1.0.17

Introduction
============


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    :alt: Code Style: Ruff

Python library for PCF8574 GPIO expander


Dependencies
=============
This driver depends on:

* `Adafruit CircuitPython <https://github.com/adafruit/circuitpython>`_
* `Bus Device <https://github.com/adafruit/Adafruit_CircuitPython_BusDevice>`_

Please ensure all dependencies are available on the CircuitPython filesystem.
This is easily achieved by downloading
`the Adafruit library and driver bundle <https://circuitpython.org/libraries>`_
or individual libraries can be installed using
`circup <https://github.com/adafruit/circup>`_.

Designed for use with the Adafruit PCF8574 GPIO expander breakout board.

`Purchase one from the Adafruit shop <http://www.adafruit.com/products/5545>`_


Installing from PyPI
=====================

On supported GNU/Linux systems like the Raspberry Pi, you can install the driver locally `from
PyPI <https://pypi.org/project/adafruit-circuitpython-pcf8574/>`_.
To install for current user:

.. code-block:: shell

    pip3 install adafruit-circuitpython-pcf8574

To install system-wide (this may be required in some cases):

.. code-block:: shell

    sudo pip3 install adafruit-circuitpython-pcf8574

To install in a virtual environment in your current project:

.. code-block:: shell

    mkdir project-name && cd project-name
    python3 -m venv .venv
    source .venv/bin/activate
    pip3 install adafruit-circuitpython-pcf8574



Installing to a Connected CircuitPython Device with Circup
==========================================================

Make sure that you have ``circup`` installed in your Python environment.
Install it with the following command if necessary:

.. code-block:: shell

    pip3 install circup

With ``circup`` installed and your CircuitPython device connected use the
following command to install:

.. code-block:: shell

    circup install adafruit_pcf8574

Or the following command to update an existing version:

.. code-block:: shell

    circup update

Usage Example
=============

Example usage of the library can be found in the ``examples/`` folder.

Documentation
=============
API documentation for this library can be found on `Read the Docs <https://docs.circuitpython.org/projects/pcf8574/en/latest/>`_.

For information on building library documentation, please check out
`this guide <https://learn.adafruit.com/creating-and-sharing-a-circuitpython-library/sharing-our-docs-on-readthedocs#sphinx-5-1>`_.

Contributing
============

Contributions are welcome! Please read our `Code of Conduct
<https://github.com/adafruit/Adafruit_CircuitPython_PCF8574/blob/HEAD/CODE_OF_CONDUCT.md>`_
before contributing to help this project stay welcoming.