Why ultrasonic sensor just output 0 in Arduino?

Question

I have developed a code to get distance using an Ultrasonic Sensor. But it doesn't seem to work. It just output 0. Here's the code.

`#include <math.h>

void setup() {

Serial.begin(9600);

}

void loop() {

int dist = getcm();

delay(100);

Serial.println(dist);

}

int getcm() {

digitalWrite(A0, LOW);

delayMicroseconds(2);

digitalWrite(A0, HIGH);

delayMicroseconds(10);

digitalWrite(A0, LOW);

int duration = pulseIn(A1, HIGH);

int distance = (duration*.0343)/2;

distance = round(distance);

return distance;

}`

Is anything wrong with the code? Or the problem is with the sensor?

you don't set pinMode

Juraj
– Juraj

2022-09-12 07:17:48 +00:00
Commented Sep 12, 2022 at 7:17 — Juraj
– Juraj, Commented Sep 12, 2022 at 7:17
Thanks. I just set the pinMode and now it is working fine.

Sithum Harshana
– Sithum Harshana

2022-09-13 13:32:48 +00:00
Commented Sep 13, 2022 at 13:32 — Sithum Harshana
– Sithum Harshana, Commented Sep 13, 2022 at 13:32

Windfish · Accepted Answer · 2022-09-12 09:10:40Z

0

I do not know how the interface on these sensors work but, there are easier ways to do this like using the NewPing.h library.

#include <NewPing.h>
NewPing sonar (10, 11, 20);

void setup() {
Serial.beign(9600);
delay(50);
}

void loop() {
Serial.print("The Distance is:");
Serial.println(sonar.ping_cm());
delay(1000);
}

This should work. So, try this way and if it won't work still, it is probably a faulty sensor.

answered Sep 12, 2022 at 9:10

Windfish

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