![Arduino Tutorial](/arduino/images/arduino-mini-logo.jpg)
- Arduino Tutorial
- Arduino - Home
- Arduino - Overview
- Arduino - Board Description
- Arduino - Installation
- Arduino - Program Structure
- Arduino - Data Types
- Arduino - Variables & Constants
- Arduino - Operators
- Arduino - Control Statements
- Arduino - Loops
- Arduino - Functions
- Arduino - Strings
- Arduino - String Object
- Arduino - Time
- Arduino - Arrays
- Arduino Function Libraries
- Arduino - I/O Functions
- Arduino - Advanced I/O Function
- Arduino - Character Functions
- Arduino - Math Library
- Arduino - Trigonometric Functions
- Arduino Advanced
- Arduino - Due & Zero
- Arduino - Pulse Width Modulation
- Arduino - Random Numbers
- Arduino - Interrupts
- Arduino - Communication
- Arduino - Inter Integrated Circuit
- Arduino - Serial Peripheral Interface
- Arduino Projects
- Arduino - Blinking LED
- Arduino - Fading LED
- Arduino - Reading Analog Voltage
- Arduino - LED Bar Graph
- Arduino - Keyboard Logout
- Arduino - Keyboard Message
- Arduino - Mouse Button Control
- Arduino - Keyboard Serial
- Arduino Sensors
- Arduino - Humidity Sensor
- Arduino - Temperature Sensor
- Arduino - Water Detector / Sensor
- Arduino - PIR Sensor
- Arduino - Ultrasonic Sensor
- Arduino - Connecting Switch
- Motor Control
- Arduino - DC Motor
- Arduino - Servo Motor
- Arduino - Stepper Motor
- Arduino And Sound
- Arduino - Tone Library
- Arduino - Wireless Communication
- Arduino - Network Communication
- Arduino Useful Resources
- Arduino - Quick Guide
- Arduino - Useful Resources
- Arduino - Discussion
Arduino - Keyboard Serial
This example listens for a byte coming from the serial port. When received, the board sends a keystroke back to the computer. The sent keystroke is one higher than what is received, so if you send an "a" from the serial monitor, you will receive a "b" from the board connected to the computer. A "1" will return a "2" and so on.
Warning − When you use the Keyboard.print() command, the Leonardo, Micro or Due board takes over your computer's keyboard. To ensure you do not lose control of your computer while running a sketch with this function, set up a reliable control system before you call Keyboard.print(). This sketch is designed to only send a Keyboard command after the board has received a byte over the serial port.
Components Required
You will need the following components −
- 1 × Arduino Leonardo, Micro, or Due board
Procedure
Just connect your board to the computer using USB cable.
![Keyboard Serial Breadboard](/arduino/images/keyboard_serial_breadboard.jpg)
Sketch
Open the Arduino IDE software on your computer. Coding in the Arduino language will control your circuit. Open a new sketch File by clicking New.
![Sketch](/arduino/images/sketch.jpg)
Notes − You must include the keypad library in your Arduino library file. Copy and paste the keypad library file inside the file with the name ‘libraries’ highlighted with yellow color.
![Arduino library file](/arduino/images/arduino_library_file.jpg)
Arduino Code
/* Keyboard test For the Arduino Leonardo, Micro or Due Reads a byte from the serial port, sends a keystroke back. The sent keystroke is one higher than what's received, e.g. if you send a, you get b, send A you get B, and so forth. The circuit: * none */ #include "Keyboard.h" void setup() { // open the serial port: Serial.begin(9600); // initialize control over the keyboard: Keyboard.begin(); } void loop() { // check for incoming serial data: if (Serial.available() > 0) { // read incoming serial data: char inChar = Serial.read(); // Type the next ASCII value from what you received: Keyboard.write(inChar + 1); } }
Code to Note
Once programed, open your serial monitor and send a byte. The board will reply with a keystroke, that is one number higher.
Result
The board will reply with a keystroke that is one number higher on Arduino IDE serial monitor when you send a byte.