Project Overview
This project uses the HC-SR04 Ultrasonic Distance Sensor to measure the distance of an object and display that reading on a 20×4 LCD I2C screen.
Ultrasonic Sensor
How to Use Ultrasonic Sensor with NodeMCU ESP8266 ESP12E
Dolphins and bats navigate the world using ultrasounds, which are sounds with frequencies above the range of human hearing. In this tutorial, you will learn how to use ultrasounds to make exciting STEM projects.