A demo on how to use a light sensor (LDR) from the analog input and display the intensity that it reads from the LCD. It might be simple as you think but the LCD requires a device driver in order for the developer to use it.
For complete details, see the project here.
MATLAB 8.5 (R2015a)
MATLAB Search Path
/ /LCD_Tempo /LCD_Tempo/model
Arduino Support Package