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FastLED Reference Guide

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FastLED Reference Guide

Difficulty Level: ⭐ All Levels Time to Find Information: 2-5 minutes (depending on what you're looking up) Prerequisites: None (reference materials are self-contained and can be used at any point in your learning journey)

You'll Find:

  • Complete API function reference with syntax and parameters for all FastLED functions
  • Platform-specific pin recommendations and limitations for Arduino, ESP32, Teensy, STM32, and more
  • Supported LED chipset list with configuration examples for WS2812B, APA102, SK6812, and others
  • Quick code snippets for common operations (setup, colors, array operations)
  • External resources and community links for additional FastLED help

This section provides quick reference materials for FastLED development.

Contents

Quick Navigation

Common Operations

Setup and Display

cpp
FastLED.addLeds<LED_TYPE, DATA_PIN, COLOR_ORDER>(leds, NUM_LEDS);
FastLED.show();
FastLED.setBrightness(50);

Color Creation

cpp
CRGB color = CRGB(255, 0, 0);    // RGB
CHSV color = CHSV(0, 255, 255);  // HSV

Array Operations

cpp
fill_solid(leds, NUM_LEDS, CRGB::Red);
fadeToBlackBy(leds, NUM_LEDS, 20);
blur1d(leds, NUM_LEDS, 50);

Platform Support

FastLED supports a wide range of microcontrollers:

  • Arduino (Uno, Mega, Leonardo, etc.)
  • ESP32 / ESP8266
  • Teensy (3.x, 4.x)
  • STM32
  • Raspberry Pi Pico (RP2040)
  • And many more!

See Pin Configurations for platform-specific details.

LED Chipset Support

FastLED supports numerous LED chipsets including:

  • WS2812B (NeoPixel)
  • APA102 (DotStar)
  • SK6812
  • WS2813
  • And many more!

See LED Types for complete list and usage examples.

Additional Resources

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