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Detailed Product Description:

The HC-SR04 Ultrasonic Sensor Module is a widely used and cost-effective distance measuring sensor that works by emitting ultrasonic waves and measuring the time taken for the echo to return. It is ideal for a wide variety of applications including robot navigation, object detection, level sensing, and home automation systems.

This module can accurately measure distances from 2 cm to 400 cm with a precision of ±3 mm, making it suitable for Arduino, Raspberry Pi, ESP32, and other microcontroller-based projects.

It features four pins (VCC, Trig, Echo, GND) for simple interfacing and uses digital I/O for distance calculations, making it extremely easy to integrate into your systems.

Key Features:

• Ultrasonic distance sensor with 2 cm to 400 cm range

• High accuracy and fast response time

• Compatible with Arduino, Raspberry Pi, ESP8266, STM32

• Low-cost and easy to use

• Ideal for robotics, obstacle detection, and automation

• Non-contact measurement technology

Technical Specifications:

How to Use:

Basic Arduino Interfacing Steps:

1. Connect VCC → 5V, GND → GND, Trig → D9, Echo → D10 (example).

2. In code, send a 10µs pulse to Trig.

3. Measure the duration of the pulse on Echo.

4. Convert time to distance:
   Distance (cm) = duration / 58.0

Arduino Sample Code:

Applications:

• Obstacle avoidance for robotics

• Automatic door and home automation

• Parking sensors and reverse alerts

• Water level measurement

• Smart bins and distance counters

Package Includes:

• 1 × HC-SR04 Ultrasonic Range Finder Module