I2C LCD Controller module for displaying data on LCD by using only 2 micro-controller pins.
Getting started with the I2C LCD Controller Module for 1602 or 2004
In this tutorial, you will see how to connect i2c LCD display (Liquid Crystal Display) to Arduino using the i2c module. Before starting this article we will see what is i2c. I2C (I-square-C i.e IIC) means inter-integrated communication protocol. This is usually used to communicate between one master and multiple slaves. One of the best things about using I2C is we can reduce the connections (wiring). If you use normal LCD display, you need a total number of connections are 12. If you use I2C LCD display, you need only just 4 connection. By seeing the example you may know the advantage of I2C protocol. I2C protocol is also known as 2 line protocol.