The LiquidCrystal_I2C library is a modified version of the standard LiquidCrystal library as found on the Arduino website.
This library is intended to be used when a parallel HD44780 compatible LCD is controlled over I2C using a Chinese PCF8574 extender, as sold on eBay.
Be aware that the Chinese PCF8574 extender is available in two versions, the PCF8574 and the PCF8574A, the only difference between the two is the I2C base address. See the documentation for details.
Library Download.
| Arduino code library: LiquidCrystal_I2C.zip |  |