Using two different readStringUntil "characters"

[eezJerome]

@GoToLoop

Dunno much about Arduino, but it seems correct to me.
Although you can simplify it a lil’ more like this:

Serial.print(x1);
Serial.write('\t');
Serial.println(y1);

Thanks!

@GoToLoop

Where’s Serial:: bufferUntil() after this statement:
port = new Serial(this, "COM12", 115200);

Oops I, too, knew I was missing something

I’ll take the time to slowly read because often times I skim (idk it’s a natural thing I do). Proves to be ineffective with programming hehe

@GoToLoop

I’m also noticing you’re sending 2 int values, not float 1s:

int x1 = map(x, 1023, 0, -10, 10);
int y1 = map(y, 0, 1023, -10, 10);

So it’ll be more efficient to replace all float to int in the Processing side as well.

Will do but maybe I’ll just replace the Arduino code parts to float. If we’re going for code efficiency, I guess I’ll change it to int

At the time I wrote this reply this is what I have so far (implementing your recent suggestions…)

import processing.serial.*;

Serial port;
float[] coords = new float [2];

float x, y;
float px = 250;
float py = 250;

void setup(){
  size(500,500);
  final String[] str = Serial.list(); //not sure why i need this but copied it anyway
  printArray(str);                    //this one too
  port = new Serial (this, "COM12", 115200);
  port.bufferUntil('\n');
}

void draw(){
  background(1);
    //serialEvent(port);
    //coords = float(splitTokens(port.readString()));
    stroke(255);
    x = coords[0];
    y = coords[1];
    line(px, py, x + px, y + py);
    print(x);
    print(y);
    println(" ");
    px = x;
    py = y;
}

void serialEvent(final Serial port){
  coords = float(splitTokens(port.readString()));
  //redraw = true; //added just because it's on your model code
}

With a weird output

[code]
[0] “COM12”
0.00.0

…

0.00.0
0.00.0
ArrayIndexOutOfBoundsException: 0

[/code]:

TL:DR the end of the output has an error on it

It’s also not drawing anything