The OKY2201 is an expansion board and shield for Arduino MEGA2560 manufactured by OKYSTAR. This module is equipped with an array of features, including an XBee interface, x3 relays, infrared receiver and transmitter, RTC, DS18B20 temperature sensor, analog and digital I/O ports, and power supply filters. The board is designed to ease prototyping and layering of complex systems. It can be used by makers and developers in a variety of applications such as robotics, automotive, home automation, and industrial automation.