Is 1) A development board and 2) A Software (Arduino IDE)

Used for programming Microcontrollers with almost no knowledge of electronics.

Its simplicity, USB connection, added to its distribution as Hardware and Free Software, make Arduino a very valuable tool for all kinds of inventions, devices and installations that have sensors and interact with real-world objects.

Create facilities, home automation projects, control lights, motors and safety systems among thousands of applications in STEAM fields (Science, Technology, Engineering, Arts & Mathmatics).