Arduino Function: Keyboard.releaseAll

Description

This function lets go of all keys currently pressed. 
See Keyboard.press() for additional information.

Syntax

Keyboard.releaseAll()

Returns

int the number of keys released

Examples

// use this option for OSX:
char ctrlKey = KEY_LEFT_GUI;
// use this option for Windows and Linux:
// char ctrlKey = KEY_LEFT_CTRL;

void setup() {
// make pin 2 an input and turn on the
// pullup resistor so it goes high unless
// connected to ground:
pinMode(2, INPUT_PULLUP);
// initialize control over the keyboard:
Keyboard.begin();
}

void loop() {
while (digitalRead(2) == HIGH) {
// do nothing until pin 2 goes low
delay(500);
}
delay(1000);
// new document:
Keyboard.press(ctrlKey);
Keyboard.press('n');
delay(100);
Keyboard.releaseAll();
// wait for new window to open:
delay(1000);
}


Based on the reference originally written by Arduino Community,  wiring.org.co and  arduino.cc