It's amazing what you can do with an ESP32 (or two).
The system relies on a compact Tof Sensor that continuously measures the height of the sand using an 8×8 matrix consisting of ...
If you use the Arduino IDE to program the ESP32, you might be interested in [Andreas Spiess’] latest video (see below). In it, he shows an example of using all three ESP32 UARTs from an Arduino ...