The GPIO keypad input
We have seen how we can monitor inputs on the GPIO to launch applications and control the Raspberry Pi; however, sometimes we need to control third-party programs. Using the uInput library, we can emulate key presses from a keyboard (or even mouse movement) to control any program using our own custom hardware.
For more information about using uInput, visit http://tjjr.fi/sw/python-uinput/.
Getting ready
Perform the following steps to install uInput:
- First, we need to download
uInput.
You will need to download the uInput Python library from GitHub (~50 KB) using the following commands:
wget https://github.com/tuomasjjrasanen/python-uinput/archive/master.zipunzip master.zip
The library will unzip to a directory called python-uinput-master.
- Once completed, you can remove the ZIP file using the following command:
rm master.zip- Install the required packages using the following commands (if you have installed them already, the
apt-getcommand will ignore them):
sudo apt-get install...
