The NED Button

import time

import board
import digitalio
import usb_hid
from adafruit_hid.keyboard import Keyboard
from adafruit_hid.keyboard_layout_us import KeyboardLayoutUS
from adafruit_hid.keycode import Keycode

# A simple neat keyboard demo in CircuitPython

# The pins we'll use, each will have an internal pullup
keypress_pins = [board.A1, board.A2]
# Our array of key objects
key_pin_array = []
# The Keycode sent for each button, will be paired with a control key
keys_pressed = [Keycode.A, "https://www.youtube.com/watch?v=g_vZasFzMN4\n"]
control_key = Keycode.SHIFT

# The keyboard object!
time.sleep(1) # Sleep for a bit to avoid a race condition on some systems
keyboard = Keyboard(usb_hid.devices)
keyboard_layout = KeyboardLayoutUS(keyboard) # We're in the US :)

# Make all pin objects inputs with pullups
for pin in keypress_pins:
key_pin = digitalio.DigitalInOut(pin)
key_pin.direction = digitalio.Direction.INPUT
key_pin.pull = digitalio.Pull.UP
key_pin_array.append(key_pin)

# For most CircuitPython boards:
led = digitalio.DigitalInOut(board.LED)
# For QT Py M0:
# led = digitalio.DigitalInOut(board.SCK)
led.direction = digitalio.Direction.OUTPUT

print("Waiting for key pin...")

while True:
# Check each pin
for key_pin in key_pin_array:
if not key_pin.value: # Is it grounded?
i = key_pin_array.index(key_pin)
print("Pin #%d is grounded." % i)

# Turn on the red LED
led.value = True

while not key_pin.value:


pass # Wait for it to be ungrounded!
# "Type" the Keycode or string
key = keys_pressed[i] # Get the corresponding Keycode or string

if isinstance(key, str): # If it's a string...
keyboard_layout.write(key) # ...Print the string

else: # If it's not a string...
keyboard.press(control_key, key) # "Press"...
keyboard.release_all() # ..."Release"!

# Turn off the red LED
led.value = False

time.sleep(0.01)