code for (hc-sr04) ultrasonic sensor to get possible accurate distance

Using Arduino Programming Questions
1

The code I'm using has a limitation of printing only 5 cm for distance, I can't still find the solution for it. Please guide me :slight_smile: Thank you

C O D E

#include "NewPing.h"

#define TRIGGER_PIN 4
#define ECHO_PIN 3
#define MAX_DISTANCE 400

NewPing sonar(TRIGGER_PIN,ECHO_PIN,MAX_DISTANCE);

void setup() {
Serial.begin (9600);
pinMode(TRIGGER_PIN, OUTPUT);
pinMode(ECHO_PIN, INPUT);
}

void loop()
{
digitalWrite(TRIGGER_PIN, LOW);
delayMicroseconds(2);
digitalWrite(TRIGGER_PIN, HIGH);
delayMicroseconds(10);
digitalWrite(TRIGGER_PIN, LOW);
long duration,distance;
duration= pulseIn(ECHO_PIN,HIGH);
distance = duration/58.2;
Serial.print(distance);
Serial.println(" cm");
delay(50);
}

ULTRASONIC.txt (608 Bytes)

2

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biancadelos:
The code I'm using has a limitation of printing only 5 cm for distance

It's not clear what you mean by that. Are you saying that it always shows the distance as 5, no matter what the distance actually is?

3

when I used a tape measure cm, it only print an output that is limited to 5cm even it is 1cm NEAR to sensor.

4

Why have you included the NewPing library and then not used it but read the sensor manually? Seems rather odd.

Steve

5

I don't know how to use it pls change my code :slight_smile: thanks sir

6

NewPing wiki for information on the use of the library.

7

NewPing comes with several useful example sketches. In this case all you need is in the NewPingExample sketch.

Steve