Interrupt-based matrix keypad library for Raspberry Pi
Project description
pad4pi
An interrupt-based Python 2/3 library for reading matrix keypad key presses using Raspberry Pi GPIO pins.
pip install pad4pi
Tested on a Raspberry Pi B+ using a 4x3 matrix keypad but should work with 4x4 and other sizes.
Usage
from pad4pi import rpi_gpio
KEYPAD = [
[1,2,3],
[4,5,6],
[7,8,9],
["*",0,"#"]
]
ROW_PINS = [4,14,15,17] # BCM numbering
COL_PINS = [18,27,22] # BCM numbering
factory = rpi_gpio.KeypadFactory()
# Try factory.create_4_by_3_keypad
# and factory.create_4_by_4_keypad for reasonable defaults
keypad = factory.create_keypad(keypad=KEYPAD, row_pins=ROW_PINS, col_pins=COL_PINS)
def printKey(key):
print(key)
# printKey will be called each time a keypad button is pressed
keypad.registerKeyPressHandler(printKey)
When your program exits, call keypad.cleanup() to ensure the Raspberry Pi’s GPIO pins are reset.
License
Licensed under GNU Lesser General Public License Version 3 (LGPL v3).
Project details
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pad4pi-1.0.0.tar.gz
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