Ultrasonic sensor not detecting any values when using Arduino and LabVIEW

Question

I have connected the circuit as shown.

The circuit works perfectly when I Use the Arduino ide. When I use LabVIEW, the distance from the ultrasonic sensor is always zero.

The LabVIEW circuit diagram is shown.

The Arduino ide code is shown below.

        int thresh_=10;
        int pin=10;
        int dist_=0;
        #define echoPin 2
        #define trigPin 3
        
        long duration;
        int distance;
        
        void setup() {
            
           pinMode(trigPin, OUTPUT); // Sets the trigPin as an OUTPUT
           pinMode(echoPin, INPUT);
           
           Serial.begin(9600);
           pinMode(pin,OUTPUT);
           
        }
        
        void loop() {
          digitalWrite(trigPin, LOW);
          delayMicroseconds(2);
          // Sets the trigPin HIGH (ACTIVE) for 10 microseconds
          digitalWrite(trigPin, HIGH);
          delayMicroseconds(10);
          digitalWrite(trigPin, LOW);
          // Reads the echoPin, returns the sound wave travel time in microseconds
          duration = pulseIn(echoPin, HIGH);
          // Calculating the distance
          distance = duration * 0.034 / 2;
        
          
            Serial.println(distance);
           if (distance<=20){
            digitalWrite(pin,HIGH);}
           else{
             digitalWrite(pin,LOW);}
        }

What could be the issue?

The result from the serial port is written to the ultrasonic sensor. The loop rate is there to show us how the program runs and does not affect the running of the program. The program runs with no error. The LED gets turned on indicating the distance value gotten from the ultrasonic sensor is always zero which cannot be true. — Alex Mwaura, May 21 '21 at 10:33
I am not aware of the internal workings of the Arduino and LabVIEW. Am not sure I fully understand your question. — Alex Mwaura, May 21 '21 at 11:08
I might have misunderstood the setup. Ignore my comments above. Consider adding more details to the question though. — AJN, May 21 '21 at 11:09

score 0 · Accepted Answer · answered May 27 '21 at 06:12

The linx Ultrasonic sensor found in Labview 2020 has an issue and does not work. I double clicked it to open it’s front panel. From there I opened its block diagram window and double clicked on the digital Read pulse width to open it’s front panel. From there I opened its block diagram window and set the stimulus pulse to a constant active high.

Ultrasonic sensor not detecting any values when using Arduino and LabVIEW

1 Answers1