Read analog data directly in Processing


Step 3: Test the code and calibrate sensor range

Picture of Test the code and calibrate sensor range
1.Use the following code in processing:

import processing.serial.*;
import cc.arduino.*;

Arduino arduino; //creates arduino object

color back = color(64, 218, 255); //variables for the 2 colors

int sensor= 0;
int read;

float value;

void setup() {
  size(800, 600);
  arduino = new Arduino(this, Arduino.list()[0], 57600); //sets up arduino
    arduino.pinMode(sensor, Arduino.INPUT);//setup pins to be input (A0 =0?)

void draw() {
  println (read);
  value=map(read, 0, 680, 0, width); //use to callibrate  
  ellipse(value, 300,30, 30);


2. Use the “println” command to output your sensor’s minimum and maximum values. They will be different depending on the context. Plug the min and max values in your map() function.
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