LCD Display with I2C

LCD Display with I2C Experiment

Introduction

The LCD display with I2C module simplifies interfacing with LCD screens by reducing the required number of connections. This experiment demonstrates how to use the I2C interface to display text on a 16x2 LCD screen with Arduino.

Components Needed

Circuit Setup

  1. Connect the GND pin of the I2C module to the GND on the Arduino.
  2. Connect the VCC pin of the I2C module to the 5V pin on the Arduino.
  3. Connect the SDA pin of the I2C module to the Arduino A4 pin (Uno/Nano).
  4. Connect the SCL pin of the I2C module to the Arduino A5 pin (Uno/Nano).

Ensure the I2C address of your LCD module matches the one used in the code (commonly 0x27).

Code for LCD with I2C

Upload the following code to your Arduino to display text on the LCD:


// Include the LiquidCrystal_I2C library
#include 
#include 

// Set the LCD address to 0x27 (check your module's address)
LiquidCrystal_I2C lcd(0x27, 16, 2);

void setup() {
    // Initialize the LCD
    lcd.begin();
    lcd.backlight();

    // Display a message on the LCD
    lcd.setCursor(0, 0); // Set cursor to the first row, first column
    lcd.print("Hello, World!");
    lcd.setCursor(0, 1); // Set cursor to the second row, first column
    lcd.print("I2C is Awesome!");
}

void loop() {
    // No additional code is needed for this example
}

Explanation

The code initializes the LCD with I2C communication, turns on the backlight, and displays text. Here's how the code works:

Troubleshooting