To link a standard 16×2 LCD directly with the microcontroller, for instance Arduino, you would need atleast 6 I/O pins to talk to the LCD. However, if you use an LCD module with I2C interface ...

This one’s a bit abstract. Remember those LCD games that became ... has been built into a web interface. [Tobie’s] part of the hack is to use an Arduino and a few buttons as the controller.