Capsense for Processing - Connecting Via Serial

gistfile1.txt

//Simple Soft Circuits/Capsense Connection via Spacebrew toolkit
//by Joselyn McDonald and Nicole Messier

//This is Part B of input - You should have already run the Arduino Serial and CapSense Sketch - Soft_Circuits_Capsense_Input_Arduino_Part_A -  

//You will need to download Spacebrew and put the spacebrew library in the libraries folder
import spacebrew.*; 

//import the Serial library so can read from arudino input via serial communication
import processing.serial.*; 
 
// the number 10 is ASCII for linefeed (end of serial.println), 
//later we will look for this to break up individual messages
int end = 10;    
String serial;   // declare a new string called 'serial' 
Serial port;  // The serial port, this is a new instance of the Serial class (an Object)
 
//These are general requirements of Spacebrew: Server, name, and description. 

//Change the name of this server to "";
String server="sandbox.spacebrew.cc";
//name your project 
String name="soft-circuits";
//Tell them what your code does. It will come up in the hover message. 
String description ="Client that sends and receives boolean messages. Background turns yellow when message received.";
 
//Spacebrew Object
Spacebrew sb;
 
//name your value as an integer
int  capSensor = 0;

 
void setup() {
  
 
 // instantiate the spacebrewConnection variable
  sb = new Spacebrew( this );

  // declare your publishers
  sb.addPublish( "Y_or_N", "boolean", true );
 
 //Connecet your sketch online! 
  sb.connect(server, name, description );
 
  
  //serial reading code
  // initializing the object by assigning a port and baud rate (must match that of Arduino)
  // you may(will!) need to change the number in [] to match which serial port your arduino is connected to
  //println(Serial.list()); uncomment this if you need to list your serial ports - remember it starts at 0 

  port = new Serial(this, Serial.list()[5], 9600); 
  
  // function from serial library that throws out the first reading, 
  // in case we started reading in the middle of a string from Arduino
  port.clear();  
  
  // function that reads the string from serial port 
  // until a println and then assigns string to our string variable (called 'serial')
  serial = port.readStringUntil(end); 
  
  // initially, the string will be null (empty)
  serial = null; 
  
}
 
void draw() {
  
  //if there is data coming from the serial port read it/ store it
  while (port.available() > 0) { 
    serial = port.readStringUntil(end);
  }
  
  //if the string is not empty, do this
  if (serial != null) {  
        //capsense Input form Arduino, each value is seperated and split depending on the ','
        //and then saved in seperate cells of the array so we can access each 
        String[] SensorInput = split(serial, ','); 
       //can help to print these to console at this point to check it's working
       println(SensorInput); 
           
  //your sensorInput is coming in as a string separated by "," commas, use this to convert the string to a 
 //number so you can use boolean operators to compare.  
 capSensor  = int(SensorInput[0]); 
    
  //the numbers coming in via serial are mapped to be low (0-3 range) if noone is touching the copper tape/capsensor, 
// and towards the higher end of the 0-10 scale (7-10 range) if someone is touching it. So youre comparing the incoming
//sensor measure against "5" to see if the sensor is being touched. 
  if(capSensor >= 3){ 
    sb.send("Y_or_N", true); 
     //^^if touched, send true
     //the processing sketch on the other side (connected via spacebrew) will do something (light up LED) when it receives true
     
   }     else {
    
   sb.send("Y_or_N", false); }
   //^^ if not touched, send false. 
  }
  
  
}