The library provides basic functions for displaying text and controlling the backlight on the LCD. The library is based on two previous works by Batutay (2023, 2024) that implemented libraries for the ...

GPIO expanders equipped with a PCF8574 use the address 0x27, while those using PCF8574A chips use 0x3F. Consult your LCD's documentation. Another using declaration creates an instance of Pcf8574 and ...