Summary of Arduino Keyboard Message Code
This project uses an Arduino Leonardo (or Micro/Due) to send a text string to a computer as keyboard input whenever a pushbutton is pressed. The string displays the number of times the button has been pressed. The button toggles the keyboard input to ensure the Arduino only takes over the keyboard after the button is pressed, avoiding loss of control over the computer. The circuit involves a pushbutton connected to pin 2 and a 10-kilohm resistor connected to pin 4.
Parts used in the Keyboard Button test:
- Arduino Leonardo, Micro, or Due board
- One momentary pushbutton
- One 10-kiloohm resistor
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.
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.
Software Required
- Any text editor
Schematic:
Code
/* Keyboard Button test For the Arduino Leonardo and Micro. 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 */
Major Components in Project
Hardware Required
- Arduino Leonardo, Micro, or Due board
- One momentary pushbutton
- One 10-kiloohm resistor
For more detail: Arduino Keyboard Message Code
