Introduction

The ESP32-S3 Super Mini is a powerful compact development board based on the ESP32-S3 chip. It provides high performance, WiFi, Bluetooth Low Energy (BLE), low power consumption, and plenty of GPIO pins for IoT and embedded projects, making it ideal for the ESP32-S3 Super Mini LCD project. This ESP32-S3 Super Mini LCD project will allow you to build various applications. In this ESP32-S3 Super Mini tutorial, we will explore these applications in detail

This project is perfect for:

• IoT display projects
• Sensor monitoring systems
• Smart home devices
• Embedded electronics experiments
• ESP32-S3 beginner projects

Project Overview

Components Required

The ESP32-S3 Super Mini LCD project allows for various applications including weather displays and home automation systems.

ESP32-S3 Super Mini Features

• ESP32-S3 dual-core processor
• 240 MHz clock speed
• Built-in WiFi
• Bluetooth Low Energy support
• USB Type-C programming
• Multiple GPIO pins
• Low power operation
• Compatible with Arduino IDE
• Suitable for AI, IoT and automation projects

16×4 I2C LCD Display

A standard LCD normally requires many GPIO pins, but an I2C adapter reduces the connection to only four wires.

LCD I2C Pins

ESP32-S3 Super Mini I2C LCD Pinout

The ESP32-S3 allows flexible I2C pin assignment.

Wiring Connection

Connection Diagram

ESP32-S3 Super Mini        16x4 I2C LCD

5V/VIN  ------------------ VCC

GND     ------------------ GND

GPIO12  ------------------ SDA

GPIO11  ------------------ SCL

ESP32-S3 Super Mini        16x4 I2C LCD

5V/VIN  ------------------ VCC

GND     ------------------ GND

GPIO12  ------------------ SDA

GPIO11  ------------------ SCL

Installing Required Library

Open Arduino IDE:

Sketch
 → Include Library
 → Manage Libraries

Sketch
 → Include Library
 → Manage Libraries

Install:

1. LiquidCrystal I2C Library
2. Wire Library (built into Arduino IDE)

Arduino Code: ESP32-S3 Super Mini with 16×4 LCD

#include <Wire.h>
#include <LiquidCrystal_I2C.h>

// LCD address and size
LiquidCrystal_I2C lcd(0x27, 16, 4);

void setup()
{
  // ESP32-S3 custom I2C pins
  Wire.begin(12, 11);

  lcd.init();
  lcd.backlight();

  lcd.setCursor(0,0);
  lcd.print("ESP32-S3 Super");

  lcd.setCursor(0,1);
  lcd.print("Mini + LCD 16x4");

  lcd.setCursor(0,2);
  lcd.print("I2C Display Test");

  lcd.setCursor(0,3);
  lcd.print("Hello World!");
}

void loop()
{

}

#include <Wire.h>
#include <LiquidCrystal_I2C.h>

// LCD address and size
LiquidCrystal_I2C lcd(0x27, 16, 4);

void setup()
{
  // ESP32-S3 custom I2C pins
  Wire.begin(12, 11);

  lcd.init();
  lcd.backlight();

  lcd.setCursor(0,0);
  lcd.print("ESP32-S3 Super");

  lcd.setCursor(0,1);
  lcd.print("Mini + LCD 16x4");

  lcd.setCursor(0,2);
  lcd.print("I2C Display Test");

  lcd.setCursor(0,3);
  lcd.print("Hello World!");
}

void loop()
{

}

Code Explanation

Include Libraries

#include <Wire.h>
#include <LiquidCrystal_I2C.h>

#include <Wire.h>
#include <LiquidCrystal_I2C.h>

The Wire library enables I2C communication, while LiquidCrystal_I2C controls the LCD.

LCD Configuration

LiquidCrystal_I2C lcd(0x27,16,4);

LiquidCrystal_I2C lcd(0x27,16,4);

• 0x27 = Common I2C LCD address
• 16 = Number of columns
• 4 = Number of rows

I2C Pin Setup

Wire.begin(12,11);

Wire.begin(12,11);

ESP32-S3 uses:

• GPIO12 as SDA
• GPIO11 as SCL

Circuit Diagram

Finding LCD I2C Address

Some LCD modules use:

• 0x27
• 0x3F

If the display does not work, upload an I2C scanner sketch to find the correct address.

Common Problems and Solutions

LCD Shows Nothing

Check:

• LCD contrast adjustment potentiometer
• Correct I2C address
• Proper SDA/SCL wiring
• Power supply

Compilation Error

Make sure:

• Correct ESP32 board is selected
• ESP32 board package is installed
• LiquidCrystal I2C library is installed

Wrong Characters Displayed

Try changing:

lcd(0x27,16,4)

lcd(0x27,16,4)

to:

lcd(0x3F,16,4)

lcd(0x3F,16,4)

Applications

This ESP32-S3 LCD project can be used for:

• Weather station displays
• Temperature monitoring
• Smart home controllers
• Clock projects
• IoT dashboards
• Sensor data displays
• Robotics projects

Conclusion

The combination of the ESP32-S3 Super Mini and 16×4 I2C LCD creates a simple but powerful embedded display system. With only four wires, you can build compact IoT projects with real-time information display.

The ESP32-S3’s processing power, wireless features, and flexible GPIO make it an excellent choice for modern electronics projects.

This ESP32-S3 Super Mini LCD project can be used for:

In this ESP32-S3 Super Mini LCD project, you’ll discover how to leverage the power of modern embedded systems.

With the ESP32-S3 Super Mini LCD project, you are well-equipped to create efficient and innovative solutions.