I2C LCD

Note

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Kit purchase

Looking for parts? Check out our all-in-one kits below — packed with components, beginner-friendly guides, and tons of fun.

Name	Includes Arduino board	PURCHASE LINK
Ultimate Sensor Kit	Arduino Uno R4 Minima	BUY
Elite Explorer Kit	Arduino Uno R4 WiFi	BUY
3 in 1 Ultimate Starter Kit	Arduino Uno R4 Minima	BUY
Universal Maker Sensor Kit	×	BUY

Course Introduction

In this lesson, we will learn how to use the I2C LCD with Arduino.

Note

If this is your first time working with an Arduino project, we recommend downloading and reviewing the basic materials first.

Required Components

In this project, we need the following components:

SN	COMPONENT INTRODUCTION	QUANTITY	PURCHASE LINK
1	Arduino UNO R4 WIFI	1	BUY
2	USB Type-C cable	1
3	Breadboard	1	BUY
4	Wires	Several	BUY
5	I2C LCD 1602	1	BUY

Wiring

Common Connections:

I2C LCD 1602
- SDA: Connect to A4 on the Arduino.
- SCL: Connect to A5 on the Arduino.
- GND: Connect to GND on the Arduino.
- VCC: Connect to 5V on the Arduino.

Writing the Code

Note

You can copy this code into Arduino IDE.
To install the library, use the Arduino Library Manager and search for LiquidCrystal I2C and install it.
Don’t forget to select the board(Arduino UNO R4 WiFi/Minima) and the correct port before clicking the Upload button.

#include <LiquidCrystal_I2C.h>

// LCD address 0x27, 16 columns, 2 rows
LiquidCrystal_I2C lcd(0x27, 16, 2);

void setup() {
  lcd.init();       // Init LCD
  lcd.backlight();  // Turn on backlight
  lcd.clear();      // Clear screen
}

void loop() {
  // Display top message "Hello world!"
  lcd.setCursor(2, 0);
  lcd.print("Hello world!");
  delay(1000);
  lcd.clear();

  // Display bottom message "LCD Tutorial"
  lcd.setCursor(2, 1);
  lcd.print("LCD Tutorial");
  delay(1000);
  lcd.clear();
}