Read serial data java in one line

Question

I'm making a project with a rs485 module.
Every time the module sends data to my com port i want to catch that data.
And that's works, I can catch it. But when I catch it I see it in multiple lines.

My data starts every time with * and ends with # .

Can you help my to catch the data in only 1 line ? Thanks !

public void serialEvent(SerialPortEvent event) {
    //if(event.isRXCHAR() && event.getEventValue() > 0) {
    try {

        String receivedData = serialPort.readString(event.getEventValue());
        while (receivedData.charAt(0) == '#') {
            receivedData = receivedData.substring(1, receivedData.length());
        }
        System.out.println("Received response from port: " + receivedData);
    } catch (SerialPortException ex) {
        System.out.println("Error in receiving response from port: " + ex);
    }
    //}
}

Answer 1

You need to read until you get the initial * , and then read until you get the final # ":

String ch;
StringBuffer data = new StringBuffer();
while (!(ch = serialPort.readString(1)).equals("*"))
    ;
while (!(ch = serialPort.readString(1)).equals("#"))
    data.append(ch);
return data.toString();

You need to add error and EOS handling to this, of course.

Answer 2

If the problem is that you are iterating receivedData as a char array then you can do this

receivedData = receivedData.substring(receivedData.indexOf('*'), receivedData.indexOf('#'));

If you are getting new line characters in the input just use

receivedData = receivedData.replaceAll("(\\n)", "");

Answer 3

Take a look at this. Since you are not running the String receivedData = serialPort.readString(event.getEventValue()); in a loop, you have to be getting a string. So I am assuming that the string you are getting has \\n after every character.
Is that assumption correct? Or is it something else?