[SOLVED] Processing with Arduino [How to Save Serial output every 'x' hour?]

Processing Electronics (Arduino, etc.)
4

Solution Code

// (saves data and writes to 'output' instance every minute

import processing.serial.*;    // import the Processing serial library
PrintWriter output;  

Serial myPort; 

// String [] months = {"Jan", "Feb", "Mar", "Apr", "May", "June", "July", "Aug", "Sept", "Oct", "Nov", "Dec"} ;   

long time=0;    // initialize variable for the current time since program started
String value;// initialize variable for serial data from Arduino

int y = 0;
int mon = 0;
int d = 0;
int h = 0;
int m = 0;
int s = 0;
String am_pm;

String title = "subject_1.txt";

int prev_min = minute();

// * * * * * * * * * * * * * * * * S E T U P * * * * * * * * * * * * * *

void setup() {
  size(200,200);
  
  String portName = Serial.list()[3];  // change every time different port is used
  // look it from Arduino Side (simple indexing from 0) 
  
  myPort = new Serial(this, portName, 9600);
  myPort.bufferUntil('\n');  // would I need this statement?
  
  // "/" makes the directory: in this example, creates a directory named "2019" 
  // output format: mmddyy_hhmm(am/pm)_mouse_#.txt  (Ex: 020419_1234pm_mouse_1.txt)
  // first instance of output: 
  
  output = createWriter(year() + "/" + String.format("%02d", month()) + String.format("%02d", day()) + String.format("%04d", year()) + "_" + 
  String.format("%02d", hour()) + String.format("%02d", minute()) + (hour() > 11? "pm ":"am ") + title);
   
}

// * * * * * * * * * * * * * * * * L O O P * * * * * * * * * * * * * *

void draw()
{
 record();
}

// * * * * * * * * * * * * * * * * F U N C T I O N * * * * * * * * * * * * * *

void record() {

  if (myPort.available() > 0) {  // If data is available,
    value = myPort.readStringUntil('\n'); // read until new line carriage 
  

    if (value != null) {
    
    // prints to console
      println(value);

      // creates output instance every minute: 
      if (prev_min != minute()) {
     
        output.close(); // close the first instance --loops around--> close the next instances 
        
        output = createWriter(year() + "/" + String.format("%02d",month()) + String.format("%02d",day()) + String.format("%04d",year()) + "_" + 
                  String.format("%02d", hour()) + String.format("%02d", minute()) + (hour() > 11? "pm ":"am ") + title);
        
        prev_min = minute();       

      }
      output.print(value); 
      output.flush(); 
    
  } // end of (value != null)
 } // end of (myPort.available() > 0)
} // end of function
  
// just to exit out of the program: 
void keyPressed(){
  
  output.flush();
  output.close();
  println("End Line");
  exit();
  }

Hope this helps anybody who’s having trouble with this particular problem

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