Pin configuration of grove ultrasonic ranger with particle Shield


#1

Hi Everyone,

I have a grove starter kit and i try to using Ultrasonic ranger. I don’t find informations for using argon/xenon/boron with grove starter kit, specially of how initialise the correct PIN.

I use the D2 connector on my grove shield for particle. here is the (simple code):

#include "Ultrasonic.h"

Ultrasonic ultrasonic(2);

void setup()
{

}


void loop() 
{
    
get_ultrasonic_value();

}

void get_ultrasonic_value() {

long RangeInCentimeters;

RangeInCentimeters = ultrasonic.MeasureInCentimeters(); // two measurements should keep an interval


delay(250);

Particle.publish("ultrasonic",String(RangeInCentimeters));

}

For now, i only have a “0” value.

Pierrick


#2

One thing I can say for sure it that you should not use 2 for the pin designation but go with the actual pin label D2.
If D2 happens to line up with the anonymous pin number 2 (as does on Gen1 & 2 devices) that’s not always guaranteed and hence should not be counted on.

Also which of the Ultrasonic libraries are you using?


#3

Hi @ScruffR, thanks for your help.

i use :

GROVE-ULTRASONIC-RANGER v 1.0.1

Available on libraries. I tried with “D2” but still nothing else than “0”.


#4

I am not sure how this grove ultrasonic ranger works. The HC-SR04 uses 2 pins, first the ping or trigger and second a receiver pin whereas this just has one pin. Try printing out to serial like the example below.

> #include "Ultrasonic.h"
> long RangeInInches;
> long RangeInCentimeters;
> 
> Ultrasonic ultrasonic(D7);
> 
> void setup()
> {
>     Serial.begin(9600);
> }
> 
> void loop()
> {
>      Serial.println("The distance to obstacles in front is: ");
>     RangeInInches = ultrasonic.MeasureInInches();
>     Serial.print(RangeInInches);//0~157 inches
>     Serial.println(" inch");
>     delay(250);
> 
>     RangeInCentimeters = ultrasonic.MeasureInCentimeters(); // two measurements should keep an interval
>     Serial.print(RangeInCentimeters);//0~400cm
>     Serial.println(" cm");
>     delay(250); 
> }