Led Tester

main.cpp

/**
 * TPM2 Example
 * with the FastLED library
 *
 * Copyright (c) 2019 Stephan Ruloff
 * https://github.com/rstephan/TPM2
 * 
 * GPL v2 only
 */

#include <Arduino.h>
#include <FastLED.h>

#define PIN 5
#define NUM_LEDS 40

CRGBArray<NUM_LEDS> leds;

void setup() { FastLED.addLeds<NEOPIXEL,PIN>(leds, NUM_LEDS); }

void loop(){ 
  static uint8_t hue;
  for(int i = 0; i < NUM_LEDS/2; i++) {   
    // fade everything out
    leds.fadeToBlackBy(20);

    // let's set an led value
    leds[i] = CHSV(hue++,255,80);

    // now, let's first 20 leds to the top 20 leds, 
    leds(NUM_LEDS/2,NUM_LEDS-1) = leds(NUM_LEDS/2 - 1 ,0);
    FastLED.delay(99);
  }
}

platformio.ini

;PlatformIO Project Configuration File
;
;   Build options: build flags, source filter
;   Upload options: custom upload port, speed and extra flags
;   Library options: dependencies, extra library storages
;   Advanced options: extra scripting
;
; Please visit documentation for the other options and examples
; https://docs.platformio.org/page/projectconf.html

[env:esp12e]
platform = espressif8266
board = esp12e
framework = arduino

lib_deps =
  https://github.com/FastLED/FastLED.git