Default value for maximum measurement distance is 4m, since HC-SR04 sensor can't measure reliably beyond that. However, if you are using another sensor or if you you don't care about distances larger ...

Arduino/ESP8266/ESP32 library for HC-SR04 ultrasonic distance sensor. This library is used for measuring distance with the HC-SR04, which is an ultrasonic sensor that measures distances from 2 to ...

Human activity recognition is an important problem in health care, ambient-assisted living, surveillance-based security, etc. and has crucial applications in smart environment. A non-invasive, ...

Ultrasonic fingerprint sensors are taking smartphone security to the next level, offering reliable and fast unlocking even in less-than-ideal conditions. If you’re interested in experiencing ...

The internet of things makes everyday tasks simpler and more convenient. Using ultrasonic glasses, we come up with a clever solution to this problem that we provide here. Additionally, the glasses are ...