If you want to play with radar — and who could blame you — you can pretty easily get your hands on something like the automotive radar sensors used for collision avoidance and lane detection. But the ...

EchoAlert is a simple Arduino project that detects nearby objects using an ultrasonic sensor and provides feedback through a buzzer. The system measures distance using the HC-SR04 ultrasonic sensor.

This repository contains a library that can be used with Arduino and ESP32. It supports asyncron and synchron readout of HC-SR04 sensors also supporting multiple sensors using the same trigger. In ...