Arduino - lcd.begin()

Description

Initializes the interface to the LCD screen, and specifies the dimensions (width and height) of the display. begin() needs to be called before any other LCD library commands.

Syntax

lcd.begin(cols, rows)

Parameters

  • lcd: a variable of type LiquidCrystal
  • cols: the number of columns that the display has
  • rows: the number of rows that the display has

Example

Hardware Required

1×Arduino UNO or Genuino UNO
1×USB 2.0 cable type A/B
1×LCD
1×Potentiometer
1×Breadboard
1×Jumper Wires
1×(Optional) 9V Power Adapter for Arduino
1×(Recommended) Screw Terminal Block Shield for Arduino Uno
1×(Optional) Transparent Acrylic Enclosure For Arduino Uno
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Wiring Diagram

Arduino LCD Wiring Diagram

This image is created using Fritzing. Click to enlarge image

Arduino Code

#include <LiquidCrystal.h> LiquidCrystal lcd(11, 12, 2, 3, 4, 5); void setup() { lcd.begin(16, 2); // set up the LCD 16x2 lcd.print("hello, world!"); // print a message to the LCD } void loop() {}

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Arduino UNO R3
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