Grove - Ultrasonic Ranger

Introduction

3.3V 5.0V

This Grove - Ultrasonic ranger is a non-contact distance measurement module which works at 40KHz. When we provide a pulse trigger signal with more than 10uS through singal pin, the Grove_Ultrasonic_Ranger will issue 8 cycles of 40kHz cycle level and detect the echo. The pulse width of the echo signal is proportional to the measured distance. Here is the formula: Distance = echo signal high time * Sound speed (340M/S)/2. Grove_Ultrasonic_Ranger’s trig and echo singal share 1 SIG pin.

Warning

Do not hot plug Grove-Ultrasonic-Ranger, otherwise it will damage the sensor. The measured area must be no less than 0.5 square meters and smooth.

Version

Product Version	Changes	Released Date
Grove-Ultrasonic ranger V1.0	Initial	Mar 2012
Grove-Ultrasonic ranger V2.0	Improve the power stability with low-voltage main board with below changes: 1. Added an capacitance C14 2. Redesigned the layout to make it more tidy 3. Compatible with 3.3V voltage system	July 2017

Specification

Parameter	Value/Range
Operating voltage	3.2~5.2V
Operating current	8mA
Ultrasonic frequency	40kHz
Measuring range	2-350cm
Resolution	1cm
Output	PWM
Size	50mm X 25mm X 16mm
Weight	13g
Measurement angle	15 degree
Working temperature	-10~60 degree C
Trigger signal	10uS TTL
Echo signal	TTL

Tip

More details about Grove modules please refer to Grove System

Platforms Supported

Getting Started

Play With Arduino

Hardware

Step 1. Prepare the below stuffs:

Seeeduino V4.2	Base Shield	Grove - Ultrasonic Ranger

Get ONE Now	Get ONE Now	Get ONE Now

Step 2. Connect Ultrasonic Ranger to port D7 of Grove-Base Shield.
Step 3. Plug Grove - Base Shield into Arduino.
Step 4. Connect Arduino to PC through a USB cable.

Note

If we don’t have Grove Base Shield, We also can directly connect Grove_Ultrasonic_Ranger to Arduino as below.

Seeeduino	Grove-Ultrasonic Ranger
5V	Red
GND	Black
Not Conencted	White
D7	Yellow

Software

Step 1. Download the UltrasonicRanger Library from Github.
Step 2. Refer How to install library to install library for Arduino.
Step 3. Copy the code into Arduino IDE and upload.

#include "Ultrasonic.h"

Ultrasonic ultrasonic(7);
void setup()
{
    Serial.begin(9600);
}
void loop()
{
    long RangeInInches;
    long RangeInCentimeters;

    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);
}

Step 4. We will see the distance display on terminal as below.

The distance to obstacles in front is:
2 inches
6 cm
The distance to obstacles in front is:
2 inches
6 cm
The distance to obstacles in front is:
2 inches
6 cm

Play With Raspberry Pi

Hardware

Step 1. Prepare the below stuffs:

Raspberry pi	GrovePi_Plus	Grove - Ultrasonic Ranger

Get ONE Now	Get ONE Now	Get ONE Now

Step 2. Plug the GrovePi_Plus into Raspberry.
Step 3. Connect Grove-Ultrasonic ranger to D4 port of GrovePi_Plus.
Step 4. Connect the Raspberry to PC through USB cable.

Software

Step 1. Follow Setting Software to configure the development environment.
Step 2. Git clone the Github repository.

cd ~
git clone https://github.com/DexterInd/GrovePi.git

Step 3. Excute below commands to use the ultrasonic_ranger to meansure the distance.

cd ~/GrovePi/Software/Python
python grove_ultrasonic.py

Here is the grove_ultrasonic.py code.

# GrovePi + Grove Ultrasonic Ranger

from grovepi import *

# Connect the Grove Ultrasonic Ranger to digital port D4
# SIG,NC,VCC,GND

ultrasonic_ranger = 4

while True:
    try:
        # Read distance value from Ultrasonic
        print ultrasonicRead(ultrasonic_ranger)

    except TypeError:
        print "Error"
    except IOError:
        print "Error"

Step 4. We will see the distance display on terminal as below.

pi@raspberrypi:~/GrovePi/Software/Python $ python grove_ultrasonic.py
9
9
9
9
9
9
9
9
9
9
9

FAQs

Please click here to see all Grove-Ultrasonic Ranger FAQs.

Tech Support

Please do not hesitate to contact techsupport@seeed.cc if you require further information.

Resources

[PDF] Download Wiki PDF
[PDF] Grove_Ultrasonic Ranger Schematic
[Library] Grove_Ultrasonic Ranger library
[Project]The Color Helix
[Project]Indoor Lightning Cloud
[Project]Automatic Water Level Controller
[Example] Example_Measure_distance_and_led_display
[Example] Example_Measure_and_display_the_distance

Arduino	Wio	BeagleBone	Raspberry Pi	LinkIt ONE

Caution

The platforms mentioned above as supported is/are an indication of the module's hardware or theoritical compatibility. We only provide software library or code examples for Arduino platform in most cases. It is not possible to provide software library / demo code for all possible MCU platforms. Hence, users have to write their own software library.

Help us make it better

Welcome to the new documentation system of Seeed Studio. We have made a lot of progress comparing to the old wiki system and will continue to improve it to make it more user friendly and helpful. The improvement can't be done without your kindly feedback. If you have any suggestions or findings, you are most welcome to submit the amended version as our contributor via Github or give us suggestions in the survey below, it would be more appreciated if you could leave your email so that we can reply to you. Happy Hacking!