I purchased one of each of these cheap sensors recently from aliexpress for testing purposes. Compared with the ubiquitous HC-SR04 (*), I liked the idea of having a combined emitter/receiver, i.e.

This Arduino library provides a convenient and easy-to-use interface for the PH4502C sensor, allowing you to effortlessly integrate it into your Arduino projects. The PH4502C sensor is a ...

Abstract: The recent surge in the internet-of-things envisions the integration of trillions of sensors in various applications such as environmental monitoring. A myriad of parameters such as ...

Abstract: In a shopping mart, imagine ten people waiting in line. If the first five people have many items in their carts, the last person with only one or two items may wait a long time to pay. To ...