matrixQPi (Matrix Keypad for Raspberry Pi): a WiringPi-Python-based code for reading input from membrane keypad (matrix keypad) comes in 4x3 buttons.
matrixQPi_stdout.py is an example that will print pressed-button to
Calling the above script in a bash loop will print pressed-button repetitively:
$ while true; do matrixQPi_stdout.py -i; done
It basically reads one pressed key at a time, the above bash loop only repeats the reading
It will print the symbol of the pressed key found from the lookup. In this case the lookup contains symbols from regular phone dial-in key (digits 0, 1,..., 9 plus * and # signs)
As already stated above this requires WiringPi-Python installed to the
Raspberry Pi as library. However, since this library is already deprecated,
you should use WiringPi-Python@9c77bde commit. Hence, the library's
submodule can't also be used from calling
git submodule update --init.
You must copy manually WiringPi@89bbe97 commit, putting them under
WiringPi directory of the
WiringPi-Python. Once you have both correct
tree from Github, install the working version of this library then using
$ sudo python setup.py install
This has already tested using Raspberry Pi with Python 2.7.3rc2.
The class provides flexibility to use different matrix keypad size and symbol mapping as well as GPIO pins assigned for reading.
exampleXXX.py on how to use the class in practice. In general you need
- Button symbol character
- GPIO used as logical row and column of the matrix