This simple helper library lets you create objects that will scan and detect keypresses on passive matrix keypads
This driver depends on:
Please ensure all dependencies are available on the CircuitPython filesystem. This is easily achieved by downloading the Adafruit library and driver bundle.
Installing from PyPI¶
On supported GNU/Linux systems like the Raspberry Pi, you can install the driver locally from PyPI. To install for current user:
pip3 install adafruit-circuitpython-matrixkeypad
To install system-wide (this may be required in some cases):
sudo pip3 install adafruit-circuitpython-matrixkeypad
To install in a virtual environment in your current project:
mkdir project-name && cd project-name python3 -m venv .env source .env/bin/activate pip3 install adafruit-circuitpython-matrixkeypad
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)
Contributions are welcome! Please read our Code of Conduct before contributing to help this project stay welcoming.