WS2812B Arduino Code

We will use the FastLED library to control the WS2812B LED strip. You can install it manually by downloading it from the FastLED GitHub page and putting it into the Arduinos library folder. Or you can install it using the Arduino IDE’s library management page.

To open the library management window, navigate to Tools > Manage Libraries.

Wait for the library manager to load properly. Then search “fastled”. You will find a couple of entries there. Select the right library and click install.

It will install the library. Now restart the Arduino IDE to load the library properly.

After installing the library properly, upload the below code to turn on the first three LEDs.

#include <FastLED.h>

#define DATA_PIN 3
#define NUM_LEDS 8
#define BRIGHTNESS 64
#define LED_TYPE WS2812B
#define COLOR_ORDER GRB

// Define the array of leds
CRGB leds[NUM_LEDS];

#define UPDATES_PER_SECOND 100

void setup() {
FastLED.addLeds<LED_TYPE, DATA_PIN, COLOR_ORDER>(leds, NUM_LEDS);
FastLED.setBrightness(BRIGHTNESS);
}

void loop() {
// Turn the LED on
leds[0] = CRGB::Red;
leds[1] = CRGB::Green;
leds[2] = CRGB::Blue;
FastLED.show();
delay(10);
}