Interfacing ultrasonic sensor with Arduino

This is a basic tutorial on how to interface ultrasonic sensor (HCSR04) with Arduino uno. So let's start !!!

Jun 4, 2021

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home automation

internet of things

robots

Components and supplies

Arduino UNO

Ultrasonic Sensor - HC-SR04 (Generic)

Jumper wires (generic)

Apps and platforms

Arduino IDE

Project description

Code

c_cpp

This is code for the interfacing ultrasonic sensor with Arduino uno.

1// Interfacing Ultrasonic sensor with Arduino uno
2
3
4#define echoPin  12 //connect echo pin of ultrasonic sensor to D12 of Arduino
5#define trigPin  10 //connect trigger pin of ultrasonic sensor to D10 of Arduino
6
7long duration;  // declare variables to hold duration and distance
8int distance;
9
10void  setup() //setup() is used for initialization
11
12{
13  Serial.begin(9600);  //set  the baud rate of serial communication to 9600
14  pinMode(trigPin,OUTPUT); //set  trigPin as output pin of Arduino
15  pinMode(echoPin,INPUT);  //set echoPin as  output pin of Arduino
16 }
17void loop(){
18  digitalWrite(trigPin,LOW); //generate  square wave at trigger pin
19  delayMicroseconds(2);
20  digitalWrite(trigPin,HIGH);
21  delayMicroseconds(10);
22  digitalWrite(trigPin,LOW);
23  
24 duration=pulseIn(echoPin,HIGH);//calculation  of distance of obstacle
25  distance=(duration*0.034/2);
26  Serial.print("Distance  : ");
27  Serial.print(distance);
28  Serial.println(" cm ");
29  delay(1000);
30               
31}
32

// Interfacing Ultrasonic sensor with Arduino uno


#define echoPin  12 //connect echo pin of ultrasonic sensor to D12 of Arduino
#define trigPin  10 //connect trigger pin of ultrasonic sensor to D10 of Arduino

long duration;  // declare variables to hold duration and distance
int distance;

void  setup() //setup() is used for initialization

{
  Serial.begin(9600);  //set  the baud rate of serial communication to 9600
  pinMode(trigPin,OUTPUT); //set  trigPin as output pin of Arduino
  pinMode(echoPin,INPUT);  //set echoPin as  output pin of Arduino
 }
void loop(){
  digitalWrite(trigPin,LOW); //generate  square wave at trigger pin
  delayMicroseconds(2);
  digitalWrite(trigPin,HIGH);
  delayMicroseconds(10);
  digitalWrite(trigPin,LOW);
  
 duration=pulseIn(echoPin,HIGH);//calculation  of distance of obstacle
  distance=(duration*0.034/2);
  Serial.print("Distance  : ");
  Serial.print(distance);
  Serial.println(" cm ");
  delay(1000);
               
}

Code

c_cpp

This is code for the interfacing ultrasonic sensor with Arduino uno.

1// Interfacing Ultrasonic sensor with Arduino uno
2
3
4#define echoPin
5  12 //connect echo pin of ultrasonic sensor to D12 of Arduino
6#define trigPin
7  10 //connect trigger pin of ultrasonic sensor to D10 of Arduino
8
9long duration;
10  // declare variables to hold duration and distance
11int distance;
12
13void
14  setup() //setup() is used for initialization
15
16{
17  Serial.begin(9600);  //set
18  the baud rate of serial communication to 9600
19  pinMode(trigPin,OUTPUT); //set
20  trigPin as output pin of Arduino
21  pinMode(echoPin,INPUT);  //set echoPin as
22  output pin of Arduino
23 }
24void loop(){
25  digitalWrite(trigPin,LOW); //generate
26  square wave at trigger pin
27  delayMicroseconds(2);
28  digitalWrite(trigPin,HIGH);
29
30  delayMicroseconds(10);
31  digitalWrite(trigPin,LOW);
32  
33 duration=pulseIn(echoPin,HIGH);//calculation
34  of distance of obstacle
35  distance=(duration*0.034/2);
36  Serial.print("Distance
37  : ");
38  Serial.print(distance);
39  Serial.println(" cm ");
40  delay(1000);
41
42               
43}
44

// Interfacing Ultrasonic sensor with Arduino uno


#define echoPin
  12 //connect echo pin of ultrasonic sensor to D12 of Arduino
#define trigPin
  10 //connect trigger pin of ultrasonic sensor to D10 of Arduino

long duration;
  // declare variables to hold duration and distance
int distance;

void
  setup() //setup() is used for initialization

{
  Serial.begin(9600);  //set
  the baud rate of serial communication to 9600
  pinMode(trigPin,OUTPUT); //set
  trigPin as output pin of Arduino
  pinMode(echoPin,INPUT);  //set echoPin as
  output pin of Arduino
 }
void loop(){
  digitalWrite(trigPin,LOW); //generate
  square wave at trigger pin
  delayMicroseconds(2);
  digitalWrite(trigPin,HIGH);

  delayMicroseconds(10);
  digitalWrite(trigPin,LOW);
  
 duration=pulseIn(echoPin,HIGH);//calculation
  of distance of obstacle
  distance=(duration*0.034/2);
  Serial.print("Distance
  : ");
  Serial.print(distance);
  Serial.println(" cm ");
  delay(1000);

               
}

Downloadable files

Circuit digram

This is the circuit diagram for interfacing ultrasonic sensor and Arduino uno made by using the software tinkercad.

Circuit digram

Ultrasonic sensor with arduino

Circuit digram

This is the circuit diagram for interfacing ultrasonic sensor and Arduino uno made by using the software tinkercad.

Circuit digram

Comments

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smithgl

2 years ago

Change the vcc to 5 volts

sushildamle

3 years ago

Excellent project. Successfully i could do it. Many thanks. I tried to do with three USS HC-SR04 having 4 pins each connected so as to measure distance on three sides at the same time. First two shows the distance but the last one shows 0.00. please suggest remedy. Thanking you all in advance.

user1891676

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