Arduino / Teensyduino code for a keyboard interface to toggle mute and camera controls in Google Meet

Arduino_physical_mute_key.ino

/*
 * A simple arduino app to send a keyboard combination (Command + F1) 
 * when a button is pushed. This key combination can, using an app like 
 * FastScripts (https://red-sweater.com/fastscripts/) or similar, 
 * trigger a script to perform a specific action, for example 
 * to mute the teleconferencing app of your choice.
 * 
 * Useful scripts for running at the desktop side: 
 * - Google Meet: https://github.com/aezell/mutemeet
 * - Zoom: https://gist.github.com/mgaruccio/15734cb2f1442c457f0fa25dd838cc6d
 * - Teams: https://gist.githubusercontent.com/rooreynolds/10f16deb16ef05a4ade1b9cd7351ba02/raw/3cbd645a9b7cba12142393aad835eba72d282f4e/MuteTeams.scpt
 */
 
 #include <Bounce.h>

int pin_black = 4;

Bounce blackButton = Bounce(pin_black, 100);  // 100 ms debounce

int cmdKey = KEY_LEFT_GUI; // for OSX. For Win/Linux, try KEY_LEFT_CTRL
int shiftKey = KEY_LEFT_SHIFT; 
int f1Key = KEY_F1; // 

void setup() { 
  Serial.begin(9600);
  pinMode(pin_black, INPUT_PULLUP);
  Serial.println("setup complete");
}

void pressCmdF1() {
  Keyboard.press(cmdKey);
  Keyboard.press(f1Key);
  delay(100);
  Keyboard.releaseAll();
}

void cmdPress(int key) {
  Keyboard.press(cmdKey);
  Keyboard.press(key);
  delay(100);
  Keyboard.releaseAll();
}

void shiftCmdPress(int key) {
  Keyboard.press(cmdKey);
  Keyboard.press(shiftKey);
  Keyboard.press(key);
  delay(100);
  Keyboard.releaseAll();
}

void loop() {
  if (blackButton.update()) {
    if (blackButton.fallingEdge()) {
        pressCmdF1(); 
    }
  }
}

MuteGoogleMeetInAllChromeTabs.scpt

-- from https://github.com/aezell/mutemeet/blob/master/MuteMeet.scpt
tell application "Google Chrome"
    activate
    set i to 0
    repeat with w in (windows) -- loop over each window
        set j to 1 -- tabs are not zeroeth
        repeat with t in (tabs of w) -- loop over each tab
            if title of t starts with "Meet " then
                set (active tab index of w) to j -- set Meet tab to active
                set index of w to 1 -- set window with Meet tab to active
                delay 0.5
                do shell script "open -a Google\\ Chrome" -- these two lines are hackery to actually activate the window
                tell application "System Events" to tell process "Google Chrome" to keystroke "d" using command down -- issue keyboard command
                return
            end if
            set j to j + 1
        end repeat
        set i to i + 1
    end repeat
end tell

MuteTeams.scpt

tell application "Microsoft Teams"
  activate
  tell application "System Events" to tell process "Microsoft Teams"
    keystroke "m" using {shift down, command down} -- shortcut keys: https://support.microsoft.com/en-us/office/keyboard-shortcuts-for-microsoft-teams-2e8e2a70-e8d8-4a19-949b-4c36dd5292d2
  end tell
end tell