Serial out to .txt

kevinks

Hi, I have got this code which reads serial out from an arduino and save it to a text file. Unfortunately, the file data.txt happens to have some garbage values in addition to the serial output data. I can't find what's wrong with the code. If i remove the processing and take the output on arduino ide's serial monitor i get the correct data. I would really like a helping hand here. And oh., the output is from an rfid reader connected to arduino. Here's the code

import processing.serial.*; PrintWriter output;

Serial myPort; void setup() { output= createWriter("data.txt"); myPort=new Serial(this,"COM1",9600); } void draw() { while(myPort.available()>0) { String rfid=myPort.readString(); if(rfid!=null) { output.println(rfid); } } } void keyPressed() { output.flush(); output.close(); exit(); }

kevinks

I am so sorry about the formatting.. Will post the code again

kevinks

import processing.serial.*;

PrintWriter output;

Serial myPort;

void setup()

{ output= createWriter("data.txt"); myPort=new Serial(this,"COM1",9600);

}

void draw()

{

while(myPort.available()>0)

 {

   String rfid=myPort.readString();

     if(rfid!=null)

         {

           output.println(rfid);

         }

 }

}

void keyPressed()

{

output.flush();

output.close();

exit();

}

GoToLoop

http://forum.processing.org/two/discussion/8045/how-to-format-code-and-text
https://processing.org/reference/trim_.html

kevinks

GoToloop thanks for the help mate.. With the formatting.. Will let you know the details about the code soon.. :)

kevinks

It works.. trim().. Solved the space and break line issue but couldn't solve garbages appearing

kevinks

I don't see that additional character when i use the println() alone. Can see the rfid as such in the processing output.. But when i use it to write to a text file a square with an 'x' inside it appears at the end along with the rfid's serial number.

GoToLoop

Why don't you code something like a superTrim()?
More specifically an alphaNumFilter() or a more specific filter set function?

• https://docs.oracle.com/javase/8/docs/api/java/lang/Character.html
• https://docs.oracle.com/javase/8/docs/api/java/lang/StringBuilder.html

static final String alphaNumFilter(CharSequence s) {
  StringBuilder sb = new StringBuilder(s);

  for (int i = sb.length(); i-- != 0; )
    if (!Character.isLetterOrDigit(sb.charAt(i)))  sb.deleteCharAt(i);

  return sb.toString();
}

PhiLho

"Will post the code again"
Simpler, cleaner and less noisy to edit your first message...
Beside, apparently you haven't fully understood how to format code properly... If the article was unclear, I appreciate remarks on it, so I can improve it.

GoToLoop

I've got a remark: the CTRL+O or CTRL+K thing should be the very 1st thing mentioned! :P

kevinks

Phil, thanks mate.. I am really sorry about the formatting part.. Browsing on mobile and i am new to this.. Posted the code from a notepad file in my phone.. (it's not that high end device either :-( ) anyway. If you could help me with the issue, i would be very much delighted.. :-)

PhiLho

Well, you haven't tell us if GoToLoop's solution works or not.
Beside, I don't understand the "a square with an 'x' inside it appears at the end" part. Where does it appear?

kevinks

GoToloop's solution worked.. Previously the rfid's serial number displayed in different lines.. With breaks in between.. Like 1400 in one line B4 in next and the rest in the next line.. Using trim function reduced it all in a single line.. But at the end there is that particular character.. It looks similar to this [x]..