ESP8266 I2C LCD Display

This simple DIY project demonstrates how to connect an ESP8266 microcontroller to a 16×2 I2C LCD display and print a message. It uses the Wire and LiquidCrystal_I2C libraries to initialize and control the LCD.

Components Required

• ESP8266 (NodeMCU or ESP‑01)
• 16×2 I2C LCD display
• Jumper wires
• Breadboard (optional)

Wiring (ESP8266 → LCD)

Code Example

Hello World on LCD

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

LiquidCrystal_I2C lcd(0x27, 16, 2); // LCD address and size

void setup() {
  Wire.begin(2, 0);        // SDA = GPIO2, SCL = GPIO0
  lcd.init();              // Initialize LCD
  lcd.backlight();         // Turn on backlight
  lcd.print(" Hello World! ");
}

void loop() {
  // Nothing here
}
            

The LCD address 0x27 is common, but some displays use 0x3F.

Output

 Hello World!