myled.ino v2

// This #include statement was automatically added by the Spark IDE.
#include "SparkIntervalTimer/SparkIntervalTimer.h"
#include "LPD6803.h"

int dataPin = D3;       // 'yellow' wire (Arduino 4) [WAS D3]
int clockPin = D4;      // 'white' wire (Arduino 7) [WAS D4]

// Don't forget to connect 'blue' to ground and 'red' to +5V

// Set the first variable to the NUMBER of pixels. 20 = 20 pixels in a row
LPD6803 strip = LPD6803(50, dataPin, clockPin);


int numberofracks=8;
int setflag=0;
int initflag=0;

// Set first element to the number of racks
uint8_t rackdata[8][3]= {
            {0,0,0}, //
            {0,0,0}, //
            {0,0,0}, //
            {0,0,0}, //
            {0,0,0}, //
            {0,0,0}, //
            {0,0,0}, //
            {0,0,0}, //
        };

void setup() {

  Spark.function("ledSet", ledSet); // expects 'd' separated integers (racknum,red,green,blue)

  // curl https://api.spark.io/v1/devices/jjcore1/ledset -d access_token=$TOKENID -d "c=4-32-32-32-"

 // API Works with next line commented out (but lights don't function)
 //  initflag=1;

}


void loop() {

if (initflag ==1) {
    strip.begin();
    strip.show();
    delay(50);
    colorWipe(Color(0,0,0),50);
    delay(50);
    initflag=0;
}

if (setflag == 1) {
        setall();
        setflag=0;
        delay(50);
}

/*
  int r, f;

  for (r=1; r<9; r++) {
      for (f=0; f<6; f++) {
            rackWipe(Color(0, 0, 63), 50, r); // Make rack r red
            delay(50);
            rackWipe(Color(15, 0, 0), 50, r); // Make rack r blue
            delay(50);
      }
  }

*/

}

void setall() {

    uint8_t rc;
    for (rc=0; rc<numberofracks; rc++) {
        rackWipe(Color(rackdata[rc][2], rackdata[rc][1], rackdata[rc][0]), 50, rc+1);
        delay (50);
    }

}

// fill the dots one after the other with said color
// good for testing purposes
void colorWipe(uint16_t c, uint8_t wait) {
  int i;

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

// fill the dots one after the other with said color
// good for testing purposes
void rackWipe(uint16_t c, uint8_t wait, uint8_t rack) {
  int i;

  for (i=(rack*6)-6; i < (rack*6); i++) {
      strip.setPixelColor(i, c);
      strip.show();
      delay(wait);
  }
}


int ledSet(String c) {


    int racknum;
    int red;
    int green;
    int blue;

    int loc1=0;
    int loc2=0;
    int loc3=0;
    int loc4=0;

    if (setflag==1) {
        return -1;
    }

    loc1 = c.indexOf("-");
    racknum = c.substring(0,loc1).toInt();


    loc2 = c.indexOf("-",loc1+1);
    red = c.substring(loc1+1,loc2).toInt();

    loc3 = c.indexOf("-",loc2+1);
    green = c.substring(loc2+1,loc3).toInt();

    loc4 = c.indexOf("-",loc3+1);
    blue = c.substring(loc3+1,loc4).toInt();


    rackdata[racknum-1][0]=red;
    rackdata[racknum-1][1]=green;
    rackdata[racknum-1][2]=blue;

    setflag=1;

    return (racknum-1);

}

/* Helper functions */

// Create a 15 bit color value from R,G,B
unsigned int Color(byte r, byte g, byte b)
{
  //Take the lowest 5 bits of each value and append them end to end
  return( ((unsigned int)g & 0x1F )<<10 | ((unsigned int)b & 0x1F)<<5 | (unsigned int)r & 0x1F);
}