This is a Arduino library for Freenove WS2812B RGBLED Controller (Shorter name "Controller").
Although Arduino can directly control WS2812B LED, it needs to shut down all interrupts to ensure normal communication. It's very inconvenient.
The controller solves this problem well. It uses I2C or UART to communicate with Arduino. So you can easily control WS2812B LED through it.
And you can add it to almost all your Arduino projects without affecting them. Make your work look cool!

Here are some simple examples.

This example make your strip show a flowing rainbow.

#include "Freenove_WS2812B_RGBLED_Controller.h"

#define I2C_ADDRESS  0x20
#define LEDS_COUNT   10

//Freenove_WS2812B_Controller strip(&Serial1, LEDS_COUNT, TYPE_GRB, 115200UL);
Freenove_WS2812B_Controller strip(I2C_ADDRESS, LEDS_COUNT, TYPE_GRB);

void setup() {
  while (!strip.begin());
}

void loop() {
  for (int j = 0; j < 255; j += 2) {
    for (int i = 0; i < LEDS_COUNT; i++) {
      strip.setLedColorData(i, strip.Wheel((i * 256 / LEDS_COUNT + j) & 255));
    }
    strip.show();
    delay(2);
  }  
}

//Freenove_WS2812B_Controller strip(&Serial1, LEDS_COUNT, TYPE_GRB, 115200UL);
Freenove_WS2812B_Controller strip(I2C_ADDRESS, LEDS_COUNT, TYPE_GRB);

• Construction. Create a Controller object. The construction parameters determine the communication mode, I2C or UART.

strip.begin()

• Establish communication with the controller and send the number of LEDs to the controller. Return true successfully or false otherwise.

strip.setLedColorData(id, color);
strip.setLedColorData(id, r, g, b);

• Send the color data of the specified LED to the controller.
• Display color change after calling show function.
  • id: the index of led.
  • color: color value. egg, 0xFF0000 is RED color.
  • r,g,b: color value. 0-255.

strip.show();

• Immediately display the color data that has been sent.

strip.setLedColor(id, color);
strip.setLedColor(id, r, g, b);

• Send color data and display it immediately.
• It is equivalent to "strip.setLedColorData(id, color); strip.show();"
  • id: the index of led.
  • color: color value. egg, 0xFF0000 is RED color.
  • r,g,b: color value. 0-255.

strip.Wheel(i)

• A simple color picker.
  • i: 0-255.