I love these little circuit boards. They are cheap and light. I ran the mandatory flashing from the Arduino IDE to test this. Set the board to "LOLIN (WEMOS) D1 R2 & mini" and you're done. The video shows that it really works. Someone mentioned that the picture was blown up so I took some photos with a tape measure. Then I realized that the board is smaller than the roulette wheel. That's one of the good things about them. They can be glued almost anywhere. This will most likely end up in a lightbulb to be controlled by an ESPHome, or as a climate sensor somewhere in the house.
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