What level of control does a GPIO interface allow over digital lines?

The GPIO (General Purpose Input/Output) interface is designed to provide control over individual digital lines, allowing it to manipulate high and low states on a pin-by-pin basis. This single-bit control means that each GPIO pin can be set to either a high state (usually representing a binary '1') or a low state (representing a binary '0') independently of others.

This level of control is essential for various applications where precise interaction with hardware is required, such as turning an LED on or off, reading a switch, or controlling motors. In contrast to byte, kilobyte, or packet levels where multiple bits or larger data structures are handled collectively, the GPIO's single-bit control simplifies the interaction with hardware components by enabling direct manipulation of individual digital signals for specific tasks.