DIY custom pedal keyboard

Imagine having one of those cool customizable keypad that do custom keyboard actions for vloggers like this But, paying $53 dollars is too much, as you can just make one of your own using USB-HID and a few lines of code! I'm using an ESP32-S3, a new ESP32 which can emulate USB devices. Note- Only the following boards/microcontrollers can use this code. BTW, if you don't have one, just buy an ESP32-S3 for 9 bucks

REQUIREMENTS

• A computer running MacOs, Windows or Linux
• 4 Dupont female to female wires
• 2 Push-buttons
• Any of the following boards listed below.

SETUP

For this project- we're gonna use CircuitPython-a programming language designed to simplify experimenting and learning to program on low-cost microcontroller boards using Python.The steps to use it are here .Y'all Might know python from my blogs, so you can check them out. Download the latest version of Python, type
python3--version && pip --version in the terminal or Command prompt after installing python, then download Git. Go to terminal or command prompt. Type
pip3 install --upgrade setuptools circup --break-system-packages && circup install asyncio usb_hid adafruit_hid, then press
Enter ↩, and you're ready! Please note that you have to connect a cable from the board's port or the USB port to your computer. If a new flash drive shows up, then you're good to go! If not, recheck the Circuitpython installation steps or change the cable with another 'Data' cable. Go to the online coding editor using Opera, Google Chrome or Microsoft Edge ONLY. The, click USB. Now, you can write the code.

USB-HID is the ability to emulate USB devices. The boards listed above are all compatible with USB HID. We will be using an official Adafruit Library- Adafruit_hid The documentation is easy-to-understand (take my word for it), if you want to explore other devices, read it. We're going to make a scroller. To make the scroller, we need a mouse.
import usb_hid
from adafruit_hid.mouse import Mouse
m = Mouse(usb_hid.devices)
is some simple boilerplate you have to use.
m.move(x=100,y=200,wheel=-20) moves the cursor to coordinates (x=100px, y=200px) and it makes scroll wheel move down by -20 units. m.click(Mouse.LEFT_BUTTON) clicks the left button and m.press(Mouse.RIGHT_BUTTON)
m.release_all() presses and releases the right-click button on a mouse. That's all! is the only schematic required for both projects. Here are the connections.

  import asyncio
  import board
  import digitalio
  import usb_hid
  from adafruit_hid.mouse import Mouse
  
  # Setup HID mouse
  mouse = Mouse(usb_hid.devices)
  
  # Set up pins 13 and 4 for scrolling
  lPedal = digitalio.DigitalInOut(board.IO13)
  #lPedal = digitalio.DigitalInOut(board.D13) on some boards
  rPedal = digitalio.DigitalInOut(board.IO4)
  #rPedal = digitalio.DigitalInOut(board.D4)  on some boards
  for i in (lPedal,rPedal):
      i.direction = digitalio.Direction.INPUT
      i.pull = digitalio.Pull.DOWN
  
  # Interval (in seconds) for reading the pins
  READ_INTERVAL = 0.1
  
  
  async def upHandler():
      while True:
          # If pin 13 is high, send scroll up
          if rPedal.value:
              # wheel parameter > 0 for scrolling up, adjust the value if needed.
              mouse.move(wheel=1)
              print("up")
          await asyncio.sleep(READ_INTERVAL)
  
  
  async def downHandler():
      while True:
          # If pin 14 is high, send scroll down
          if lPedal.value:
              # wheel parameter < 0 for scrolling down, adjust the value if needed.
              mouse.move(wheel=-1)
              print("down")
          await asyncio.sleep(READ_INTERVAL)
  
  #Main thing
  async def main():
      # Create asynchronous tasks for scrolling
      asyncio.create_task(upHandler())
      asyncio.create_task(downHandler())
      while True:
          await asyncio.sleep(1)
  # Start the asyncio event loop.
  asyncio.run(main())

I hope you liked this blog, also check out the code on Github. See you next time with more blogs!