MIKROE-1881 4x4 RGB Click Mikroe MIKROE-1881 4x4 RGB Click is a matrix with 16 smart RGB elements, creating a 4x4 display. The Mikroe MIKROE-1881 LEDs have built-in logic for direct communication with the MCU. The LEDs can be cascaded, communicating through a single line with the host MCU, ensuring seamless data transfer to adjacent elements without loss or distortion.