Here is a smart Android Things flower you can build that can detect and react to your smile or other actions. The Expression Flower is based on a Raspberry Pi. It has a camera mounted in the sensor to recognize your facial expressions using machine learning.
More gadgets like this: here
You are going to need a Raspberry Pi 3 Model B, 1m 144 LED strip, metal servo horn, power splitter, 5V 3A power supply, and a bunch of other simple components to pull it off.
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