There is no need to use interrupts.ĭetecting a change of the button is in this example : Īlthough I don't like that example, it show that the previous state of the button has to be remembered to detect a change. When you want to transfer a mechanical button to the Keyboard object, then detect when the button is pressed and call Keyboard.press() and detect when the button is released for Keyboard.release(). Often a delay of 100ms between them is okay.Ĭalling Keyboard.press() over and over again while a button is pressed it not okay. The example here is to make a Google Bike. The button is released with Keyboard.release(). Emulating a USB Keyboard with Arduino Leonardo Make a Google Bike (G Payne 2016) The Arduino Leonardo is unique because it has a USB interface that allows you to send USB keyboard keystrokes and mouse movements to your computer. As soon as Keyboard.press() is called, the computer thinks that the button is kept pressing down. The Leonardo uses a micro USB-B but just make sure the cable supports data transfer, some cheaper ones might only support power. Connnecting Very simply you connect your Arduino Leonardo (or HID supporting Arduino) over a USB. The computer will take care of the autorepeat while the button is pressed.Ĭall each of them just once. A computer mouse, a keyboard and an Xbox remote are all HIDs and you can emulate them using an Arduino as a HID. When you want more control, or more keys pressed at the same time, then you can use the Keyboard.press() and Keyboard.release(). Pressing a single button is done with Keyboard.write(), or Keyboard.print().
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