Maker Nano RP2040 four keys keyboard

four_keys_keyboard.py

# Raspberry Pi Pico Keyboard Demo
# Using CircuitPython https://circuitpython.org/board/cytron_maker_nano_rp2040/
# Using Adafruit USB_HID Library https://circuitpython.org/libraries
# Based on DroneBot Workshop 2021 https://dronebotworkshop.com
# Modified by Panan for Demo at DIY keyboard project https://www.youtube.com/watch?v=iChTO2C1c9g&list=PL9K9tbjCONeziZt7By7gRklBIlKdFnC85

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

keyboard = Keyboard(usb_hid.devices)
keyboard_layout = KeyboardLayoutUS(keyboard) 

btn1 = digitalio.DigitalInOut(board.GP16)
btn1.direction = digitalio.Direction.INPUT
btn1.pull = digitalio.Pull.DOWN

btn2 = digitalio.DigitalInOut(board.GP19)
btn2.direction = digitalio.Direction.INPUT
btn2.pull = digitalio.Pull.DOWN

btn3 = digitalio.DigitalInOut(board.GP17)
btn3.direction = digitalio.Direction.INPUT
btn3.pull = digitalio.Pull.DOWN

btn4 = digitalio.DigitalInOut(board.GP9)
btn4.direction = digitalio.Direction.INPUT
btn4.pull = digitalio.Pull.DOWN

while True:
    if btn1.value:
        keyboard.press(Keycode.Q)
        time.sleep(0.1)
        keyboard.release(Keycode.Q)
    if btn2.value:
        keyboard.press(Keycode.W)
        time.sleep(0.1)
        keyboard.release(Keycode.W)
    if btn3.value:
        keyboard.press(Keycode.E)
        time.sleep(0.1)
        keyboard.release(Keycode.E)
    if btn4.value:
        keyboard.press(Keycode.R)
        time.sleep(0.1)
        keyboard.release(Keycode.R)
    time.sleep(0.1)