Build an easy-to-reach pushbutton to mute/unmute yourself while on a Microsoft Teams call! Because 2020.

This project uses an Adafruit Circuit Playground Express (CPX) and a large pushbutton to create a mute button for Microsoft Teams via the hot key command "Ctrl + Shift + m".

• Skill level: Beginner
• Estimated Build Time: 5 - 10 min
• Estimated Cost: $30

• Adafruit Circuit Playground Express and microUSB cable
• 2 alligator clips
• 1 "Big Dome" pushbutton

• Arduino IDE (or VS Code w/ Arduino extension)

1. Connect the bottom pushbutton terminal to CPX pin A1.

2. Connect the bottom side pushbutton terminal to CPX 3.3V pin.

3. Plug in the microUSB cable between the CPX and your computer.

4. Optional: Build a simple case for your button.

   I used a sturdy cardboard box for this -- cut a hole in the top, secure the button, and adhere the CPX to the front for easy access!

That's it!

1. Download this repo, or copy and paste the code in "TeamsMuteButton" folder called "TeamsMuteButton.ino".

2. Open the Arduino IDE (download for free here) and open (or paste) the "TeamsMuteButton.ino" file.

3. Open the Boards Manager (under Tools --> Board) and install the Arduino SAMD Boards.

4. Once the boards are installed, suggested to restart Arduino IDE. Then go back to Tools--> Boards and select "Adafruit Circuit Playground Express" from the "Arduino SAMD (32-Bits ARM Cortex-M0+) Boards" option.

5. Select the port your CPX is connected to (under Tools --> Port).

6. Upload the code to the CPX (click the arrow key on the shortcut menu).

7. When the code is finished uploading, check that the program works by moving the slide switch to the left (towards CPX Button A) and pressing the pushbutton.

   You should see the red LED on the CPX turn on, and the command should open the Arduino Serial Monitor.

8. Once it's working as expected, you're ready to deploy! Use the slide switch to enable/disable the button.

Note: The pushbutton triggers the keyboard "CTRL + Shift + M" keys, which does different things in different apps. The mute function will only work if you're actively using Teams.

1. Check the alligator clip connections between the pushbutton and CPX.
   • Ensure you're using the proper Pushbutton leads
   • Check that you're connected to CPX pin A1.
2. Use the Serial Monitor to check the CPX slide switch status. When it is enabled, it will print "Ready to mute!" to the Serial Monitor.
3. Use the Serial Monitor to check if the pushbutton is getting triggered. When it is pressed and read by the CPX, it will print "Pressed" to the Serial Monitor.
4. Questions or other problems? Please open an issue or reach out to us: [email protected]

• This is simple prototype designed to help you get a mute button up and running as fast as possible. Want a more permanent solution? Awesome! Here are some tips:

  1. Replace the CPX with a smaller and more robust M0 board, like the Arduinno Nano 33 IoT.

     Note: You will need to change the wiring and add a resistor. Here's a helpful overview.

  2. Solder wires between the pushbutton and microcontroller, and/or coat in hot glue or epoxy.

  3. Build an enclosure for the pushbutton and microcontroller, or adhere to the side of your desk.

• Use the Microsoft Teams API mute call to write a more complex program that can mute/unmute Teams even if you aren't actively using it!

Happy Making!

This project welcomes contributions and suggestions. Most contributions require you to agree to a Contributor License Agreement (CLA) declaring that you have the right to, and actually do, grant us the rights to use your contribution. For details, visit https://cla.opensource.microsoft.com.

When you submit a pull request, a CLA bot will automatically determine whether you need to provide a CLA and decorate the PR appropriately (e.g., status check, comment). Simply follow the instructions provided by the bot. You will only need to do this once across all repos using our CLA.

This project has adopted the Microsoft Open Source Code of Conduct. For more information see the Code of Conduct FAQ or contact [email protected] with any additional questions or comments.

This project may contain trademarks or logos for projects, products, or services. Authorized use of Microsoft trademarks or logos is subject to and must follow Microsoft's Trademark & Brand Guidelines. Use of Microsoft trademarks or logos in modified versions of this project must not cause confusion or imply Microsoft sponsorship. Any use of third-party trademarks or logos are subject to those third-party's policies.