code.py

# Imports
import board
import digitalio
import usb_hid
from adafruit_hid.keyboard import Keyboard
from adafruit_hid.keycode import Keycode
import time

# Configuration
WINDOWS = True  # Set to True for Windows, False for MacOS (default on startup)
LEDS = True  # Set to True to enable LEDs, False to disable

CMD = Keycode.CONTROL  # Default to CONTROL for Windows
if not WINDOWS:
    CMD = Keycode.COMMAND # Use COMMAND for MacOS

# Constants
DEBOUNCE_TIME = 0.1  # Debounce time set at this number of seconds
STARTUP_BLINK_TIME = 0.2  # The LEDs blink at start up for this number of seconds
OS_SWITCH_BLINK_TIME = 0.15  # LED blink speed when switching OS mode

# Setting up the buttons
# Button 1 (Hand) on GPIO14
button1 = digitalio.DigitalInOut(board.GP14)
button1.direction = digitalio.Direction.INPUT
button1.pull = digitalio.Pull.UP  # Pull Ups as button connects to GND when pressed

# Button 2 (Camera) on GPIO26
button2 = digitalio.DigitalInOut(board.GP26)
button2.direction = digitalio.Direction.INPUT
button2.pull = digitalio.Pull.UP  

# Button 3 (Microphone) on GPIO28
button3 = digitalio.DigitalInOut(board.GP28)
button3.direction = digitalio.Direction.INPUT
button3.pull = digitalio.Pull.UP  

# Button 4 (End call) on GPIO8
button4 = digitalio.DigitalInOut(board.GP8)
button4.direction = digitalio.Direction.INPUT
button4.pull = digitalio.Pull.UP  

if LEDS:
    # Setting up the LEDs
    # Button 1 (Hand) LED - LED1 on GPIO15
    led1 = digitalio.DigitalInOut(board.GP15)
    led1.direction = digitalio.Direction.OUTPUT
    led1.value = False  # Sets the LED to off 

    # Button 2 (Camera) LED - LED2 on GPIO27
    led2 = digitalio.DigitalInOut(board.GP27)
    led2.direction = digitalio.Direction.OUTPUT
    led2.value = False  # Sets the LED to off

    # Button 3's LED - LED3 on GPIO29
    led3 = digitalio.DigitalInOut(board.GP29)
    led3.direction = digitalio.Direction.OUTPUT
    led3.value = False  # Sets the LED to off

    # Button 4's LED - LED4 on GPIO7
    led4 = digitalio.DigitalInOut(board.GP7)
    led4.direction = digitalio.Direction.OUTPUT
    led4.value = False  # Sets the LED to off

    # This makes the LEDs blink at start up
    for _ in range(3):
        led1.value = True
        led2.value = True
        led3.value = True
        led4.value = True
        time.sleep(STARTUP_BLINK_TIME)
        led1.value = False
        led2.value = False
        led3.value = False 
        led4.value = False
        time.sleep(STARTUP_BLINK_TIME)

# Set up the keyboard
keyboard = Keyboard(usb_hid.devices)



while True:
    # Button 1 + Button 4: Switch to Windows mode
    if button1.value is False and button4.value is False:
        if not WINDOWS:
            WINDOWS = True
            CMD = Keycode.CONTROL
            print("Switched to Windows mode")
        if LEDS:
            for _ in range(2):
                led1.value = True
                led2.value = True
                led3.value = True
                led4.value = True
                time.sleep(OS_SWITCH_BLINK_TIME)
                led1.value = False
                led2.value = False
                led3.value = False
                led4.value = False
                time.sleep(OS_SWITCH_BLINK_TIME)
        time.sleep(DEBOUNCE_TIME)
        while button1.value is False or button4.value is False:
            time.sleep(0.01)

    # Button 2 + Button 3: Switch to MacOS mode
    if button2.value is False and button3.value is False:
        if WINDOWS:
            WINDOWS = False
            CMD = Keycode.COMMAND
            print("Switched to MacOS mode")
        if LEDS:
            led1.value = True
            led2.value = True
            led3.value = True
            led4.value = True
            time.sleep(OS_SWITCH_BLINK_TIME)
            led1.value = False
            led2.value = False
            led3.value = False
            led4.value = False
            time.sleep(OS_SWITCH_BLINK_TIME)
        time.sleep(DEBOUNCE_TIME)
        while button2.value is False or button3.value is False:
            time.sleep(0.01)

    if button1.value is False:  # Button pressed (active low)
        if LEDS:
            led1.value = not led1.value  # This toggles the LED on / off
        keyboard.press(CMD, Keycode.SHIFT, Keycode.K) # Mimics pressing CTRL+SHIFT+K
        print("Raise / Lower Hand button pressed")
        time.sleep(DEBOUNCE_TIME)  # Debounce
        keyboard.release_all()  # Release all keys
        while button1.value is False:
            time.sleep(0.01)

    if button2.value is False:  # Button pressed (active low)
        if LEDS:
            led2.value = not led2.value  # This toggles the LED on / off
        keyboard.press(CMD, Keycode.SHIFT, Keycode.O) # Mimics pressing CTRL+SHIFT+O
        print("Camera on/off button pressed")
        time.sleep(DEBOUNCE_TIME)  # Debounce
        keyboard.release_all()  # Release all keys
        while button2.value is False:
            time.sleep(0.01)

    if button3.value is False:  # Button pressed (active low)
        if LEDS:
            led3.value = not led3.value  # This toggles the LED on / off
        keyboard.press(CMD, Keycode.SHIFT, Keycode.M) # Mimics pressing CTRL+SHIFT+M
        print("Mute / Unmute button pressed")
        time.sleep(DEBOUNCE_TIME)  # Debounce
        keyboard.release_all()  # Release all keys
        while button3.value is False:
            time.sleep(0.01)

    if button4.value is False:  # Button pressed (active low)
        if LEDS:
            led4.value = not led4.value  # This toggles the LED on / off
        keyboard.press(CMD, Keycode.SHIFT, Keycode.H) # Mimics pressing CTRL+SHIFT+H
        print("End call button pressed")
        time.sleep(DEBOUNCE_TIME)  # Debounce
        keyboard.release_all()  # Release all keys
        while button4.value is False:
            time.sleep(0.01)

    time.sleep(0.01)  # Delay