Introduction
When working on Arduino projects, displaying information is very important. Instead of relying only on serial monitor, you can use an LCD display to show text, numbers, and sensor readings in real time.
One of the most common displays used in Arduino is the 16×2 LCD (16 characters × 2 rows). Normally, this LCD requires many pins for wiring, which makes the circuit messy. To solve this, we use an I2C (Inter-Integrated Circuit) LCD module that reduces wiring to just two pins (SDA & SCL).
In this tutorial, we will learn the theory behind I2C communication, the required components, the circuit connection, and the Arduino code to display text on the LCD.