Grove Ultrasonic Ranger

Using ultrasonic grove sensor from Seedstudio to detect obstacle or measure range.

Specification

Parameter	Value/Range
Operating voltage	3.3~5V
Operating current	15mA
Ultrasonic frequency	42kHz
Measuring range	3-400cm
Resolution	1cm
Output	PWM

Wiring

Sketch

Download and move this library to the Arduino library folder.
For more info how to install this library see the Getting Started page.

#include "Ultrasonic.h"

//  Connect the signal pin of the sensor to Digital pin 7 on the Autonomo
Ultrasonic ultrasonic(7);

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

void loop(){
    long RangeInInches;
    long RangeInCentimeters;
    //  Measure the distance to the Obstacle in Inches
    SerialUSB.println("The distance to obstacles in front is: ");
    RangeInInches =ultrasonic.MeasureInInches();
    SerialUSB.print(RangeInInches); //0~157 inches
    SerialUSB.println(" inch");
    delay(250);
    //  Measure the distance to the Obstacle in Centimeters
    RangeInCentimeters =ultrasonic.MeasureInCentimeters();
    // two measurements should keep an interval  
    SerialUSB.print(RangeInCentimeters); //0~400cm
    SerialUSB.println(" cm");
    delay(250);
}