MultiSensor Send, File and Show

Here is Arduino code for listening to a couple of sensors in formatting them and sending them to Processing. Then there is Processing code for listening for the serial data and writing to a file. It also parses the data and graphs it.

Arduino Side:

int breath ;
int light ;
int heat;
int sweat;
int posture;
int electricity;

void setup() {
Serial.begin(9600);
//  Serial.println("Start");
}

void loop() {

electricity = analogRead(0);
Serial.print(electricity);
Serial.print(",");

sweat = analogRead(1);
Serial.print(sweat);
Serial.print(",");

heat = analogRead(2);
Serial.print(heat);
Serial.print(",");

light = analogRead(3);
Serial.print(light);
Serial.print(",");

posture = analogRead(4);
Serial.print(posture);
Serial.print(",");

breath = analogRead(5);
Serial.print(breath);
Serial.print(",");

Serial.write(10);

}

Processing Side:

import java.io.FileNotFoundException;
import java.io.FileOutputStream;

import processing.core.PApplet;
import processing.serial.Serial;

public class SerialFiler extends PApplet {
  Serial port; // The serial port
  int xpos;
  int expectedNumberOfSensors = 6;
  int nowShowing =0;

  FileOutputStream file;

  int screenPos;
  int lastx;
  int lasty;
  int mid;

  public void setup() {
    size(screen.width*3/4, 600); // Stage size
    mid = height/2;
    stroke(255);
    // Print a list of the serial ports, for debugging purposes to find out what your ports are called:
    println(Serial.list());
    //
    port = new Serial(this, Serial.list()[0], 9600); //you can pull the name out of the list
    port.clear();
    //  port = new Serial(this, "/dev/tty.usbserial-A300119a", 9600); // or you can just specify it
    //port.write(65); // Send a capital A in case the microcontroller is waiting to hear from you

    try {
      file = new FileOutputStream("logi.txt", true);//true means append to the file
    }
    catch (FileNotFoundException donnaKaran) {
      donnaKaran.printStackTrace();
    }

    background(0);
  }

  public void draw() {

  }

  public void serialEvent(Serial port) {
    String input = port.readStringUntil(10); // make sure you return (Ascii 13) at the end of your transmission
    if (input != null) {
      println("raw Input: " + input);

      long now = System.currentTimeMillis();
      String thisReading = now + "," + input;  //prepend a timestamp to the reading
      try {
        file.write(thisReading.getBytes("UTF8")); // send the input to a file
      }
      catch (Exception e) {
        println("Error: Can’t write file!" );
      }

      //okay lets draw it too.
      String[] allInput = input.split(",");
      String thisInput = allInput[nowShowing];
      thisInput = thisInput.trim(); //precaution in case there is an extra 10 character attached

      int inputAsInt = Integer.parseInt( thisInput); //turn the string back into a number

      if (screenPos == width) {  //did you get to the end of screen?
        screenPos = 0;
        background(0);
        lastx = 0;
        lasty =0;
      }
      int y = inputAsInt/2; //mid - inputAsInt/2;
      stroke(255);

      line(lastx,lasty,screenPos,y);
      lastx = screenPos;
      lasty =y;
      screenPos++;
    }
  }

  public void keyPressed(){
    //pick a sensor
    if (key == '-') {
      nowShowing = max(0,nowShowing -1);
    }
    else if (key == '='){
      nowShowing = min(expectedNumberOfSensors-1,nowShowing +1);
    }
    println("Now Showing " + nowShowing);
  }

}