Datasheet

CircuitPython HID Keyboard

One of the things we baked into CircuitPython is 'HID' control - Keyboard and Mouse capabilities. This means a Circuit

Playground Express can act like a keyboard device and press keys, or a mouse and have it move the mouse around

and press buttons. This is really handy because even if you cannot adapt your software to work with hardware, there's

almost always a keyboard interface - so if you want to have a capacitive touch interface for a game, say, then keyboard

emulation can often get you going really fast!

You'll need to install the driver bundle which comes with Keyboard, Keycode and Mouse support (https://adafru.it/Bf2)

Then try running this example code which will set the Circuit Playground Express Button_A and Button_B as HID

keyboard "keys".

# CircuitPlaygroundExpress_HIDKeyboard

import time

import board

from adafruit_hid.keyboard import Keyboard

from adafruit_hid.keyboard_layout_us import KeyboardLayoutUS

from adafruit_hid.keycode import Keycode

from digitalio import DigitalInOut, Direction, Pull

# A simple neat keyboard demo in circuitpython

# The button pins we'll use, each will have an internal pulldown

buttonpins = [board.BUTTON_A, board.BUTTON_B]

# our array of button objects

buttons = []

# The keycode sent for each button, will be paired with a control key

buttonkeys = [Keycode.A, "Hello World!\n"]

controlkey = Keycode.SHIFT

# the keyboard object!

# sleep for a bit to avoid a race condition on some systems

time.sleep(1)

kbd = Keyboard()

# we're americans :)

layout = KeyboardLayoutUS(kbd)