This tutorial describes how to interface a WS2812B RGB LED ring or Adafruit’s NeoPixel ring to ESP8266. The WS2812B is a smart RGB LED with a control circuit integrated in a 5050 SMD package. The RGB data transfer occurs through a single data input line using single NZR communication mode. Connection between the NeoPixel ring and ESP8266 is through a single data wire. I am using EasyESP-1 here for illustration. The Data In (DI) line of the NeoPixel ring connects to D1 pin of EasyESP-1. VCC and GND pins go to 3.3V and GND terminals of EasyESP-1. I used a 40 RGB LED NeoPixel-compatible LED