To use with CircuitPython, you need to first install a few libraries, into the lib folder on your CIRCUITPY drive. Then you need to update code.py with the example script.
Thankfully, we can do this in one go. In the example below, click the Download Project Bundle button below to download the necessary libraries and the code.py file in a zip file. Extract the contents of the zip file, open the directory NeoTrinkey_Zoom_Shortcuts/ and then click on the directory that matches the version of CircuitPython you're using and copy the contents of that directory to your CIRCUITPY drive.
Your CIRCUITPY drive should now look similar to the following image:
# SPDX-FileCopyrightText: 2021 Liz Clark for Adafruit Industries
#
# SPDX-License-Identifier: MIT
import time
import board
import neopixel
import touchio
import usb_hid
from rainbowio import colorwheel
from adafruit_hid.keyboard import Keyboard
from adafruit_hid.keyboard_layout_us import KeyboardLayoutUS
from adafruit_hid.keycode import Keycode
# setup for onboard neopixels
pixel_pin = board.NEOPIXEL
num_pixels = 4
pixels = neopixel.NeoPixel(pixel_pin, num_pixels, brightness=0.05, auto_write=False)
# setup for cap touch pads
top_touch = touchio.TouchIn(board.TOUCH1)
bot_touch = touchio.TouchIn(board.TOUCH2)
# HID keyboard input setup
keyboard = Keyboard(usb_hid.devices)
keyboard_layout = KeyboardLayoutUS(keyboard)
# variable for the ALT key
alt_key = Keycode.ALT
def rainbow_cycle(wait):
for j in range(255):
for i in range(num_pixels):
rc_index = (i * 256 // num_pixels) + j
pixels[i] = colorwheel(rc_index & 255)
pixels.show()
time.sleep(wait)
# variables for colors
RED = (255, 0, 0)
GREEN = (0, 255, 0)
# state machines
# cap touch debouncing
bot_pressed = False
top_pressed = False
# default mute states
mic_mute = True
vid_mute = True
# time.monotonic() tracker
clock = time.monotonic()
# tracking for initiating an exit from the meeting
escape = False
escape_1 = False
escape_2 = False
while True:
# cap touch debouncing
if not top_touch.value and top_pressed:
top_pressed = False
if not bot_touch.value and bot_pressed:
bot_pressed = False
# if your mic is muted...
if mic_mute:
# neopixels are red
pixels[0] = RED
pixels[1] = RED
pixels.show()
# if your camera is muted...
if vid_mute:
# neopixels are red
pixels[2] = RED
pixels[3] = RED
pixels.show()
# if your mic is NOT muted...
if not mic_mute:
# neopixels are green
pixels[0] = GREEN
pixels[1] = GREEN
pixels.show()
# if your camera is NOT muted...
if not vid_mute:
# neopixels are green
pixels[2] = GREEN
pixels[3] = GREEN
pixels.show()
# if you are leaving the meeting...
if escape:
# neopixels are rainbow
rainbow_cycle(0)
# resets exit states
escape = False
escape_1 = False
escape_2 = False
mic_mute = True
vid_mute = True
# if you press the top touch cap touch pad...
if (top_touch.value and not top_pressed):
top_pressed = True
# start time count for exit
clock = time.monotonic()
# slight delay so that you don't automatically mute/unmute
# if your intent is to exit
time.sleep(0.12)
# if after the delay you're still pressing the cap touch pad...
if top_touch.value and top_pressed:
print("escape top")
# initial escape state is set to true
escape_1 = True
# if you aren't still pressing the cap touch pad...
else:
# if your camera was muted...
if vid_mute:
print("top")
# your camera is NOT muted
vid_mute = False
# resets escape state just in case
escape_1 = False
# if your camera was NOT muted...
elif not vid_mute:
print("top")
# your camera is muted
vid_mute = True
# resets escape state just in case
escape_1 = False
# sends camera mute/unmute shortcut
keyboard.send(alt_key, Keycode.V)
# if you press the top touch cap touch pad...
if (bot_touch.value and not bot_pressed):
bot_pressed = True
# start time count for exit
clock = time.monotonic()
# slight delay so that you don't automatically mute/unmute
# if your intent is to exit
time.sleep(0.12)
# if after the delay you're still pressing the cap touch pad...
if bot_touch.value and bot_pressed:
print("escape bot")
# initial escape state is set to true
escape_2 = True
# if you aren't still pressing the cap touch pad...
else:
# if your mic was muted...
if mic_mute:
print("bot")
# your mic is NOT muted
mic_mute = False
# resets escape state just in case
escape_2 = False
# if your mic was NOT muted...
elif not mic_mute:
print("bot")
# your mic is muted
mic_mute = True
# resets escape state just in case
escape_2 = False
# sends mic mute/unmute shortcut
keyboard.send(alt_key, Keycode.A)
# if you held down both cap touch pads and 2 seconds has passed...
if ((clock + 2) < time.monotonic()) and (escape_1 and escape_2):
print("escape")
# full escape state is set
escape = True
# sends exit meeting shortcut
keyboard.send(alt_key, Keycode.Q)
# brief delay for confirmation window to open
time.sleep(0.1)
# sends enter to confirm meeting exit
keyboard.send(Keycode.ENTER)
Page last edited January 20, 2025
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