Arduino Switch (case) Statement, used with serial input

Summary of Arduino Switch (case) Statement, used with serial input


The article explains using a switch statement in Arduino to control multiple LEDs based on serial input characters. Five LEDs are connected to digital pins 2 through 6, each through a 220-ohm resistor. When characters 'a' to 'e' are sent via the Serial Monitor, corresponding LEDs light up; other characters turn all LEDs off. This demonstrates how switch statements can streamline handling multiple discrete input options compared to multiple if statements.

Parts used in the Arduino Switch Statement LED Control Project:

  • Arduino Board
  • LEDs (5 units)
  • 220 ohm resistors (5 units)
  • Breadboard
  • Hook-up wire

An if statement allows you to choose between two discrete options, TRUE or FALSE. When there are more than two options, you can use multiple if statements, or you can use the switch statement. Switch allows you to choose between several discrete options.

Arduino Switch (case2) Statement

This guide demonstrates how to utilize a switch to activate one of multiple LEDs depending on a received byte of data through serial communication. The drawing pays attention to serial input and activates a separate LED for the letters a, b, c, d, or e.

Circuit

Five LEDs are attached to digital pins 2, 3, 4, 5, and 6 in series through 220 ohm resistors.

To make this sketch work, your Arduino must be connected to your computer. Open the Serial Monitor, and send the characters a, b, c, d, or e, or anything else.

image developed using Fritzing. For more circuit examples, see the Fritzing project page

Schematic:

Arduino Switch (case2) Statement schematic

Code

/*
Switch statement  with serial input

Demonstrates the use of a switch statement.  The switch
statement allows you to choose from among a set of discrete values
of a variable.  It’s like a series of if statements.

To see this sketch in action, open the Serial monitor and send any character.
The characters a, b, c, d, and e, will turn on LEDs.  Any other character will turn
the LEDs off.

Major Components in Project

Hardware Required

  • Arduino Board
  • (5) LEDs
  • (5) 220 ohm resistors
  • breadboard
  • hook-up wire

For more detail: Arduino Switch (case) Statement, used with serial input


About The Author

Ibrar Ayyub

I am an experienced technical writer holding a Master's degree in computer science from BZU Multan, Pakistan University. With a background spanning various industries, particularly in home automation and engineering, I have honed my skills in crafting clear and concise content. Proficient in leveraging infographics and diagrams, I strive to simplify complex concepts for readers. My strength lies in thorough research and presenting information in a structured and logical format.

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