Theoretical Paper
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Practical Paper
Industrial Training
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 −
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1 × Arduino Leonardo, Micro, or Due board
Procedure
Just connect your board to the computer using USB cable.
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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.
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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.
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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.