To control your PiFace Control And Display (CAD) from a browser, first login into your Raspberry Pi with your PiFace CAD connected, then open a Terminal and enter the command:
git clone https://gist.github.com/9620246.git
Move into this directory:
And run the file inside:
This will start a simple web server for you to access.
You can set the LCD text of PiFace CAD by adding the following line to the end of the address:
So the full command will be:
This text will appear on your PiFace CAD LCD screen.
To control other aspects of your PiFace CAD, such as the backlight, enter the following into the browser: