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).
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