Attach one end of the pushbutton to pin 4 on the Arduino. Attach the other end to power. Use the resistor as a pull-down, providing a reference to ground, by attaching it from pin 4 to ground.

Once you've programmed your board, unplug the USB cable and open a text editor. Connect the board to your computer and press the button to write in the document.

• Arduino Leonardo, Micro, or Due board

(:div class=code :)

(:source http://github.com/arduino/Arduino/raw/master/build/shared/examples/09.USB/Keyboard/KeyboardMessage/KeyboardMessage.ino lang=arduino tabwidth=4:)

 (:div class=code :)

(:source http://github.com/arduino/Arduino/raw/master/build/shared/examples/09.USB/KeyboardMessage/KeyboardMessage.ino lang=arduino tabwidth=4:)

When the button is pressed in this example, a text string is sent to the computer as keyboard input. The string reports the number of times the button has been pressed. Once you have the Leonardo programmed and wired up, open up your favourite text editor to see the results.

• Arduino Leonardo or Arduino Due board

 * pushbutton attached from pin 2 to +5V on AVR boards
   and to +3.3V to the Arduino Due
 * 10-kilohm resistor attached from pin 2 to ground

const int buttonPin = 2; // input pin for pushbutton

const int buttonPin = 4; // input pin for pushbutton

(:source lang=arduino tabwidth=4:) /*

 Keyboard Button test

 Sends a text string when a button is pressed.

 The circuit:
 * pushbutton attached from pin 2 to +5V
 * 10-kilohm resistor attached from pin 4 to ground

 created 24 Oct 2011
 modified 27 Mar 2012
 by Tom Igoe

 This example code is in the public domain.

 http://www.arduino.cc/en/Tutorial/KeyboardButton
 */

const int buttonPin = 2; // input pin for pushbutton int previousButtonState = HIGH; // for checking the state of a pushButton int counter = 0; // button push counter

void setup() {

  // make the pushButton pin an input:
  pinMode(buttonPin, INPUT);
  // initialize control over the keyboard:
  Keyboard.begin();

}

void loop() {

  // read the pushbutton:
  int buttonState = digitalRead(buttonPin);
  // if the button state has changed, 
  if ((buttonState != previousButtonState) 
    // and it's currently pressed:
  && (buttonState == HIGH)) {
    // increment the button counter
    counter++;
    // type out a message
    Keyboard.print("You pressed the button ");
    Keyboard.print(counter); 
    Keyboard.println(" times.");
  }
  // save the current button state for comparison next time:
  previousButtonState = buttonState; 

}

(:sourceend:)

(:source http://github.com/arduino/Arduino/raw/master/build/shared/examples/09.USB(Leonardo)/Keyboard/KeyboardMessage/KeyboardMessage.ino lang=arduino tabwidth=4:)

NB: When you use the Keyboard.print() command, the Arduino takes over your computer's keyboard! To insure you don't lose control of your computer while running a sketch with this function, make sure to set up a reliable control system before you call Keyboard.print(). This sketch includes a pushbutton to toggle the keyboard, so that it only runs after the button is pressed.

(:source http://github.com/arduino/Arduino/raw/master/build/shared/examples/09.Keyboard/KeyboardMessage/KeyboardMessage.ino lang=arduino tabwidth=4:)

(:include LeonardoSeeAlsoInclude:)

Circuit\\

(:sourceend:)

Attach one end of the pushbutton to pin 4 on the Leonardo. Attach the other end it +5V. Use the resistor as a pull-down, providing a reference to ground, by attaching it from pin 4 to ground.

Once you've programmed your Leonardo, unplug the USB cable and open a text editor. Connect your Leonardo board to your computer and press the button to write in the document.

click the images to enlarge

 Attach one end of the pushbutton to pin 4 on the Leonardo. Attach the other end it +5V. Use the resistor as a pull-down, providing a reference to ground, by attaching it from pin 4 to ground.

Once you've programmed your Leonardo, unplug the USB cable and open a text editor. Connect your Leonardo board to your computer and press the button to write in the document.

\\

See Also

• Keyboard.write()
• Keyboard.print()
• Keyboard.println()

NB: When you use the Keybaord.print() command, the Arduino takes over your computer's keyboard! To insure you don't lose control of your computer while running a sketch with this function, make sure to set up a reliable control system before you call Keyboard.print(). This sketch includes a pushbutton to toggle the keyboard, so that it only runs after a button is depressed.

NB: When you use the Keybaord.print() command, the Arduino takes over your computer's keyboard! To insure you don't lose control of your computer while running a sketch with this function, make sure to set up a reliable control system before you call Keyboard.move(). This sketch includes a pushbutton to toggle the keyboard, so that it only runs after a button is depressed.

(:source http://github.com/arduino/Arduino/raw/master/build/shared/examples/9.Keyboard/KeyboardMessage/KeyboardMessage.ino lang=arduino tabwidth=4:)

(:source http://github.com/arduino/Arduino/raw/master/libraries/Keyboard/examples/KeyboardMessage/KeyboardMessage.ino lang=arduino tabwidth=4:)

(:source http://github.com/arduino/Arduino/raw/master/libraries/Keyboard/Examples/KeyboardMessage/KeyboardMessage.ino lang=arduino tabwidth=4:)

(:div class=circuit:)

click the images to enlarge

Attach:KeyboardMessage_bb.png Δ Δ image developed using Fritzing. For more circuit examples, see the Fritzing project page

(:divend:)

Examples > Keyboard Library

Keyboard Message

When the button is pressed in this example, a text string is sent to the computer as keyboard input. The string reports the number of times the button has been pressed. Once you have the Leonardo programmed and wired up, open up your favorite text editor to see the results.

(:div class=BOM :) Hardware Required

• Arduino Leonardo board
• One momentary pushbutton
• One 10-kiloohm resistor

Software Required

• Any text editor

(:divend:)

Circuit Connect your Leonardo board to your computer with a micro-USB cable. Attach one end of the pushbutton to pin 4 on the Leonardo. Attach the other end it +5V. Use the resistor as a pull-down, providing a reference to ground, by attaching it from pin 4 to ground.

Code

(:div class=code :) (:source http://github.com/arduino/Arduino/raw/master/libraries/Keyboard/KeyboardMessage/KeyboardMessage.ino lang=arduino tabwidth=4:) (:divend:)

\\