Connection Diagram

I2C LCD Connection Diagram

NOTE: V1.2 has a different power pinout from V1.1, please check the history v

ersion for the old connection diagram.

Arduino UNO: connect SDA to pin A4 and SCL to pin A5 on your Arduino.

Arduino Leonardo: connect SDA to digital pin 2 and SCL to digital pin 3 on your Arduino.

Library Support Functions

 LiquidCrystal_I2C() //set the LCD address for a 16 chars and 2 line display

 init() //Initialization for the LCD

 clear() //clear display, set cursor position to zero

 home() //set cursor position to zero

 createChar() //Fill the first 8 CGRAM locations with custom characters

 setCursor() //set the position of the cursor

 cursor() //Turns the underline cursor on