16x2 LCD with LiquidCrystal library in Arduino - Interactive Code Practice

Practice - 5 Tasks

1fill in blank

easy

Complete the code to initialize the LCD with 16 columns and 2 rows.

Arduino

#include <LiquidCrystal.h>

LiquidCrystal lcd(12, 11, 5, 4, 3, 2);

void setup() {
  lcd.[1](16, 2);
}

void loop() {
  // Your code here
}

Drag options to blanks, or click blank then click option'

Astart

Bbegin

Cinit

Dsetup

Attempts:

3 left

💡 Hint

Common Mistakes

Using 'start' or 'init' instead of 'begin'.

Trying to set size outside the setup function.

The begin method initializes the LCD with the specified number of columns and rows.

2fill in blank

medium

Complete the code to print the text "Hello, World!" on the LCD.

Arduino

void loop() {
  lcd.[1]("Hello, World!");
}

Drag options to blanks, or click blank then click option'

Aprint

Bwrite

Cdisplay

Dshow

Attempts:

3 left

💡 Hint

Common Mistakes

Using 'write' which prints a single character or byte.

Using non-existent methods like 'display' or 'show'.

The print method displays text on the LCD screen.

3fill in blank

hard

Fix the error in the code to set the cursor to the first column and second row.

Arduino

void loop() {
  lcd.setCursor([1], 1);
  lcd.print("Line 2");
}

Drag options to blanks, or click blank then click option'

A1

B-1

C2

D0

Attempts:

3 left

💡 Hint

Common Mistakes

Using 1 for the first column which is actually the second column.

Using negative numbers which are invalid.

LCD columns start at 0, so the first column is 0.

4fill in blank

hard

Fill both blanks to clear the LCD and then print "Ready" at the beginning.

Arduino

void loop() {
  lcd.[1]();
  lcd.setCursor([2], 0);
  lcd.print("Ready");
}

Drag options to blanks, or click blank then click option'

Aclear

B1

C0

Dhome

Attempts:

3 left

💡 Hint

Common Mistakes

Using 'home' instead of 'clear' to erase the screen.

Setting cursor to column 1 instead of 0.

clear() erases the display, and setCursor(0, 0) sets the cursor to the first column and first row.

5fill in blank

hard

Fill all three blanks to create a scrolling message that moves left on the LCD.

Arduino

void loop() {
  lcd.clear();
  lcd.setCursor([1], 0);
  lcd.print("Scrolling");
  lcd.[2]();
  delay([3]);
}

Drag options to blanks, or click blank then click option'

A15

BscrollDisplayLeft

C300

D0

Attempts:

3 left

💡 Hint

Common Mistakes

Starting cursor at column 15 which is off screen for the message.

Using delay too short or too long for smooth scrolling.

Start cursor at column 0, use scrollDisplayLeft() to scroll left, and delay 300 milliseconds for visible movement.