Arduino/Magic-Jam.ino at master · vxav/Arduino · GitHub

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#include <Adafruit_WS2801.h>   // Link to WS2801 library: https://github.com/adafruit/Adafruit-WS2801-Library

int dataPin = 9;     // LED strip data
int clockPin = 10;   // LED strip clock
byte numPixel = 4;   // Number of LEDs in the LED strip < THIS VARIABLE IS NOT DYNAMIC

byte blue = 0;
byte red = 2;

int t = 0;

int thermPin = 0;     // Thermistor
int val = 0;          // Temperature as 255 scale value
byte TempMax = 30;    // Temperature at which the lamp is completely Red
byte TempMin = 15;    // Temperature at which the lamp is completely Red
byte Coefficient = 0; // Coefficient used to convert celsius temperature into a 255 scale value
int UpdateInt = 2000; // Interval between temperature checks (in ms)
byte tempCelcius = 0;  // Temperature in degrees Celcius

Adafruit_WS2801 strip = Adafruit_WS2801(numPixel, dataPin, clockPin);


//////////////////////////////////
// Initialisation
//////////////////////////////////
void setup() {
  Serial.begin(9600);
  strip.begin();
  Coefficient = TempMax - TempMin;
  Coefficient = 255/Coefficient;

  effectPoliceFull(3000);  // Startup effect, duration in ms in brackets
}


//////////////////////////////////
// Program
//////////////////////////////////
void loop() {

  tempCelcius = int(Thermistor(analogRead(thermPin)));
  val = tempCelcius * Coefficient;    // Convert to 255 scale: 255 is TempMax and 0 is TempMin

  Serial.print(tempCelcius);
  Serial.print(" degrees c. -   ");

  if (tempCelcius >= TempMin && tempCelcius <= TempMax) {
    if (val > 128) {
      setColor(Color(val,255-val,0));
    } else {
      setColor(Color(val,255-val,128-val));
    }
  } else if (tempCelcius < TempMin) {
    setColor(Color(0,255,128));
  } else {
    setColor(Color(255,0,0));
  }
  delay(UpdateInt);
}


//////////////////////////////////
// Gets temperature
//////////////////////////////////
double Thermistor(int RawADC) {
 double Temp;
 Temp = log(10000.0*((1024.0/RawADC-1)));
 Temp = 1 / (0.001129148 + (0.000234125 + (0.0000000876741 * Temp * Temp ))* Temp );
 Temp = Temp - 273.15;            // Convert Kelvin to Celcius

 return Temp;
}


//////////////////////////////////
// Control LED strip
//////////////////////////////////
void setColor(uint32_t c) {
  int i;

  for (i=0; i < strip.numPixels(); i++) {
      strip.setPixelColor(i, c);
      strip.show();
  }
}


//////////////////////////////////
// Create a 24 bit color value from R,G,B
//////////////////////////////////
uint32_t Color(byte r, byte b, byte g)
{
  uint32_t c;
  c = r;
  c <<= 8;
  c |= g;
  c <<= 8;
  c |= b;
  return c;
}


void effectPoliceFull(int i) {

  while (i>0) {
    strip.setPixelColor(blue,Color(0,0,255));
    strip.setPixelColor(red,Color(255,0,0));
    strip.show();

    if (blue==3){blue = 0;}else{blue++;}
    if (red==3){red = 0;}else{red++;}

    delay(250); // (1000ms / 8) meaning it does 2 rounds in 1 second with 4 LEDs

    i=i-250;
  }
}

void effectPoliceLight(int i) {

  while (i>0) {
    strip.setPixelColor(blue,Color(0,0,255));
    strip.setPixelColor((3 - blue),Color(0,0,0));
    strip.setPixelColor(red,Color(255,0,0));
    strip.setPixelColor((3 - red),Color(0,0,0));
    strip.show();

    if (blue==3){blue = 0;}else{blue++;}
    if (red==3){red = 0;}else{red++;}

    delay(250); // (1000ms / 8) meaning it does 2 rounds in 1 second with 4 LEDs

    i=i-250;
  }
}