Ultrasonic Sensor HY-SRF05 One Pin Mode

Measuring Distance with the Ultrasonic HY-SRF05 with only one Pin per Sensor.

Apr 4, 2021

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Devices & Components

Arduino Uno Rev3

HY-SRF05

Breadboard (generic)

Jumper wires (generic)

Project description

Code

Code to measure the distance

c_cpp

1const unsigned int TRIG_PIN=12;
2const unsigned int ECHO_PIN=12;
3const   unsigned int BAUD_RATE=9600;
4
5void loop () {}
6void setup() {
7
8 Serial.begin(BAUD_RATE);
9   pinMode(TRIG_PIN, OUTPUT);
10 digitalWrite(TRIG_PIN, LOW);
11 delayMicroseconds(2);
12   digitalWrite(TRIG_PIN, HIGH);
13 delayMicroseconds(10);
14 digitalWrite(TRIG_PIN,   LOW);
15 delayMicroseconds(2);
16
17pinMode(ECHO_PIN, INPUT);
18const unsigned   long duration= pulseIn(ECHO_PIN, HIGH);
19int distance= duration/29/2;
20
21if(duration==0){
22   Serial.println("Warning: no pulse from sensor");
23  } 
24 else{
25     Serial.print("Distance:   ");
26     Serial.print(distance);
27     Serial.print(" cm\
28");
29 }
30delay(100);
31}

const unsigned int TRIG_PIN=12;
const unsigned int ECHO_PIN=12;
const   unsigned int BAUD_RATE=9600;

void loop () {}
void setup() {

 Serial.begin(BAUD_RATE);
   pinMode(TRIG_PIN, OUTPUT);
 digitalWrite(TRIG_PIN, LOW);
 delayMicroseconds(2);
   digitalWrite(TRIG_PIN, HIGH);
 delayMicroseconds(10);
 digitalWrite(TRIG_PIN,   LOW);
 delayMicroseconds(2);

pinMode(ECHO_PIN, INPUT);
const unsigned   long duration= pulseIn(ECHO_PIN, HIGH);
int distance= duration/29/2;

if(duration==0){
   Serial.println("Warning: no pulse from sensor");
  } 
 else{
     Serial.print("Distance:   ");
     Serial.print(distance);
     Serial.print(" cm\
");
 }
delay(100);
}

Code to measure the distance

c_cpp

1const unsigned int TRIG_PIN=12;
2const unsigned int ECHO_PIN=12;
3const  unsigned int BAUD_RATE=9600;
4
5void loop () {}
6void setup() {
7
8 Serial.begin(BAUD_RATE);
9  pinMode(TRIG_PIN, OUTPUT);
10 digitalWrite(TRIG_PIN, LOW);
11 delayMicroseconds(2);
12  digitalWrite(TRIG_PIN, HIGH);
13 delayMicroseconds(10);
14 digitalWrite(TRIG_PIN,  LOW);
15 delayMicroseconds(2);
16
17pinMode(ECHO_PIN, INPUT);
18const unsigned  long duration= pulseIn(ECHO_PIN, HIGH);
19int distance= duration/29/2;
20
21if(duration==0){
22  Serial.println("Warning: no pulse from sensor");
23  } 
24 else{
25     Serial.print("Distance:  ");
26     Serial.print(distance);
27     Serial.print(" cm\
28");
29 }
30delay(100);
31}

const unsigned int TRIG_PIN=12;
const unsigned int ECHO_PIN=12;
const  unsigned int BAUD_RATE=9600;

void loop () {}
void setup() {

 Serial.begin(BAUD_RATE);
  pinMode(TRIG_PIN, OUTPUT);
 digitalWrite(TRIG_PIN, LOW);
 delayMicroseconds(2);
  digitalWrite(TRIG_PIN, HIGH);
 delayMicroseconds(10);
 digitalWrite(TRIG_PIN,  LOW);
 delayMicroseconds(2);

pinMode(ECHO_PIN, INPUT);
const unsigned  long duration= pulseIn(ECHO_PIN, HIGH);
int distance= duration/29/2;

if(duration==0){
  Serial.println("Warning: no pulse from sensor");
  } 
 else{
     Serial.print("Distance:  ");
     Serial.print(distance);
     Serial.print(" cm\
");
 }
delay(100);
}

Code to keep track of the area

c_cpp

1const unsigned int TRIG_PIN=12;
2const unsigned int ECHO_PIN=12;
3const  unsigned int BAUD_RATE=9600;
4
5void setup() {}
6void loop () {
7  
8  Serial.begin(BAUD_RATE);
9  pinMode(TRIG_PIN, OUTPUT);
10  digitalWrite(TRIG_PIN,  LOW);
11  delayMicroseconds(2);
12  digitalWrite(TRIG_PIN, HIGH);
13  delayMicroseconds(10);
14  digitalWrite(TRIG_PIN, LOW);
15  
16  delayMicroseconds(2);
17
18pinMode(ECHO_PIN,  INPUT);
19 const unsigned long duration= pulseIn(ECHO_PIN, HIGH);
20 int distance=  duration/29/2;
21 if(duration==0){
22   Serial.println("Warning: no pulse from  sensor");
23   } 
24 if(distance <50){
25   Serial.println("Warning: Somebody  has breached the bunker!");
26    }
27  else{
28      Serial.print("You are  safe. For now...\
29");
30      }
31 delay(2000);
32 }

const unsigned int TRIG_PIN=12;
const unsigned int ECHO_PIN=12;
const  unsigned int BAUD_RATE=9600;

void setup() {}
void loop () {
  
  Serial.begin(BAUD_RATE);
  pinMode(TRIG_PIN, OUTPUT);
  digitalWrite(TRIG_PIN,  LOW);
  delayMicroseconds(2);
  digitalWrite(TRIG_PIN, HIGH);
  delayMicroseconds(10);
  digitalWrite(TRIG_PIN, LOW);
  
  delayMicroseconds(2);

pinMode(ECHO_PIN,  INPUT);
 const unsigned long duration= pulseIn(ECHO_PIN, HIGH);
 int distance=  duration/29/2;
 if(duration==0){
   Serial.println("Warning: no pulse from  sensor");
   } 
 if(distance <50){
   Serial.println("Warning: Somebody  has breached the bunker!");
    }
  else{
      Serial.print("You are  safe. For now...\
");
      }
 delay(2000);
 }

Downloadable files

Single Pin Wiring

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