QtPy Keyboard

code.py

import board
import neopixel
import touchio
from time import sleep
import usb_hid
from adafruit_hid.keyboard import Keyboard
from adafruit_hid.keycode import Keycode

# pin that the NeoPixel is connected to
PIXEL_PIN: Pin = board.NEOPIXEL

# the NeoPixel object
pixel: NeoPixel = neopixel.NeoPixel(PIXEL_PIN, 1)

# list of touch pads understood by touch(i)
touch_pads: list = [
    touchio.TouchIn(board.A0),
    touchio.TouchIn(board.TX),
    touchio.TouchIn(board.RX),
]

# the keyboard object
kbd: Kepboard = Keyboard(usb_hid.devices)


def light(r: int, g: int, b: int) -> None:
    """
    set the first neopixel to (r,g,b)

    makes the light display a color.
    colors are built by mixing red, green, and blue light
    each light can be specified in a range of 0 - 255

    for example:
      light(255, 255, 255) - is a bright white light
      light(255, 0, 0) - is a bright red light
      light(0, 50, 0) - is a dark green light
      light(0, 0, 0) - is off
    """
    pixel[0] = (r, g, b)


def touch(pin: int = None) -> bool:
    """
    return True if pin (or any pin if pin=None) is being touched

    when called without arguments as touch(), returns true
    if any touch pad is being touched.

    when called with an argument as touch(0), touch(1), or touch(2),
    returns true only if pad 0, 1, or 2 is being touched.

    return(boolean)
    """
    if pin is None:
        for pad in touch_pads:
            if pad.value:
                return True
        return False
    # coerce to a boolean
    return touch_pads[pin].value and True


# main loop
while True:
    # when the first pad is being touched
    if touch(0):
        # set a purple light and send a keyboard scancode for a capital A
        light(100, 0, 100)
        kbd.send(Keycode.SHIFT, Keycode.A)

        # spin while the button is held, then set the light to off
        while touch(0):
            pass
        light(0, 0, 0)
    # while the second pad is being touched
    elif touch(1):
        # set a red light and send a keyboard scancode for a lowecase X
        light(100, 0, 0)
        kbd.send(0, Keycode.X)

        # spin while the button is held, then set the light to off
        while touch(1):
            pass
        light(0, 0, 0)