Circuit Python Keyboard Driver for Adafruit KB2040 & NeoKey 1x4

code.py

# SPDX-FileCopyrightText: 2018 Kattni Rembor for Adafruit Industries
#
# SPDX-License-Identifier: MIT
# Modified by Mark Watson, 2025 (MIT license)

"""CircuitPython Essentials HID Keyboard example"""
import time

import board
import usb_hid

# Docs: https://docs.circuitpython.org/projects/hid/en/latest/api.html
# Library: https://learn.adafruit.com/circuitpython-essentials/circuitpython-hid-keyboard-and-mouse
from adafruit_hid.keyboard import Keyboard
from adafruit_hid.keyboard_layout_us import KeyboardLayoutUS
from adafruit_hid.keycode import Keycode

# Library: https://learn.adafruit.com/neokey-1x4-qt-i2c/python-circuitpython
from adafruit_neokey.neokey1x4 import NeoKey1x4

# use default I2C bus
i2c_bus = board.I2C()
neokey = NeoKey1x4(i2c_bus, addr=0x30)

# 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 :)

# Keymap (note the NeoKey1x4 has 4 keys
keymap = [
    # Send shortcuts unlikely to be used, then remap later
    [Keycode.COMMAND, Keycode.CONTROL, Keycode.OPTION, Keycode.F1],
    [Keycode.COMMAND, Keycode.CONTROL, Keycode.OPTION, Keycode.F2],
    [Keycode.COMMAND, Keycode.CONTROL, Keycode.OPTION, Keycode.F3],
    [Keycode.COMMAND, Keycode.CONTROL, Keycode.OPTION, Keycode.F4],
]
keys = len(keymap)

while True:
    for i in range(len(keymap)):
        if neokey[i]:
            keyboard.press(*keymap[i])
        else:
            keyboard.release(*keymap[i])

    time.sleep(0.01)