Serial to FastLED

#include "FastLED.h"

//setup LEDs
#define NUM_LEDS 8
#define DATA_PIN 15
CRGB leds[NUM_LEDS];

//setup software serial buffer
char buff[NUM_LEDS*3];
int buffPos = 0;
char buffChar;

void setup ()
{
  Serial.begin (115200);
  FastLED.addLeds<NEOPIXEL, DATA_PIN>(leds, NUM_LEDS);
}

void loop()
{
  while (Serial.available() > 0) {
    buffChar = Serial.read();
    if (buffPos < NUM_LEDS*3) {
      buff[buffPos] = buffChar;
      buffPos++;
      if (buffPos == (NUM_LEDS*3)) {
        //clear leds and overwrite with buffer
        memset(leds, 0, sizeof(leds));
        memcpy(leds, buff, sizeof(leds));
        //clear buffer and reset position
        memset(buff, 0, sizeof(buff));
        buffPos = 0;
      }
    }
  }
  //update LEDs
  FastLED.show();
}