how to store serial data sent by arduino as buffer and print in processing?

Question

I have written a code in arduino which sends string of data Arduino code lines:

 int analog_value = analogRead(A0);//reading forward voltage
  int analog_valuer = analogRead(A1);//reading reverse voltage
 fwd_voltage = (analog_value * 5.0) / 1024.0; 
  rev_voltage = (analog_valuer * 5.0) / 1024.0;
 fpower =  ((fwd_voltage)*(fwd_voltage)*10000);
rpower = ((rev_voltage)*(rev_voltage)*10000);
String fp = String(fpower);
String rp =String(rpower);

 Serial.println("REV");
 Serial.println(rp);
Serial.println("W \n");
Serial.println("FWD");

 Serial.println(fp);
 Serial.println("W");

I want to print the data in processing console like this

REV [some value] W

FWD [some value] W

This is my processing code

void serialEvent(Serial myPort) {
while(port.available()>0){
val = port.readString();
 }
if (val!=null)
{
 println(val);

 }

 }

George Profenza · Accepted Answer · 2018-05-09 11:55:31Z

2

You can start with the Processing Serial library and the serialEvent() example. This shows you how to buffer a string of characters until the LineFeed(\n) character is received.

From there you should able to parse (trim, split, etc.) the string received over serial and extract the rp/fp values as needed.

answered May 9, 2018 at 11:55

George Profenza

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3 Comments

Aparna B Over a year ago

:I'll try. and do i need to change the way i write serial.println function in arduino for my desired output shown in question?

George Profenza Over a year ago

It totally depends on what you need out of that output. Currently, yes it looks like you do need to change the calls in Arduino if you want REV [some value] W to be output for example to something like: Serial.print("REV"); Serial.print(rp); Serial.println("W \n"); (e.g. output a new line only when you need it). Give it a go, it might not be as complex as you think :)

Aparna B Over a year ago

OK thanks. also I've seen the examples you suggested. I'll just try .

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