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circuitpython-async-button

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    circuitpython-async-button

a library for reading buttons using asyncio


Maintainers
1

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Introduction

.. image:: https://readthedocs.org/projects/circuitpython-async-button/badge/?version=latest :target: https://circuitpython-async-button.readthedocs.io/ :alt: Documentation Status

.. image:: https://img.shields.io/discord/327254708534116352.svg :target: https://adafru.it/discord :alt: Discord

.. image:: https://github.com/furbrain/CircuitPython_async_button/workflows/Build%20CI/badge.svg :target: https://github.com/furbrain/CircuitPython_async_button/actions :alt: Build Status

.. image:: https://img.shields.io/badge/code%20style-black-000000.svg :target: https://github.com/psf/black :alt: Code Style: Black

This library provides an asynchronous way to wait for buttons to be pressed. It also provides detection of single, double and triple clicks, and also long presses.

Dependencies

This driver depends on:

  • Adafruit CircuitPython <https://github.com/adafruit/circuitpython>_
  • CircuitPython asyncio module <https://github.com/adafruit/Adafruit_CircuitPython_asyncio>_

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>_.

Installing from PyPI

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

.. code-block:: shell

pip3 install circuitpython-async-button

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

.. code-block:: shell

sudo pip3 install circuitpython-async-button

To install in a virtual environment in your current project:

.. code-block:: shell

mkdir project-name && cd project-name
python3 -m venv .venv
source .env/bin/activate
pip3 install circuitpython-async-button

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 async_button

Or the following command to update an existing version:

.. code-block:: shell

circup update

Usage

There are two classes:

  • SimpleButton: This allows to await for presses and releases

    .. code-block:: python

    button = async_button.SimpleButton(board.D5, True) await button.pressed

  • Button: This has much more features. It creates a background process to monitor the button and allows the user to await for single clicks, double clicks, long clicks etc. It must be instantiated in an asynchronous environment

    .. code-block:: python

    button = async_button.Button(board.D5, True) click = await button.wait_for_click() if click == button.DOUBLE: print("Double click!")

See the examples folder for full demonstrations

Documentation

API documentation for this library can be found on Read the Docs <https://circuitpython-async-button.readthedocs.io/>_.

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/furbrain/CircuitPython_async_button/blob/HEAD/CODE_OF_CONDUCT.md>_ before contributing to help this project stay welcoming.

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