Teams PTT BTTN - The BLE push-to-talk button for Microsoft Teams

Using the device

• Flash the latest firmware to your device. Power it up.
• The device acts now as a bluetooth keyboard with just one button. The device advertises itself as "Teams PTT BTTN", manufacturer is "TB Devices", battery ist always 100 % :-).
• Connect your device running Microsoft teams with this keyboard.
• With the meeting window focused and muted, press the button of your device to talk.
• How does it work? The device just sends the key combination "Ctrl + Space" when you press it's button and releases it when you release the button.

Builds for different platforms

M5 Atom (Lite)

• Use build "m5stack-atom".
• Button and LED is on board, no need to connect anything external.

M5 Stamp PICO

• Use build "m5stack-stamp".
• Connect button between G19 and GND
• Connect LED between G25 and GND using a 200R resistor
• Power with 5V and GND

Other platforms

The should work on every ESP32 just add your own board definition to "platformio.ini"

Update firmware

• Press button five times in fast sequence.
• Device spins up it's own WiFi access point with the name "Teams PTT BTTN". Connect to it using password "12345678".
• Onboard RGB LED (if the board has one) lights up blue.
• When connected, open the URL http://192.168.4.1
• Upload the new firmware .bin file. Device reboots. Done.

Libraries used

This project uses the following libraries from different authors:

• EasyButton by evert-arias
• ESP32-BLE-Keyboard by T-vK
• NimBLE-Arduino by h2zero
• SmartLeds by roboticsbrno

Thanks to all the authors.

Licence

All code is licensed under the MPLv2 License.