Total newbie question have got a strip of ws2812b is it possible to set

Shaun_Constantine · October 12, 2016, 7:06pm

Total newbie question have got a strip of ws2812b is it possible to set a group of leds to the same colour without doing them individually say leds 1 to 6 green then 7 to 12red rtc

Andrew_Tuline · October 12, 2016, 7:17pm

You might be able to try:

fill_solid(leds,6, 0x00ff00);
fill_solid(leds+6,6, 0xff0000);

For repeating and animated patterns, I use sine waves, lop off the bottom and change the phase, so that I don’t have a pile of loops or have to count pixels. . . and if I’m smart enough, I’ll use millis() to control the speed rather than use those nasty blocking delay() functions.

Here’s an example using EVERY_N_MILLISECONDS()

https://github.com/atuline/FastLED-Demos/blob/master/one_sine/one_sine.ino

marmil · October 13, 2016, 3:31pm

Have a look into CRGBSet. Here’s an 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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Shaun_Constantine · October 14, 2016, 1:06pm

Thanks managed to get it working eventually