far i am using RXTX driver to communicate with arduino in java and easily get the data from serial monitor of Arduino IDE.

so any one can help me how can i serially communicate with this external EEPROM using JAVA?? please help me..

any suggestion.. thank you inn advance.. from ten Lobsang

import gnu.io.;import java.util.;import java.io.BufferedReader;import java.io.InputStreamReader;import java.io.OutputStream;import gnu.io.CommPortIdentifier;import gnu.io.SerialPort;import gnu.io.SerialPortEvent;import gnu.io.SerialPortEventListener; import java.util.Enumeration;

public class last extends javax.swing.JFrame implements SerialPortEventListener { SerialPort serialPort; private static final String PORT_NAMES[] = { "COM3", // Windows }; private BufferedReader input;
private OutputStream output; /** The output stream to the port / private static final int TIME_OUT = 2000; /* Milliseconds to block while waiting for port open / private static final int DATA_RATE = 9600; /* Default bits per second for COM port. */ public void initialize() { CommPortIdentifier portId = null; Enumeration portEnum = CommPortIdentifier.getPortIdentifiers();

    while (portEnum.hasMoreElements()) {   //First, Find an instance of serial port as set in PORT_NAMES.
        CommPortIdentifier currPortId = (CommPortIdentifier) portEnum.nextElement();
        for (String portName : PORT_NAMES) {
            if (currPortId.getName().equals(portName)) {
                portId = currPortId;
                break;
            }}}
    if (portId == null) {
        System.out.println("Could not find COM port.");
        return;
    }

try { // open serial port, and use class name for the appName. serialPort = (SerialPort) portId.open(this.getClass().getName(), TIME_OUT); serialPort.setSerialPortParams(DATA_RATE, // set port parameters SerialPort.DATABITS_8, SerialPort.STOPBITS_1, SerialPort.PARITY_NONE);

                    input = new BufferedReader(new InputStreamReader(serialPort.getInputStream()));   // open the streams
        output = serialPort.getOutputStream();
                    serialPort.addEventListener(this);      // add event listeners
        serialPort.notifyOnDataAvailable(true);
    } catch (Exception e) {
        System.err.println(e.toString());
    }}

/**
 * This should be called when you stop using the port.
 * This will prevent port locking on platforms like Linux.
 */
public synchronized void close() {                      
    if (serialPort != null) {
        serialPort.removeEventListener();
        serialPort.close();
    }}

/**
 * Handle an event on the serial port. Read the data and print it.
 */
public synchronized void serialEvent(SerialPortEvent oEvent) {
    if (oEvent.getEventType() == SerialPortEvent.DATA_AVAILABLE) {
        try {
            String inputLine=input.readLine();
            System.out.println("the state of the led is  "+inputLine);
        } catch (Exception e) {
            System.err.println(e.toString());
        }
    }
    // Ignore all the other eventTypes, but you should consider the other ones.
}

public static void main(String[] args)
            throws Exception {
    last main = new last();
    main.initialize();
    Thread t=new Thread() {
        public void run() { //the following line will keep this app alive for 1000 seconds,
            //waiting for events to occur and responding to them (printing incoming messages to console).
            try {Thread.sleep(1000000);} catch (InterruptedException ie) {}
        }
    };
    t.start();
    System.out.println("Started");
}}

those are code in java netbeans

I am new to this serial communication between Arduino and Java NetBeans. I am doing some small project and I need to get data from external EEPROM 24LC256 which is connected to Arduino UNO and pass it to the Java NetBeans platform not the Eclipse. So far I am using RXTX driver to communicate with Arduino in Java and easily get the data from serial monitor of Arduino IDE.

So can anyone help me, on how can I serially communicate with this external EEPROM using Java?

import gnu.io.*;
import java.util.*;
import java.io.BufferedReader;
import java.io.InputStreamReader;
import java.io.OutputStream;
import gnu.io.CommPortIdentifier;
import gnu.io.SerialPort;
import gnu.io.SerialPortEvent;
import gnu.io.SerialPortEventListener;
import java.util.Enumeration; 

public class last extends javax.swing.JFrame implements SerialPortEventListener  {
    SerialPort serialPort;
    private static final String PORT_NAMES[] = { 
        "COM3", // Windows
    };
    private BufferedReader input;  
    private OutputStream output;   /** The output stream to the port */
    private static final int TIME_OUT = 2000; /** Milliseconds to block while waiting for port open */
    private static final int DATA_RATE = 9600;  /** Default bits per second for COM port. */
    public void initialize() {
        CommPortIdentifier portId = null;
        Enumeration portEnum = CommPortIdentifier.getPortIdentifiers();

        while (portEnum.hasMoreElements()) {   //First, Find an instance of serial port as set in PORT_NAMES.
            CommPortIdentifier currPortId = (CommPortIdentifier) portEnum.nextElement();
            for (String portName : PORT_NAMES) {
                if (currPortId.getName().equals(portName)) {
                    portId = currPortId;
                    break;
                }
            }
        }
        if (portId == null) {
            System.out.println("Could not find COM port.");
            return;
        }
        try {          // open serial port, and use class name for the appName.
            serialPort = (SerialPort) portId.open(this.getClass().getName(), TIME_OUT);
            serialPort.setSerialPortParams(DATA_RATE,  // set port parameters
                    SerialPort.DATABITS_8,
                    SerialPort.STOPBITS_1,
                    SerialPort.PARITY_NONE);

            input = new BufferedReader(new InputStreamReader(serialPort.getInputStream()));   // open the streams
            output = serialPort.getOutputStream();
            serialPort.addEventListener(this);   // add event listeners
            serialPort.notifyOnDataAvailable(true);
        } catch (Exception e) {
            System.err.println(e.toString());
        }}

    /**
     * This should be called when you stop using the port.
     * This will prevent port locking on platforms like Linux.
     */
    public synchronized void close() {                      
        if (serialPort != null) {
            serialPort.removeEventListener();
            serialPort.close();
        }}

    /**
     * Handle an event on the serial port. Read the data and print it.
     */
    public synchronized void serialEvent(SerialPortEvent oEvent) {
        if (oEvent.getEventType() == SerialPortEvent.DATA_AVAILABLE) {
            try {
                String inputLine=input.readLine();
                System.out.println("the state of the led is  "+inputLine);
            } catch (Exception e) {
                System.err.println(e.toString());
            }
        }
        // Ignore all the other eventTypes, but you should consider the other ones.
    }

    public static void main(String[] args) throws Exception {
        last main = new last();
        main.initialize();
        Thread t = new Thread() {
            public void run() { //the following line will keep this app alive for 1000 seconds,
                //waiting for events to occur and responding to them (printing incoming messages to console).
                try {Thread.sleep(1000000);} catch (InterruptedException ie) {}
            }
        };
        t.start();
        System.out.println("Started");
    } 
}

This is the code in Java NetBeans.

import gnu.io.;import java.util.;import java.io.BufferedReader;import java.io.InputStreamReader;import java.io.OutputStream;import gnu.io.CommPortIdentifier;import gnu.io.SerialPort;import gnu.io.SerialPortEvent;import gnu.io.SerialPortEventListener; import java.util.Enumeration;

public class last extends javax.swing.JFrame implements SerialPortEventListener { SerialPort serialPort; private static final String PORT_NAMES[] = { "COM3", // Windows }; private BufferedReader input;
private OutputStream output; /** The output stream to the port / private static final int TIME_OUT = 2000; /* Milliseconds to block while waiting for port open / private static final int DATA_RATE = 9600; /* Default bits per second for COM port. */ public void initialize() { CommPortIdentifier portId = null; Enumeration portEnum = CommPortIdentifier.getPortIdentifiers();

    while (portEnum.hasMoreElements()) {   //First, Find an instance of serial port as set in PORT_NAMES.
        CommPortIdentifier currPortId = (CommPortIdentifier) portEnum.nextElement();
        for (String portName : PORT_NAMES) {
            if (currPortId.getName().equals(portName)) {
                portId = currPortId;
                break;
            }}}
    if (portId == null) {
        System.out.println("Could not find COM port.");
        return;
    }

try { // open serial port, and use class name for the appName. serialPort = (SerialPort) portId.open(this.getClass().getName(), TIME_OUT); serialPort.setSerialPortParams(DATA_RATE, // set port parameters SerialPort.DATABITS_8, SerialPort.STOPBITS_1, SerialPort.PARITY_NONE);

                    input = new BufferedReader(new InputStreamReader(serialPort.getInputStream()));   // open the streams
        output = serialPort.getOutputStream();
                    serialPort.addEventListener(this);      // add event listeners
        serialPort.notifyOnDataAvailable(true);
    } catch (Exception e) {
        System.err.println(e.toString());
    }}

/**
 * This should be called when you stop using the port.
 * This will prevent port locking on platforms like Linux.
 */
public synchronized void close() {                      
    if (serialPort != null) {
        serialPort.removeEventListener();
        serialPort.close();
    }}

/**
 * Handle an event on the serial port. Read the data and print it.
 */
public synchronized void serialEvent(SerialPortEvent oEvent) {
    if (oEvent.getEventType() == SerialPortEvent.DATA_AVAILABLE) {
        try {
            String inputLine=input.readLine();
            System.out.println("the state of the led is  "+inputLine);
        } catch (Exception e) {
            System.err.println(e.toString());
        }
    }
    // Ignore all the other eventTypes, but you should consider the other ones.
}

public static void main(String[] args)
            throws Exception {
    last main = new last();
    main.initialize();
    Thread t=new Thread() {
        public void run() { //the following line will keep this app alive for 1000 seconds,
            //waiting for events to occur and responding to them (printing incoming messages to console).
            try {Thread.sleep(1000000);} catch (InterruptedException ie) {}
        }
    };
    t.start();
    System.out.println("Started");
}}

those are code in java netbeans