cheerlgihts.ino

float temp;
int tempPin = 0;
int ledAnalogOne[] = {3, 5, 6};

const byte RED[]  = {255,0,0}; //0
const byte GREEN[]  = {0,255,0}; //1
const byte BLUE[]  = {0,0,255}; //2
const byte CYAN[]  = {0,255,255}; //3
const byte WHITE[]  = {255,255,255}; //4
const byte WARMWHITE[]  = {253,245,230}; //5
const byte MAGENTA[]  = {255,0,255}; //6
const byte YELLOW[]  = {255,255,0}; //7
const byte ORANGE[]  = {255,165,0}; //8
const byte PINK[] = {255,192,203}; //9
const byte PURPLE[]  = {128,0,128}; //10
const byte OLDLACE[]  = {255,192,203}; //11
const byte BLACK[] = {0,0,0}; //12

void setup()
{
  for(int i = 0; i < 3; i++)
  {
    pinMode(ledAnalogOne[i], OUTPUT);
  }
  setColor(ledAnalogOne, BLACK);
  Serial.begin(9600);
}

void loop()
{
  if (Serial.available())
  {
    char ch = Serial.read();
    Serial.print("Received: ");
    int colourCode = ch - 0;    
    Serial.println(ch);
    switchColour(colourCode);
  }

}

void switchColour(int colour)
{
  const byte* output = 0;
  switch (colour)
  {
    case 48:
    output = RED;
    Serial.println("Setting to Red");
    break;
    case 49:a
    output = GREEN;
    Serial.println("Setting to Green");
    break;
    case 50:
    output = BLUE;
    Serial.println("Setting to Blue");
    break;
    case 51:
    output = CYAN;
    Serial.println("Setting to Cyan");
    break;
    case 52:
    output = WHITE;
    Serial.println("Setting to White");
    break;
    case 53:
    output = WARMWHITE;
    Serial.println("Setting to Warm White");
    break;
    case 54:
    output = MAGENTA;
    Serial.println("Setting to Magenta");
    break;
    case 55:
    output = YELLOW;
    Serial.println("Setting to Yellow");
    break;
    case 56:
    output = ORANGE;
    Serial.println("Setting to Orange");
    break;
    case 57:
    output = PINK;
    Serial.println("Setting to Pink");
    break;
    case 97:
    output = PURPLE;
    Serial.println("Setting to Purple");
    break;
    case 98:
    output = OLDLACE;
    Serial.println("Setting to Old Lace");
    break;
    default:
    output = BLACK;
    Serial.println("Setting to Black");
    break;
  }
  setColor(ledAnalogOne, output);
}

void setColor(int* led, byte* color)
{
  for(int i = 0; i < 3; i++)
  {
    analogWrite(led[i], 255 - color[i]);
  }
}

void setColor(int* led, const byte* color)
{
  byte tempByte[] = {color[0], color[1], color[2]};
  setColor(led, tempByte);
}

void fadeToColor(int* led, byte* startColor, byte* endColor, int fadeSpeed)
{
  int changeRed = endColor[0] - startColor[0];
  int changeGreen = endColor[1] - startColor[1];
  int changeBlue = endColor[2] - startColor[2];
  int steps = max(abs(changeRed),max(abs(changeGreen), abs(changeBlue)));
  for(int i = 0 ; i < steps; i++)
  {
    byte newRed = startColor[0] + (i * changeRed / steps);
    byte newGreen = startColor[1] + (i * changeGreen / steps);
    byte newBlue = startColor[2] + (i * changeBlue / steps);
    byte newColor[] = {newRed, newGreen, newBlue};
    setColor(led, newColor);
    delay(fadeSpeed);
  }
  setColor(led, endColor);
}

void fadeToColor(int* led, const byte* startColor, const byte* endColor, int fadeSpeed)
{
  byte tempByte1[] = {startColor[0], startColor[1], startColor[2]};
  byte tempByte2[] = {endColor[0], endColor[1], endColor[2]};
  fadeToColor(led, tempByte1, tempByte2, fadeSpeed);
}

cheerlights.py

import serial
import urllib
import time


port = '/dev/ttyUSB0'
# port = '/dev/tty.usbserial-A800eo5N'
baud = 9600
ser = serial.Serial(port, baud)


def read_current_colour():
    cheerlights_url = 'http://api.thingspeak.com/channels/1417/field/1/last.txt'
    return urllib.urlopen(cheerlights_url).read()


def get_colour_code(colour):
    colour_dict = {"red": '0',
                   "green": '1',
                   "blue": '2',
                   "cyan": '3',
                   "white": '4',
                   "warmwhite": '5',
                   "magenta": '6',
                   "yellow": '7',
                   "orange": '8',
                   "pink": '9',
                   "purple": 'a',
                   "oldlace": 'b',
                   "black": 'c'}

    return colour_dict.get(colour)


def main():
    old_value = 'None'
    current_value = ''
    while True:
        current_value = read_current_colour()
        if current_value != old_value:
            colour = get_colour_code(current_value)
            ser.write(colour)
            old_value = current_value
            time.sleep(60)


if __name__ == '__main__':
    main()