unable to find serial port in java using jserialcomm

Question

I want to create communication between serial port and java, since my real device is not arrived yet, so I use socat as people suggested on internet mostly.

I start with running socat first for virtual serial port with this command

socat -d -d pty,raw,echo=0 pty,raw,echo=0

then I get this

2018/12/05 05:05:04 socat[2687] N PTY is /dev/pts/4
2018/12/05 05:05:04 socat[2687] N PTY is /dev/pts/5

that's mean I could use /dev/pts/4 and /dev/pts/5 for port (NB: this is randomly given by socat, i don't know why)

and then I tried with python for communication with /dev/pts/4, and its work perfectly, then I use java with jSerialComm library I couldn't connect to /dev/pts/4, even cannot listed any ports.

SerialPort sp=SerialPort.getCommPort("/dev/pts/4");
System.out.println(sp.isOpen());

my java code keeps returning false. any response for this I'd appreciate it.

thanks

Answer 1

When you do SerialPort sp=SerialPort.getCommPort("/dev/pts/4"); you are getting the object that controls that port. The port however is still closed until you open it. This is done by doing sp.openPort(); . Then you will see that when you run sp.isOpen(); it should return true.

If you need further help the documentation can be found here .