CODEWITHSUNDEEP
javaserial-port
Mayank
Mayank

Reputation: 816

Reading data from Serial port

I have a requirement where i have to read data streams coming on serial port. I am using javax.comm API for same.

When I try to list ports, using below code I never get any port list.

portList = CommPortIdentifier.getPortIdentifiers();
System.out.println("start: "+portList.hasMoreElements());

It returns false.

Can anyone help me if I am missing anything?

My PS2 port didn't came in list. Is there any other way to list PS2 port??

My full code is as below,

    while (portList.hasMoreElements()) {
       portId = (CommPortIdentifier) portList.nextElement();
       System.out.println("portid: "+portId.getName());
    }

output

portid: COM1
portid: COM3
portid: LPT1

My actual requirement is to read data on USB port. I was facing issues using JUSB and it didn't work. So I decided to get serial to USb converter and read on serial port. But, there is no such convertable available in market.

Now, thinking of another work around I was able to get a PS2 to usb converter. It would be great if you could help me listing PS2 port using Java and read/write to it or suggest some API for same on windows platform.

Any help in this regard is highly appreciated.

Upvotes: 1

Views: 5541

Answers (3)

Marcelo Amorim
Marcelo Amorim

Reputation: 1682

I'm using ubuntu and my computer does not have any serial/pararel port but I need to develop on it.

You need to simulate this ports in this case.

My answer:

serial port identification with java on ubuntu

Upvotes: 0

Ortwin Angermeier
Ortwin Angermeier

Reputation: 6183

Take a look at RXTX. Then you can use something like that:

 CommPortIdentifier portIdentifier = CommPortIdentifier.getPortIdentifier("/dev/tty1");
 CommPort commPort = portIdentifier.open("owner-name", 2000);
 SerialPort serialport;
 if (commPort instanceof SerialPort) {
   serialPort = (SerialPort)commPort;
   serialPort.setSerialPortParams(rate, databits, stopbits, parity);
 }
 InputStream in = serialPort.getInputStream();
 OutputStream out = serialPort.getOutputStream();

Upvotes: 2

heikkim
heikkim

Reputation: 2975

Please see: http://www.intellog.com/blog/?p=255 and http://www.coderanch.com/t/535173/Streams/java/CommPortIdentifier-getPortIdentifiers-empty (the latter points to the first)

Oracle does not offer the binaries for windows (assuming that you're on windows): http://www.oracle.com/technetwork/java/index-jsp-141752.html

Upvotes: 0

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