DIY USB Keyboard Mouse Using Maker Pi Pico

code.py

'''
References:
- CircuitPython HID Keyboard and Mouse
  https://learn.adafruit.com/circuitpython-essentials/circuitpython-hid-keyboard-and-mouse

CircuitPython libraries bundle: https://circuitpython.org/libraries

Additional libraries:
- adafruit_hid

Last Modified
- 6 July 2021
'''

import time
import analogio
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
from adafruit_hid.mouse import Mouse

x_axis = analogio.AnalogIn(board.A1)
y_axis = analogio.AnalogIn(board.A0)

control_key = Keycode.SHIFT

# Sleep for a bit to avoid a race condition on some systems
time.sleep(1)

mouse = Mouse(usb_hid.devices)

keyboard = Keyboard(usb_hid.devices)
keyboard_layout = KeyboardLayoutUS(keyboard)  # We're in the US :)

pot_min = 0.8
pot_max = 2.5
step = (pot_max - pot_min) / 20.0

def get_voltage(pin):
    return (pin.value * 3.3) / 65536

def steps(axis):
    """ Maps the potentiometer voltage range to 0-20 """
    result = round((axis - pot_min) / step)
    if result > 8 and result < 12:
        result = 10
    return result

buttons_pressed = False

while True:
    x = get_voltage(x_axis)
    y = get_voltage(y_axis)

    if x > 3.0:
        mouse.click(Mouse.LEFT_BUTTON)
        time.sleep(0.2)  # Debounce delay

    #print(steps(x), steps(y))
    #time.sleep(0.1)

    if steps(x) == 10 and steps(y) == 10:
        if buttons_pressed == True:
            buttons_pressed = False
            keyboard.release_all()
            mouse.release_all()
    else:
        if buttons_pressed == False:
            buttons_pressed = True
            keyboard.press(control_key)
            time.sleep(0.1)
            mouse.press(Mouse.MIDDLE_BUTTON)

        if steps(x) > 11.0:
            #print(steps(x))
            mouse.move(x=1)
        if steps(x) < 9.0:
            #print(steps(x))
            mouse.move(x=-1)

        if steps(x) > 19.0:
            #print(steps(x))
            mouse.move(x=2)
        if steps(x) < 1.0:
            #print(steps(x))
            mouse.move(x=-2)

        if steps(y) > 11.0:
            #print(steps(y))
            mouse.move(y=-1)
        if steps(y) < 9.0:
            #print(steps(y))
            mouse.move(y=1)

        if steps(y) > 19.0:
            #print(steps(y))
            mouse.move(y=-2)
        if steps(y) < 1.0:
            #print(steps(y))
            mouse.move(y=2)