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I took an ESP32 microcontroller and a RFID-RC522 reader, and wrote code to read a NFC tag that I place on the CD and make an API call to Spotify to play that album on the Echo Dot that I mounted into a Walnut and Birdseye Maple case that I built.
Making gesture-controlled robots using an accelerometer sensor like Adxl 335 is old tech. To control it require sensors and MCU and RF transmitter to be placed on the hand. On the other side, RF receiver MCU and other components are required.
In our project, I have used the android Accelerometer sensor to control the movements
The project will start, control, and protect a wood-fired boiler, modulating according to outdoor temperature. It will control a mini-split to provide heat or cooling. It also controls a window A/C. Statistics are rendered on Blynk graphs. Control via Blynk and Node-Red dashboard.
HexMatrix is the LED matrix having many triangular pixels. Six pixels combining makes a hexagon. There are many different animations that can be shown on the matrix form FastLED library, Also I have designed digits from 0 to 9 using 10 segments for each digit in the matrix and made a IOT clock.