hi, im fairly new to Arduino'ing, im planning to buy the Adafruit RGB LCD Shield with the built in MCP23017 i/o Expander.
however i want to use a 20x4 LCD instead of the standard 16x2.
will i have to do alot of modification to the library provided by Adafruit in order to work the 20x4 LCD?
heres what im looking to get: RGB LCD Shield Kit w/ 16x2 Character Display - Only 2 pins used! [NEGATIVE DISPLAY] : ID 714 : $24.95 : Adafruit Industries, Unique & fun DIY electronics and kits
heres a link to the library : GitHub - adafruit/Adafruit-RGB-LCD-Shield-Library
Thank you 