Snowflake power meter This code takes in pulses from an arduino over serial and draws a snowflake on the screen for each pulse. It also passes the values into a MySQL database, if you give it the right information. it needs the bezier sql library and the mysql library to work.

snowflake energy meter.pde

//Based on an example by Tom Igoe
PrintWriter output;
import processing.serial.*;
import de.bezier.data.sql.*;
//import SQLibrary.*;    // mysql database library
int xrnd = 0;
int yrnd = 0;
PFont fontA;
int xbig = 1000;
int ybig = 768;
int flakesize = 200;

Serial myPort;  // The serial port:
String buff = "";
int NEWLINE = 10;
MySQL msql;

void setup() {
  // List all the available serial ports:
  println(Serial.list());

  // I know that the first port in the serial list on my mac
  // is always my  Keyspan adaptor, so I open Serial.list()[0].
  // Open whatever port is the one you're using.
  String portName = Serial.list()[1];
  myPort = new Serial(this, portName, 9600);
  output = createWriter("datalog.txt");
  size(xbig,ybig);
  background(0);
  fontA = loadFont("CourierNew36.vlw");
  textAlign(CENTER);
  textFont(fontA, 20);

  
  String user     = "insert username";
  String pass     = "insert password";
  String database = "hackdb";
  msql = new MySQL( this, "insert yourserver here", database, user, pass );

}


void draw()
{
  while (myPort.available() > 0)
    serialEvent(myPort.read());
}

void snowflakedraw()
{
  
  //randomly refresh the screen
  if (random(0,200) > 170){
//  saveFrame("snowflakespaperx##.png");
  background(0,10);
  }
//stroke(0, random(50,255));
//translate(width/2, height/2);
translate(random(0+flakesize/2,width-flakesize/2), random(0+flakesize/2,height-flakesize/2));
rotate(radians(random(0,360)));
//float itervar = random(0, 2*width);
  for (int sweep = 1; sweep <random(5,50); sweep++){
    float spikelength = random(0, flakesize*.7);
    float offset = random(0, flakesize*.7);

//draw the spines
      stroke(255,10);
      for (int i = 0; i<6; i++){
        rotate(radians(-60));
        line(0,0,0,flakesize/2);
      }
      
//draw the flake bits
      stroke(250,random(0,255));
      for (int i = 0; i<6; i++){
        rotate(radians(-60));
        line(0,spikelength/(sweep/2),spikelength/(sweep/2),offset/12);
        line(0,spikelength/(sweep/2),-spikelength/(sweep/2),offset/12);
//        delay(50);
        }
  }
}




void serialEvent(int serial)
{
  if (serial != NEWLINE) {
    // Store all the characters on the line.
    buff += char(serial);
  } else {
    // The end of each line is marked by two characters, a carriage
    // return and a newline.  We're here because we've gotten a newline,
    // but we still need to strip off the carriage return.
    if (buff.length()>1) {
    buff = buff.substring(0, buff.length()-1);

    // Parse the String into an integer.  We divide by 4 because
    // analog inputs go from 0 to 1023 while colors in Processing
    // only go from 0 to 255.
//    int val = Integer.parseInt(buff)/4;

    // Clear the value of "buff"
    println(buff);
    snowflakedraw();
    //xrnd = int(random(0,xbig));
    //yrnd = int(random(0,ybig));
    
    
    
//     fill(random(180,255),random(0,255),random(0,255), 100);
//     ellipse(xrnd, yrnd, 80, 80);
//     font = loadFont("FFScala-32.vlw"); 
//     textFont(font); 
//     fill(random(0,50));
//     text("1kWh",xrnd-40,yrnd-5, 80, 50); 
    output.println(buff);
           if ( msql.connect() )
    {
        msql.execute(buff);//"INSERT INTO yoursqltable VALUES (55, 2, 3)");
//        msql.next();
//        (<MsgNum>,<MeterNum>,<MeterAcc>) 
//        println( "number of rows: " + msql.getInt(1) );
    }
  else
    {
        // connection failed !
    }
    buff = "";

    // Shift over the existing values to make room for the new one.
//    for (int i = 0; i < 63; i++)
//      values[i] = values[i + 1];

    // Add the received value to the array.
//    values[63] = val*8;
    }
  }
}

void keyPressed() { // Press a key to save the data
  output.flush(); // Write the remaining data
  output.close(); // Finish the file
  exit(); // Stop the program
}