hdurdle/etherled.ino

## etherled.ino
#include <SPI.h>
#include <Ethernet.h>

int bluPin = 6;
int grnPin = 5;
int redPin = 3;

int redVal = 0;
int bluVal = 0;
int grnVal = 0;
int prevR = redVal;
int prevG = bluVal;
int prevB = grnVal;

int off[3]    = { 0, 0, 0 };
int red[3]    = { 255, 0, 0 };
int green[3]  = { 0, 255, 0 };
int blue[3]   = { 0, 0, 255 };
int white[3]   = { 255, 255, 255 };

int wait = 1;
int hold = 0;

unsigned long timeLastCommand;

byte mac[] = { 0xFA, 0xDE, 0xFA, 0xDE, 0xFA, 0xDE };

EthernetServer server(80);
String readString;

void setup() {
  Serial.begin(9600);
  Serial.println("OMGRGBFTW");

  Ethernet.begin(mac);
  server.begin();

  pinMode(redPin, OUTPUT);
  pinMode(grnPin, OUTPUT);
  pinMode(bluPin, OUTPUT);

  cycle(3, true);
  delay(100);
  cycle(2, false);
}

void cycle(int count, boolean rgb) {
  for (int i = 0; i < count; i++) {
    if (rgb) {
      setColor(red);
      delay(100);
      setColor(green);
      delay(100);
      setColor(blue);
      delay(100);
      setColor(off);
    } else {
      setColor(white);
      delay(100);
      setColor(off);
    }
  }
}

void loop() {

  EthernetClient client = server.available();
  if (client) {
    while (client.connected()) {
      if (client.available()) {
        char c = client.read();

        if (readString.length() < 100) {
          readString += c;
        }

        //if HTTP request has ended
        if (c == '\n') {

          client.println("HTTP/1.1 200 OK"); // send new page
          client.println("Content-Type: text/html");
          client.println();

          client.println("<html><head><title>OMGRGBFTW</title></head>");
          client.println("<body>");
          client.println("<h1>OMGRGBFTW</h1>");
          client.println("<hr />");
          client.println("<br />");

          client.println("<a href=\"/?red\"\">Pulse Red</a>");
          client.println("<br />");
          client.println("<a href=\"/?green\"\">Pulse Green</a>");
          client.println("<br />");
          client.println("<a href=\"/?blue\"\">Pulse Blue</a>");
          client.println("<br />");

          client.println("<a href=\"/?off\"\">Off</a><br />");
          client.println("<a href=\"/?fadeOff\"\">Fade Off</a><br />");
          client.println("</body></html>");

          delay(1);
          client.stop();

          if(readString.indexOf("?setHex=") >0) {
            int loc = readString.indexOf("?setHex=")+8;
            String hexstring = readString.substring(loc, loc+6);

            long number = (long) strtol( &hexstring[0], NULL, 16);

            int rHex = number >> 16;
            int gHex = number >> 8 & 0xFF;
            int bHex = number & 0xFF;

            int colorToSet[3] = { rHex, gHex, bHex };
            setColor(colorToSet);
            prevR = rHex;  prevG = gHex;  prevB = bHex;
            redVal = rHex; grnVal = gHex; bluVal = bHex;
          }

          if(readString.indexOf("?fadeHex=") >0) {
            int loc = readString.indexOf("?fadeHex=")+9;
            String hexstring = readString.substring(loc, loc+6);

            long number = (long) strtol( &hexstring[0], NULL, 16);

            int rHex = number >> 16;
            int gHex = number >> 8 & 0xFF;
            int bHex = number & 0xFF;

            int colorToSet[3] = { rHex, gHex, bHex };
            crossFade(colorToSet);
          }

          if(readString.indexOf("?pulseHex=") >0) {
            int loc = readString.indexOf("?pulseHex=")+10;
            String hexstring = readString.substring(loc, loc+6);

            long number = (long) strtol( &hexstring[0], NULL, 16);

            int rHex = number >> 16;
            int gHex = number >> 8 & 0xFF;
            int bHex = number & 0xFF;

            int colorToSet[3] = { rHex, gHex, bHex };
            pulseColor(colorToSet);
          }

          if(readString.indexOf("?red") >0) {
            pulseColor(red);
          }
          if(readString.indexOf("?green") >0) {
            pulseColor(green);
          }
          if(readString.indexOf("?blue") >0) {
            pulseColor(blue);
          }
          if(readString.indexOf("?fadeOff") >0) {
            crossFade(off);
          }
          if(readString.indexOf("?off") >0) {
            setColor(off);
            prevR = 0;  prevG = 0;  prevB = 0;
            redVal = 0; grnVal = 0; bluVal = 0;
          }

          // clearing string for next read
          readString = "";

        }
      }
    }
  }
}

void setColor(int color[3]) {

    analogWrite(redPin, color[0]);
    analogWrite(grnPin, color[1]);
    analogWrite(bluPin, color[2]);

    prevR = color[0];
    prevG = color[1];
    prevB = color[2];
}

void pulseColor(int color[3]) {

    crossFade(color);
    crossFade(off);
    crossFade(color);
    crossFade(off);
    crossFade(color);
}

int calculateStep(int prevValue, int endValue) {

    int step = endValue - prevValue;
    if (step) {
        step = 1020 / step;
    }
    return step;
}

int calculateVal(int step, int val, int i) {

    if ((step) && i % step == 0) {
        if (step > 0) {
            val += 1;
        } else if (step < 0) {
            val -= 1;
        }
    }
    if (val > 255) {
        val = 255;
    } else if (val < 0) {
        val = 0;
    }
    return val;
}

void crossFade(int color[3]) {

  int R = (color[0]);
  int G = (color[1]);
  int B = (color[2]);

  int stepR = calculateStep(prevR, R);
  int stepG = calculateStep(prevG, G);
  int stepB = calculateStep(prevB, B);

  for (int i = 0; i <= 1020; i++) {
    redVal = calculateVal(stepR, redVal, i);
    grnVal = calculateVal(stepG, grnVal, i);
    bluVal = calculateVal(stepB, bluVal, i);

    analogWrite(redPin, redVal);
    analogWrite(grnPin, grnVal);
    analogWrite(bluPin, bluVal);

    delay(wait);

  }

  prevR = redVal;
  prevG = grnVal;
  prevB = bluVal;
  delay(hold);
}
	#include <SPI.h>
	#include <Ethernet.h>

	int bluPin = 6;
	int grnPin = 5;
	int redPin = 3;

	int redVal = 0;
	int bluVal = 0;
	int grnVal = 0;
	int prevR = redVal;
	int prevG = bluVal;
	int prevB = grnVal;

	int off[3] = { 0, 0, 0 };
	int red[3] = { 255, 0, 0 };
	int green[3] = { 0, 255, 0 };
	int blue[3] = { 0, 0, 255 };
	int white[3] = { 255, 255, 255 };

	int wait = 1;
	int hold = 0;

	unsigned long timeLastCommand;

	byte mac[] = { 0xFA, 0xDE, 0xFA, 0xDE, 0xFA, 0xDE };

	EthernetServer server(80);
	String readString;

	void setup() {
	Serial.begin(9600);
	Serial.println("OMGRGBFTW");

	Ethernet.begin(mac);
	server.begin();

	pinMode(redPin, OUTPUT);
	pinMode(grnPin, OUTPUT);
	pinMode(bluPin, OUTPUT);

	cycle(3, true);
	delay(100);
	cycle(2, false);
	}

	void cycle(int count, boolean rgb) {
	for (int i = 0; i < count; i++) {
	if (rgb) {
	setColor(red);
	delay(100);
	setColor(green);
	delay(100);
	setColor(blue);
	delay(100);
	setColor(off);
	} else {
	setColor(white);
	delay(100);
	setColor(off);
	}
	}
	}

	void loop() {

	EthernetClient client = server.available();
	if (client) {
	while (client.connected()) {
	if (client.available()) {
	char c = client.read();

	if (readString.length() < 100) {
	readString += c;
	}

	//if HTTP request has ended
	if (c == '\n') {

	client.println("HTTP/1.1 200 OK"); // send new page
	client.println("Content-Type: text/html");
	client.println();

	client.println("<html><head><title>OMGRGBFTW</title></head>");
	client.println("<body>");
	client.println("<h1>OMGRGBFTW</h1>");
	client.println("<hr />");
	client.println("<br />");

	client.println("<a href=\"/?red\"\">Pulse Red</a>");
	client.println("<br />");
	client.println("<a href=\"/?green\"\">Pulse Green</a>");
	client.println("<br />");
	client.println("<a href=\"/?blue\"\">Pulse Blue</a>");
	client.println("<br />");

	client.println("<a href=\"/?off\"\">Off</a><br />");
	client.println("<a href=\"/?fadeOff\"\">Fade Off</a><br />");
	client.println("</body></html>");

	delay(1);
	client.stop();

	if(readString.indexOf("?setHex=") >0) {
	int loc = readString.indexOf("?setHex=")+8;
	String hexstring = readString.substring(loc, loc+6);

	long number = (long) strtol( &hexstring[0], NULL, 16);

	int rHex = number >> 16;
	int gHex = number >> 8 & 0xFF;
	int bHex = number & 0xFF;

	int colorToSet[3] = { rHex, gHex, bHex };
	setColor(colorToSet);
	prevR = rHex; prevG = gHex; prevB = bHex;
	redVal = rHex; grnVal = gHex; bluVal = bHex;
	}

	if(readString.indexOf("?fadeHex=") >0) {
	int loc = readString.indexOf("?fadeHex=")+9;
	String hexstring = readString.substring(loc, loc+6);

	long number = (long) strtol( &hexstring[0], NULL, 16);

	int rHex = number >> 16;
	int gHex = number >> 8 & 0xFF;
	int bHex = number & 0xFF;

	int colorToSet[3] = { rHex, gHex, bHex };
	crossFade(colorToSet);
	}

	if(readString.indexOf("?pulseHex=") >0) {
	int loc = readString.indexOf("?pulseHex=")+10;
	String hexstring = readString.substring(loc, loc+6);

	long number = (long) strtol( &hexstring[0], NULL, 16);

	int rHex = number >> 16;
	int gHex = number >> 8 & 0xFF;
	int bHex = number & 0xFF;

	int colorToSet[3] = { rHex, gHex, bHex };
	pulseColor(colorToSet);
	}

	if(readString.indexOf("?red") >0) {
	pulseColor(red);
	}
	if(readString.indexOf("?green") >0) {
	pulseColor(green);
	}
	if(readString.indexOf("?blue") >0) {
	pulseColor(blue);
	}
	if(readString.indexOf("?fadeOff") >0) {
	crossFade(off);
	}
	if(readString.indexOf("?off") >0) {
	setColor(off);
	prevR = 0; prevG = 0; prevB = 0;
	redVal = 0; grnVal = 0; bluVal = 0;
	}

	// clearing string for next read
	readString = "";

	}
	}
	}
	}
	}

	void setColor(int color[3]) {

	analogWrite(redPin, color[0]);
	analogWrite(grnPin, color[1]);
	analogWrite(bluPin, color[2]);

	prevR = color[0];
	prevG = color[1];
	prevB = color[2];
	}

	void pulseColor(int color[3]) {

	crossFade(color);
	crossFade(off);
	crossFade(color);
	crossFade(off);
	crossFade(color);
	}

	int calculateStep(int prevValue, int endValue) {

	int step = endValue - prevValue;
	if (step) {
	step = 1020 / step;
	}
	return step;
	}

	int calculateVal(int step, int val, int i) {

	if ((step) && i % step == 0) {
	if (step > 0) {
	val += 1;
	} else if (step < 0) {
	val -= 1;
	}
	}
	if (val > 255) {
	val = 255;
	} else if (val < 0) {
	val = 0;
	}
	return val;
	}

	void crossFade(int color[3]) {

	int R = (color[0]);
	int G = (color[1]);
	int B = (color[2]);

	int stepR = calculateStep(prevR, R);
	int stepG = calculateStep(prevG, G);
	int stepB = calculateStep(prevB, B);

	for (int i = 0; i <= 1020; i++) {
	redVal = calculateVal(stepR, redVal, i);
	grnVal = calculateVal(stepG, grnVal, i);
	bluVal = calculateVal(stepB, bluVal, i);

	analogWrite(redPin, redVal);
	analogWrite(grnPin, grnVal);
	analogWrite(bluPin, bluVal);

	delay(wait);

	}

	prevR = redVal;
	prevG = grnVal;
	prevB = bluVal;
	delay(hold);
	}