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PORandom new line when reading rs232
 

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  1. PORandom new line when reading rs232
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    <p>I'm working on a java program that writes commands and reads output of a thermometer through rs232. I'm using <a href="https://code.google.com/p/java-simple-serial-connector/" rel="nofollow">JSSC</a>. The writing part works fine, but when I'm reading the output and convert it to String and print it with System.out.println(), some random new lines appear. When I write the result with System.out.write(), everything is working fine. I checked the bytecode, and I didn't found any NL character.</p> <p>Heres my code:</p> <pre><code>public boolean openPort(int rate, int databits, int stopbit, int parity){ try { serialPort.openPort(); serialPort.setParams(rate, databits, stopbit, parity); int mask = SerialPort.MASK_RXCHAR + SerialPort.MASK_CTS + SerialPort.MASK_DSR;//Prepare mask serialPort.setEventsMask(mask);//Set mask serialPort.addEventListener(new SerialPortReader());//Add SerialPortEventListener return true; } catch (SerialPortException e) { System.out.println(e); return false; } } static class SerialPortReader implements SerialPortEventListener { public void serialEvent(SerialPortEvent event) { if(event.isRXCHAR()){//If data is available try { byte buffer[] = serialPort.readBytes(event.getEventValue()); //with system.out.write try { System.out.write(buffer); } catch (IOException e) { // TODO Auto-generated catch block e.printStackTrace(); } //with system.out.println String readed = new String(buffer); System.out.println(readed); } catch (SerialPortException ex) { System.out.println(ex); } } else if(event.isCTS()){//If CTS line has changed state if(event.getEventValue() == 1){//If line is ON System.out.println("CTS - ON"); } else { System.out.println("CTS - OFF"); } } else if(event.isDSR()){///If DSR line has changed state if(event.getEventValue() == 1){//If line is ON System.out.println("DSR - ON"); } else { System.out.println("DSR - OFF"); } } } } </code></pre> <p>Here's the outpout with println():</p> <pre><code>--- START (C) --- 21.0, 21.1,21.3, 21.1 21.0, 21.2,21.3, 21.2 </code></pre> <p>And the desired output with write()</p> <pre><code>--- START (C) --- 21.0,21.1,21.3,21.1 21.0,21.1,21.3,21.1 </code></pre> <p>You'll say "why don't you just use write()?", but I need to convert this output to a string.</p> <p>Can someone help me?</p>
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    1. COIs the thermometer in your desired output sending the newlines after 4 values? You say its desired output, but you're wondering in a comment to Hot Licks answer that you're not expecting a newline, I'm confused.
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    2. COYeah,I might have explained it badly... I want to have a new line after 4 values. But when I'm using println(), there's new lines everywhere
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