How to Use Sonar Powered Ultrasonic Sensor Module HC SR04 with Arduino

This tutorial is about how to use Ultrasonic Sensor HC-SR04 with Arduino UNO, The Ultrasonic HC-SR04 sensor uses SONAR to determine the distance to an obstacle or an object like Bats, an excellent digital non-contact range detection with high accuracy and stable reading. From 2 centimeter to 400 centimeter. The operation is not affected by any light or a colored objects it has a sharp rangefinder although acoustically soft material like cloth can be difficult to detect. it has a complete sonar powered Ultrasonic Transmitter and Receiver Module, Tested in Arduino, Raspberry Pi and Common Micro Controller.

Features

• Power Supply :+5V DC
• Quiescent Current : <2mA
• Working Current: 15mA
• Effectual Angle: <15°
• Measuring Angle: 30 degree
• Trigger Input Pulse width: 10uS
• Dimension: 45mm x 20mm x 15mm
• Ranging Distance : 2cm – 400 cm/1″ – 13ft
• Resolution : 0.3 cm

Connecting to Arduino Board

Source Code

int trigPin = 10;    //Trig 
int echoPin = 11;    //Echo 

long duration, cm, inches;
 
void setup() {
  
  Serial.begin (9600); //Serial Port begin
  
  pinMode(trigPin, OUTPUT); //Define outputs
  pinMode(echoPin, INPUT); //Define inputs
}
 
void loop()

{
 
 
  // The sensor will going to triggered by a HIGH pulse of 10 or more microseconds.
  // Provide a short LOW pulse beforehand to ensure a clean HIGH pulse:

  digitalWrite(trigPin, LOW);
  delayMicroseconds(5);
  digitalWrite(trigPin, HIGH);
  delayMicroseconds(10);
  digitalWrite(trigPin, LOW);
 
  // Read the signal from the sensor a HIGH pulse
  // The duration time in microseconds from the broadcast
  // of the ping to the reception of its echo off of an obstacle.

  pinMode(echoPin, INPUT);
  duration = pulseIn(echoPin, HIGH);
 
  // converting the time into a distance

  cm = (duration/2) / 29.1;
  inches = (duration/2) / 74; 
  
  Serial.print(inches);
  Serial.print("in, ");
  Serial.print(cm);
  Serial.print("cm");
  Serial.println();
  
  delay(250);
}

int trigPin = 10; //Trig

int echoPin = 11; //Echo

long duration, cm, inches;

void setup() {

Serial.begin (9600); //Serial Port begin

pinMode(trigPin, OUTPUT); //Define outputs

pinMode(echoPin, INPUT); //Define inputs

}

void loop()

{

// The sensor will going to triggered by a HIGH pulse of 10 or more microseconds.

// Provide a short LOW pulse beforehand to ensure a clean HIGH pulse:

digitalWrite(trigPin, LOW);

delayMicroseconds(5);

digitalWrite(trigPin, HIGH);

delayMicroseconds(10);

digitalWrite(trigPin, LOW);

// Read the signal from the sensor a HIGH pulse

// The duration time in microseconds from the broadcast

// of the ping to the reception of its echo off of an obstacle.

pinMode(echoPin, INPUT);

duration = pulseIn(echoPin, HIGH);

// converting the time into a distance

cm = (duration/2) / 29.1;

inches = (duration/2) / 74;

Serial.print(inches);

Serial.print("in, ");

Serial.print(cm);

Serial.print("cm");

Serial.println();

delay(250);

}

Using the Arduino Libary New Ping

/*
 * Posted on http://randomnerdtutorials.com
 * created by http://playground.arduino.cc/Code/NewPing
*/

#include <NewPing.h>
 
#define TRIGGER_PIN 12
#define ECHO_PIN 11
#define MAX_DISTANCE 200
 
NewPing sonar(TRIGGER_PIN, ECHO_PIN, MAX_DISTANCE); // NewPing setup of pins and maximum distance.
 
void setup() {
   Serial.begin(9600);
}
 
void loop() {
   delay(50);
   unsigned int uS = sonar.ping_cm();
   Serial.print(uS);
   Serial.println(“cm”);
}

* Posted on http://randomnerdtutorials.com

* created by http://playground.arduino.cc/Code/NewPing

#include <NewPing.h>

#define TRIGGER_PIN 12

#define ECHO_PIN 11

#define MAX_DISTANCE 200

NewPing sonar(TRIGGER_PIN, ECHO_PIN, MAX_DISTANCE); // NewPing setup of pins and maximum distance.

void setup() {

Serial.begin(9600);

}

void loop() {

delay(50);

unsigned int uS = sonar.ping_cm();

Serial.print(uS);

Serial.println(“cm”);

}

How to Use Sonar Powered Ultrasonic Sensor Module HC SR04 with Arduino

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