on your website but nowhere could I find a reference to the interface library. Just need to specify SDA and SCL pins as 4th and 5th arguments when creating the LiquidCrystal_I2C object and then has the same functions of the standard LiquidCrystal_I2C library. This I2C 16x2 Arduino LCD Screen is using an I2C communication interface. This question is quite old, but I would like to suggest this LiquidCrystal Software I2C library, because I didn't found many other working resources online and this library implements I2C protocol in software, so you can use any input/output pin of your Arduino.
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