Serial Port

[radhika]

i am a new in serial port topic ,i know the concept read & write port on my pc
now i want to implement in my project,i need help how can i access the serial port in remote system

please any one help for me

advance thanks

regards
R.Radhika

[radhika]

how can i access the serial port in remote system

[levent]

Hi Radhika,

First of all i moved your thread to "New To Java" forum since it was not appropriate for "Java Announcements" forum.

Your problem has two parts:

1. Controlling serial port on a machine

For this part, you will need Java Communications API. Its installation can be a little bit problematic. It is important to find a working tutorial for it. I dont remember which one i used so you need to find your way yourself. But you can start with installation instructions there.

2. Accessing a serial port on a remote machine

After you set up Java Communications API on the remote machine, you will need to develop a server application because you need to control a remote machine and to do this, you should have both client and server.

For client-server programming you can use socket programming or RMI (Remote Method Invocation). If you want to use a web based interface, then you can use Servlets to develop your server application and use your browser as the client application.

Let us know if you have further problems..

[dnsunil]

Does anybody implemented accesing serial port on a remote machine? Please share the information that would be really beneficial to me.

[hobbyist]

I also have an issue with serial comm API.
I am trying to write a JavaSE application using Swing to access the virtual COM port created when connecting a Modem aware device to the USB.
I can see data coming across via Hyperterminal and I want to write a hyperterminal type application to react to and filter messaging.
I have tried using the Comm API and followed in the API instructions to the letter.
I am using the following code in my JavaSE app:

{
...
private void initCommPorts() {
CommPortIdentifier portId;
Enumeration portList = CommPortIdentifier.getPortIdentifiers();
if (portList == null) {
System.out.println("portList is null");
}
else {
System.out.println(portList.toString());
}

String comPort = "";
while (portList.hasMoreElements()) {
portId = (CommPortIdentifier) portList.nextElement();
System.out.print("Port found");
comPort = portId.getName();
System.out.println("Found port: " + comPort);
// Add COM port to visual object selection list
comChoice.addItem(comPort);
}

}
...
}

The issue is that this code never finds the COM port. The Enumeration is always empty.

Am I using the right API here. Can the Comm API be used to create a connection to the virtual COM ports in Windows XP?

Thanks guys - and sorry for my ignorance on this matter!

[pawanpugliya]

I downloaded java comm api and copied files into jdk folder correctly. But

portList.hasMoreElements()

is returning false.
Plz suggest any measures to solve the problem.