HC-SR04 Ranging always return 0

Using Arduino Sensors
1

Hello, I'm trying to use Ultrasonic Ranging Module HC-SR04 with a Arduino UNO, I downloaded the library from ITed and tested with the following code:

#include "Ultrasonic.h"

Ultrasonic ultrasonic(12,13);

void setup() {
Serial.begin(9600);
}

void loop()
{
  
  Serial.println(ultrasonic.Ranging(CM));
  Serial.println("cm");
    delay(100);
}

My cables are connected this way:
GND -> GND (Power)
ECHO -> 13 (Digital)
TRIG -> 12 (Digital)
VCC -> 5V (Power)

The problem is that it always print 0, either there is a object next to it or nothing. What can I do?
Thanks in advance

2

Does this work?

/*
 * HCSR04Ultrasonic/examples/UltrasonicDemo/UltrasonicDemo.pde
 *
 * SVN Keywords
 * ----------------------------------
 * $Author: cnobile $
 * $Date: 2011-09-17 02:43:12 -0400 (Sat, 17 Sep 2011) $
 * $Revision: 29 $
 * ----------------------------------
 */


#include <Ultrasonic.h>


#define TRIGGER_PIN  12
#define ECHO_PIN     13


Ultrasonic ultrasonic(TRIGGER_PIN, ECHO_PIN);


void setup()
  {
  Serial.begin(9600);
  }


void loop()
  {
  float cmMsec, inMsec;
  long microsec = ultrasonic.timing();


  cmMsec = ultrasonic.convert(microsec, Ultrasonic::CM);
  inMsec = ultrasonic.convert(microsec, Ultrasonic::IN);
  Serial.print("MS: ");
  Serial.print(microsec);
  Serial.print(", CM: ");
  Serial.print(cmMsec);
  Serial.print(", IN: ");
  Serial.println(inMsec);
  delay(1000);
  }
3

After downloading the library created by cnobile the code runs, but only prints 0:

MS: 0, CM: 0.00, IN: 0.00

@edit
I noticied that when I disconnect and connect again the echo pin in runtime sometimes it returns a value (but a very high value), but I tried to change the echo cable and the same problem continues

4

What is the voltage measured from +5 to GND at the sensor?
Show us a good picture of the wiring.

5

the solution to the sensor being stuck at zero is in this link. its the 2. post, by docdoc. You will need the NewPing library which is far better.

A working code:

#include <NewPing.h>

#define TRIGGER_PIN 12

#define ECHO_PIN 11

#define MAX_DISTANCE 200

NewPing sonar(TRIGGER_PIN, ECHO_PIN, MAX_DISTANCE);

void setup() {

Serial.begin(9600);

}

void loop() {

delay(50);

unsigned int uS = sonar.ping();

pinMode(ECHO_PIN,OUTPUT);

digitalWrite(ECHO_PIN,LOW);

pinMode(ECHO_PIN,INPUT);

Serial.print("Ping: ");

Serial.print(uS / US_ROUNDTRIP_CM);

Serial.println("cm");

}

link: http://forum.arduino.cc/index.php?topic=55119.15

NewPing link: Arduino Playground - NewPing Library

6

mzbas:
the solution to the sensor being stuck at zero is in this link. its the 2. post, by docdoc. You will need the NewPing library which is far better.

A working code:

...................................../quote]
@mzbas, how about posting your code between code tags in future?

I've just seen two posts by you in a row in which you posted this code inline without code tags.
Not good. :frowning:

Did you happen to notice that everyone else in this thread took the trouble to do it properly?