Hi there~,
It is not I2C interface, includes 4 pins, GND, VCC, DIO, CLK. We can connect DIO and CLK to any digital pin. You can define different pins as below. thanks.
</s>#include "RGBdriver.h"
#define CLK 2//pins definitions for the driver
#define DIO 3
RGBdriver Driver(CLK,DIO);<e>