Arduino HC-SR04 Distance Sensor Driver Implementation

HC-SR04 Ultrasonic Sensor and Arduino

The HC-SR04 Ultrasonic Sensor is a very affordable proximity/distance sensor that has been used mainly for object avoidance in various Arduino robotics projects.  It provides 2cm to 400cm of non-contact measurement functionality with a ranging accuracy that can reach up to 3mm. Each HC-SR04 module includes an ultrasonic transmitter, a receiver and a control circuit.

In case we want to change our sensor in the future for a different one we will use programming interfaces.  The interface is a description of the actions that an object can do… for example when you flip a light switch, the light goes on, you don’t care how, just that it does. In Object Oriented Programming, an Interface is a description of all functions that an object must have in order to be an “X”. Again, as an example, anything that “ACTS LIKE” a light, should have a turn_on() method and a turn_off() method. The purpose of interfaces is to allow the computer to enforce these properties and to know that an object of TYPE T (whatever the interface is ) must have functions called X,Y,Z, etc.

How to connect Distance Sensor to Arduino Uno?


Arduino – HC-SR04 Implementation

Example Arduino code


You can find source files and examples in this Github repo: