ESP32 Starter Kit
7. Code Explanation
Read the distance after setting the trig pin and echo pin. The unit of displayed value is optional (cm or inch).
9.2.29 Project 26: Human Body Piano
1. Description
The analog piano includes a development board and an ultrasonic sensor. It enables to play different tones by detecting
the position of your fingers. Thus, this module is able to stimulate a piano to perform music and songs.
312 Chapter 9. Scratch Tutorial
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