What is wiring.h?

Wiring.h is a C++ header file used in Arduino programming. It provides a set of functions for controlling the inputs and outputs of an Arduino board, including digital and analog I/O, PWM, interrupts, and serial communication. The functions are designed to abstract the low-level details of interacting with microcontroller hardware, making it easier for developers to write code and create projects without needing to be experts in electronics. Wiring.h is included by default in the Arduino Integrated Development Environment (IDE) and is used in conjunction with other libraries and code to implement various projects and applications on the Arduino platform.