Generic Classes

.. currentmodule:: gpiozero

The GPIO Zero class hierarchy is quite extensive. It contains several base classes (most of which are documented in their corresponding chapters):

:class:`Device` is the root of the hierarchy, implementing base functionality like :meth:`~Device.close` and context manager handlers.
:class:`GPIODevice` represents individual devices that attach to a single GPIO pin
:class:`SPIDevice` represents devices that communicate over an SPI interface (implemented as four GPIO pins)
:class:`InternalDevice` represents devices that are entirely internal to the Pi (usually operating system related services)
:class:`CompositeDevice` represents devices composed of multiple other devices like HATs

There are also several mixin classes for adding important functionality at numerous points in the hierarchy, which is illustrated below:

Device

.. autoclass:: Device
    :members: close, closed, value, is_active

.. autoclass:: ValuesMixin(...)
    :members:

.. autoclass:: SourceMixin(...)
    :members:

.. autoclass:: SharedMixin(...)
    :members: _shared_key

.. autoclass:: EventsMixin(...)
    :members:

.. autoclass:: HoldMixin(...)
    :members: