I've been working on a project for several months now,

Nick_Hurst · July 4, 2018, 12:40am

I’ve been working on a project for several months now, and finally found almost the exact code I needed for the computer side, added and changed some code around and now everything works on the computer end, I will then send data to my Arduino Uno R3 via serial, split the data up, and figure out what number means what color (i.e. If I get the data “0,2,0,1,0,0” turn that into “black, green, black, blue, black, black”) I know how to do that and everything, my question is, the data I receive will have 16 different numbers, I have an LED strip of about 150 LEDs, is there a simple stretch it out so those 16 numbers reach all the LEDs? as in
led[0-9] = 0x000000
led[10-19] = 0x00ff00
led[20-29] = 0x000000
and so on, like I said, I can do the splitting and figure out how many LEDs need to be the same color, I just need to know if there is a better way of addressing several LEDs without iterating through every LED

marmil · July 4, 2018, 5:21am

I think what you’re looking for is CRGBSet. As long as each group is a continuous range of pixels you can use this. Here’s a basic example.

github.com

marmilicious/FastLED_examples/blob/master/CRGBSet_example.ino

// Marc Miller, Jan 2016

#include "FastLED.h"
#define NUM_LEDS 32

//CRGB leds[NUM_LEDS];  // Not using this.  Using CRGBArray instead.
CRGBArray<NUM_LEDS> leds;

CRGBSet partA(leds(6,9));  // Define custom pixel range with a name.
CRGBSet partB(leds(22,25));  // Define custom pixel range with a name.

CHSV colorOne(0,222,255);  // Define a custom color.
CHSV colorTwo(82,222,255);  // Define a custom color.

//---------------------------------------------------------------
void setup() { 
  FastLED.addLeds<LPD8806, 11, 13, GRB>(leds, NUM_LEDS);
  FastLED.setBrightness(255);
}

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github.com

marmilicious/FastLED_examples/blob/master/CRGBSet_example.ino

// Marc Miller, Jan 2016

#include "FastLED.h"
#define NUM_LEDS 32

//CRGB leds[NUM_LEDS];  // Not using this.  Using CRGBArray instead.
CRGBArray<NUM_LEDS> leds;

CRGBSet partA(leds(6,9));  // Define custom pixel range with a name.
CRGBSet partB(leds(22,25));  // Define custom pixel range with a name.

CHSV colorOne(0,222,255);  // Define a custom color.
CHSV colorTwo(82,222,255);  // Define a custom color.

//---------------------------------------------------------------
void setup() { 
  FastLED.addLeds<LPD8806, 11, 13, GRB>(leds, NUM_LEDS);
  FastLED.setBrightness(255);
}

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Ken_White · July 5, 2018, 1:49am

@Nick_Hurst - @marmil is correct. CRGBSet will help you do what you want to accomplish. Here are three of my sketches using CRGBSet:

gist.github.com

https://gist.github.com/chemdoc77/31632b540908b6788c9340989eeb8bfc

CRGBSet_Example_3_with_array_fill__and_colorwipe.ino

// Testing FastLED's CRGBSet array with a fill the whole array function and with a colorwipe function
// by Chemdoc77

#include "FastLED.h"
#define NUM_LEDS 24
#define Data_Pin 6
#define chipset NEOPIXEL
#define BRIGHTNESS  50

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gist.github.com

https://gist.github.com/chemdoc77/80ab638588399c9a09e26a296d56f6e6

CRGBSet_Example_2_with_solidfill_and_rainbowfill

// Testing FastLED's CRGBSet array function and using it with the fill_solid and fill_rainbow functions.
// by Chemdoc77

#include "FastLED.h"
#define NUM_LEDS 24
#define Data_Pin 6
#define chipset NEOPIXEL
#define BRIGHTNESS  50

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gist.github.com

https://gist.github.com/chemdoc77/25d8b91d28f37c87aaadcd9ff02f8c78

CRGBSet_Example_1

// Testing the CRGBSet array function and using it in an array of CRGBSET arrays
//by Chemdoc77

#include "FastLED.h"
#define NUM_LEDS 24
#define Data_Pin 6
 #define chipset NEOPIXEL
#define BRIGHTNESS  50

CRGB rawleds[NUM_LEDS];

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