How to Display Text on LCD Arduino: Simple Guide

To display text on an LCD with Arduino, use the LiquidCrystal library. Initialize the LCD with the correct pins, then use lcd.print() to show your text on the screen.

Syntax

First, include the LiquidCrystal library. Then create an lcd object with the pins connected to your LCD. Use lcd.begin(cols, rows) to set the screen size. Finally, use lcd.print() to display text.

• LiquidCrystal(rs, enable, d4, d5, d6, d7): sets pins
• lcd.begin(cols, rows): sets LCD size
• lcd.print(text): prints text on LCD

arduino

#include <LiquidCrystal.h>

LiquidCrystal lcd(rs, enable, d4, d5, d6, d7);

void setup() {
  lcd.begin(cols, rows);
  lcd.print("Your text here");
}

void loop() {
  // your code
}

Example

This example shows how to display "Hello, World!" on a 16x2 LCD connected to Arduino pins 12, 11, 5, 4, 3, and 2.

arduino

#include <LiquidCrystal.h>

// Initialize the library with the numbers of the interface pins
LiquidCrystal lcd(12, 11, 5, 4, 3, 2);

void setup() {
  // Set up the LCD's number of columns and rows:
  lcd.begin(16, 2);
  // Print a message to the LCD.
  lcd.print("Hello, World!");
}

void loop() {
  // Nothing needed here
}

Output

Hello, World!

Common Pitfalls

Common mistakes include:

• Not initializing the LCD with lcd.begin() before printing.
• Using wrong pin numbers in the LiquidCrystal constructor.
• Trying to print text before setup() runs.
• Not connecting the LCD's power or contrast pins properly.

Always check wiring and initialization order.

arduino

// Wrong: printing before begin
#include <LiquidCrystal.h>
LiquidCrystal lcd(12, 11, 5, 4, 3, 2);

void setup() {
  lcd.print("Oops!"); // Wrong: no lcd.begin()
  lcd.begin(16, 2);
}

void loop() {}

// Right way:
#include <LiquidCrystal.h>
LiquidCrystal lcd(12, 11, 5, 4, 3, 2);

void setup() {
  lcd.begin(16, 2);
  lcd.print("Correct!");
}

void loop() {}

Quick Reference

Remember these key steps:

• Include LiquidCrystal.h
• Initialize with correct pins
• Call lcd.begin(cols, rows) in setup()
• Use lcd.print() to show text
• Check wiring for power and contrast

Key Takeaways

Always initialize the LCD with lcd.begin() before printing text.

Use the LiquidCrystal library and specify correct Arduino pins.

lcd.print() shows text on the LCD screen.

Check your wiring carefully, especially power and contrast pins.

Print text only after setup() runs to avoid errors.