possibly you want concentrate on a processing code and make a good show,
so you not too fit / or even interested into
- arduino code and
- tricky serial communication
i can suggest to use
GitHub - firmata/arduino: Firmata firmware for Arduino ,
means you just upload a ready sketch to arduino,
and on processing side start with a example from lib
Arduino Playground - HomePage
install lib: Arduino Firmata v9 ( and close open IDE )
Files / Examples / Contributed Libraries /
Arduino ( Firmata ) / arduino input /
as a start i cut it down
/*arduino_input*/
import processing.serial.*;
import cc.arduino.*;
Arduino arduino;
void setup() {
size(470, 280);
println(Arduino.list());
// Modify this line, by changing the "0" to the index of the serial
// port corresponding to your Arduino board (as it appears in the list
// printed by the line above).
arduino = new Arduino(this, Arduino.list()[0], 57600);
}
void draw() {
println(arduino.analogRead(0)); //Ain 0
}
so you get integer numbers 0 … 1023 ( range of arduino Ain )
and in processing can do with it what you want.
example:
arduino example select:
arduino upload:
new processing code with select 3
/*arduino_input*/
import processing.serial.*;
import cc.arduino.*;
Arduino arduino;
String arduinoport = Arduino.list()[1];
int sel, vAin0;
void setup() {
size(1024, 280);
println(Arduino.list());
// Modify this line, by changing the "0" to the index of the serial
// port corresponding to your Arduino board (as it appears in the list printed by the line above).
println("try connect to "+arduinoport);
arduino = new Arduino(this, arduinoport, 57600);
}
void draw() {
background(200, 200, 0);
arduino_read();
select_of_three();
}
void select_of_three() {
int lim12 = 340, lim23 = 680;
if ( vAin0 >= 0 && vAin0 < lim12 ) sel = 0;
if ( vAin0 >= lim12 && vAin0 < lim23 ) sel = 1;
if ( vAin0 >= lim23 && vAin0 < 1024 ) sel = 2;
fill (0,200,0);
stroke(0,0,200);
rect (sel * lim12, 10, lim12, height-40);
}
void arduino_read() {
vAin0 = arduino.analogRead(0); //Ain 0
stroke(200, 0, 0);
line( vAin0, height-10, vAin0, height-20);
if ( keyPressed ) println("read vAin0: "+vAin0);
}