Simulando um hyper terminal

Programação Java
#1

Ola, estou tentando estabelecer uma conexao com o meu modem usando a API javax.comm

A conexão deveria ser semelhante ao hyper terminal, aonde eu posso enviar comandos AT e esperar a resposta do modem aos comando que eu envio.

Eu consegui estabelecer conexao mas nao consigo enviar os comando AT e verificar a resposta.

Segue abaixo o codigo que obtive no proprio site da sun

Desde ja muito obrigado



public class SimpleWrite {
	
	private static String messageString = "ATD 50841134"; //Liga para este numero
	
	public static void main(String[] args) {
		SerialPort serialPort = null;
		OutputStream outputStream = null;
		
		try {
			CommPortIdentifier portId = CommPortIdentifier.getPortIdentifier("COM5");
			serialPort = (SerialPort) portId.open("SimpleWrite",2000);
			outputStream = serialPort.getOutputStream();
			
			serialPort.setSerialPortParams(9600,
					SerialPort.DATABITS_8, 
					SerialPort.STOPBITS_1,
					SerialPort.PARITY_NONE);
			
			serialPort.notifyOnOutputEmpty(true);
			outputStream.write(messageString.getBytes());
			Thread.sleep(2000); // Be sure data is xferred before closing
			
		} catch (PortInUseException e) {
		} catch (IOException e) {
		} catch (UnsupportedCommOperationException e) {
		} catch (Exception e) {
		}
		
		serialPort.close();
		System.exit(1);
	}
}




public class SimpleRead implements Runnable, SerialPortEventListener {
	
	private static final Logger logger = Util.startLogger(SimpleRead.class,"simpleReadLog");
	
	static CommPortIdentifier portId;
	InputStream inputStream;
	SerialPort serialPort;
	Thread readThread;

	public static void main(String[] args) {
		try {
			portId = CommPortIdentifier.getPortIdentifier("COM5");
			SimpleRead reader = new SimpleRead();
		} catch (NoSuchPortException e) {
			e.printStackTrace();
		}
	}

	public SimpleRead() {
		try {
			serialPort = (SerialPort) portId.open("SimpleReadApp", 2000);
			inputStream = serialPort.getInputStream();
			serialPort.addEventListener(this);
			serialPort.notifyOnDataAvailable(true);
			serialPort.setSerialPortParams(9600, 
					SerialPort.DATABITS_8,
					SerialPort.STOPBITS_1, 
					SerialPort.PARITY_NONE);
		} catch (PortInUseException e) {
		} catch (IOException e) {
		} catch (TooManyListenersException e) {
		} catch (UnsupportedCommOperationException e) {
		}

		readThread = new Thread(this);
		readThread.start();
	}

	public void run() {
		try {
			Thread.sleep(20000);
		} catch (InterruptedException e) {
		}
	}

	public void serialEvent(SerialPortEvent event) {
		
		switch (event.getEventType()) {
			case SerialPortEvent.BI:
			case SerialPortEvent.OE:
			case SerialPortEvent.FE:
			case SerialPortEvent.PE:
			case SerialPortEvent.CD:
			case SerialPortEvent.CTS:
			case SerialPortEvent.DSR:
			case SerialPortEvent.RI:
			case SerialPortEvent.OUTPUT_BUFFER_EMPTY:
				break;

			case SerialPortEvent.DATA_AVAILABLE:
				byte[] readBuffer = new byte[20];
	
				try {
					while (inputStream.available() &gt 0)
						inputStream.read(readBuffer);
	
					logger.info(new String(readBuffer));
				} catch (IOException e) {
					e.printStackTrace();
				}
	
				break;
		}
	}
}
#2