HC-SR04 Ultrasonic Distance Sensor Module

The HC-SR04 Ultrasonic Sensor Module consists of an ultrasonic transmitter and receiver pair operating at 40 kHz. The module measures distance by transmitting ultrasonic pulses and calculating the time taken for the echo to return after reflecting from an object. It provides accurate, reliable, and cost-effective distance measurement for Arduino, ESP32, Raspberry Pi, STM32, and other microcontroller platforms.The module requires only four connections (VCC, Trig, Echo, and GND) and is commonly used in robotics, parking systems, smart vehicles, water level monitoring, and object detection projects.