Introduction
============
.. image:: https://readthedocs.org/projects/adafruit-circuitpython-matrixkeypad/badge/?version=latest
:target: https://docs.circuitpython.org/projects/matrixkeypad/en/latest/
:alt: Documentation Status
.. image:: https://raw.githubusercontent.com/adafruit/Adafruit_CircuitPython_Bundle/main/badges/adafruit_discord.svg
:target: https://adafru.it/discord
:alt: Discord
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:target: https://github.com/adafruit/Adafruit_CircuitPython_MatrixKeypad/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 simple helper library lets you create objects that will scan and detect keypresses on passive matrix keypads
Dependencies
=============
This driver depends on:
* `Adafruit CircuitPython <https://github.com/adafruit/circuitpython>`_
Please ensure all dependencies are available on the CircuitPython filesystem.
This is easily achieved by downloading
`the Adafruit library and driver bundle <https://github.com/adafruit/Adafruit_CircuitPython_Bundle>`_.
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-matrixkeypad/>`_. To install for current user:
.. code-block:: shell
pip3 install adafruit-circuitpython-matrixkeypad
To install system-wide (this may be required in some cases):
.. code-block:: shell
sudo pip3 install adafruit-circuitpython-matrixkeypad
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-matrixkeypad
Usage Example
=============
.. code-block:: python
import adafruit_matrixkeypad
from digitalio import DigitalInOut
import board
# Classic 3x4 matrix keypad
cols = [DigitalInOut(x) for x in (board.D2, board.D0, board.D4)]
rows = [DigitalInOut(x) for x in (board.D1, board.D6, board.D5, board.D3)]
keys = ((1, 2, 3),
(4, 5, 6),
(7, 8, 9),
('*', 0, '#'))
keypad = adafruit_matrixkeypad.Matrix_Keypad(rows, cols, keys)
while True:
keys = keypad.pressed_keys
if keys:
print("Pressed: ", keys)
time.sleep(0.1)
Documentation
=============
API documentation for this library can be found on `Read the Docs <https://docs.circuitpython.org/projects/matrixkeypad/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_MatrixKeypad/blob/main/CODE_OF_CONDUCT.md>`_
before contributing to help this project stay welcoming.
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