CircuitPython code for sending USB media controls with a foot pedal

pedal_media_control.py

import board  # Lists the pin names for the board we're using
from time import sleep

# Set up the USB Human Interface Device (HID) libraries
import usb_hid
from adafruit_hid.consumer_control import ConsumerControl
from adafruit_hid.consumer_control_code import ConsumerControlCode
consumer_control = ConsumerControl(usb_hid.devices)

# Set up the analog input pin to read the pedal state
from analogio import AnalogIn
pedal = AnalogIn(board.A7)

# Loop forever, reading the pedal value
while True:
    # The pedal value will be between ~35,000 (unpressed) and ~10,000 (fully pressed)
    if pedal.value < 15000:
        # We detected the pedal was pressed, so send the Play/Pause command over USB:
        consumer_control.send(ConsumerControlCode.PLAY_PAUSE)
        # Stop reading for a second to prevent double-presses:
        sleep(1)