Arduino is a convenient, flexible and easy-to-use open source hardware product with rich interfaces, digital I/O ports, analog I/O ports, and support for SPI, IIC, and UART serial communication. It can sense the environment through a variety of sensors, and control and control the lighting, motors and other devices to feedback and influence the environment. It has no complicated underlying code of the microcontroller, no incomprehensible assembly, just a simple and practical function. And with a simple programming environment IDE, great freedom, scalability can be very high! The standardized interface model provides a solid foundation for its sustainability.