Controlling Gravity (Gesture Recognition Module)
Testing out this DFRobot gesture recognition module...
https://www.dfrobot.com/product-2914.html
Compared to the gravity voice recognition module, this one appears simpler.
But, same warnings about interface apply (Beware 5V!)
https://forums.parallax.com/discussion/178105
This one uses a lot less power, only ~100mA at 3.3V as recall.
Think this one will be useful pointed backwards from robot, so can control with hand gestures.
Or, maybe just have robot stop of person not detected...

Comments
Shows up as expected on I2C scanner.
The github archive for this one looks similar to voice, so hopefully can get it going soon.
https://github.com/DFRobot/DFRobot_GestureFaceDetection/tree/master
But, just like voice, can interact without MCU. It's fun. Just can't control anything without MCU connected...