Gpiozero Flow

gpiozero is a Python library for Raspberry Pi that simplifies GPIO programming by abstracting hardware details into high-level device concepts like buttons and LEDs. The library supports three programming paradigms—procedural, event-based, and declarative—with the declarative approach enabling elegant "source" assignments that allow devices to control each other through standardized value ranges (0-1 for booleans and brightness, -1 to 1 for motors). The author describes plans for a web-based UI that would let users visually connect GPIO devices through drag-and-drop flow diagrams.