Published September 18, 2016 © GPL3+

MotionWear

Want to measure your activity over the course of 12 hours? Here's your gadget! This could be your sleep or even your daily activity.

BeginnerFull instructions provided4 minutes1,013

Things used in this project

Hardware components

NXP Hexiwear

Software apps and online services

mBed OS online compiler

Story

What is it?

As you may have figured out by the title, this is a motion detector. MotionWear uses the gyro sensor on the Hexiwear and calculates the RMS (root mean square) of the three axis of your motion. It will then take that information and output it onto the 1.1in. OLED screen on the Hexiwear as a bar graph. At the end of 12 hours you will have a bar graph of your activity with each data point being your average movement per 30min.

What can this be used for?

Anything you want to track the motion of over a long period of time! This could be your sleep motion, or your daily motion. The Hexiwear is small enought to fit right into your pocket. Just click the reset button (on the back of the Hexiwear) whenever you want to re/start!

How do you make it?

Easy! Just download the .bin file in the attachments section, drag-and-drop it into the “DAPLINK” drive that appears after you plug in the Hexiwear, and then reset the Hexiwear to start the program.

Here’s the step-by-step instruction for what to do:

1. Plug the Hexiwear into the Docking Station.

Docking Station

Hexiwear and Docking station contact points

The Hexiwear should plug in nicely with the contact points

2. Plug a Micro USB cable into the Micro USB port on the Docking Station.

Micro USB plug and port

3. Plug the other end of the USB cable to your computer’s USB port.

The other end of the USB cable

4. Flip the switch on the Docking Station to turn on the Hexiwear. A green LED with the letters “PWR” above it should turn on. You should also see a new mass-storage drive named “DAPLINK” appear.

Green LED indicates that the Hexiwear is on

"DAPLINK" drive

5. Go to the Attachments section of this project and download the .zip folder from the GitHub link.

6. Extract the files in the zip folder.

7. Double-check the debugger. The switches’ positions should be up, up, down, down, up, up, up, up.

8. Drag-and-drop the file “Motion_HEXIWEAR.bin” into the “DAPLINK” drive.

9. Wait for the file to finish it’s transferring into “DAPLINK”, when it’s done the Hexiwear’s screen should be blank (black).

10. Push the MK64 reset button on the Docking Station (it’s the button with the pink top and a small “MK64” printed above it).

That’s it! After you press the reset button, the program will start.

How to use the MotionWear case (optional)...

After you print our the case ("MotionWearCaseForPrint.f3d" or "MotionWearCaseForPrint.stl") you will notice that there are two other items along with the case: a long axle and a tiny rod with a stopper.

Long Axel

Small rod with stopper

First you will need to slide the axle trought the hinge (the part that is on the other side of the Hexiwear compared to the hooking part).

Hinge and Slot

Then you will need to slide the small rod, stopper side first, into a hole located at the bottom half of the hexiwear.

Small rod hole. Insert stopper first!

Lastely, put the hexiwear into the case (making sure the the small rod fits into the reset hole at the bottom of the hexiwear). That's it, you got you case!

The code explained…

Basically, what it does is it tells the Hexiwear to collect data every minute from the three axes of the gyro sensor. It then converts the three data points into a single number the determines your motion from the scale of 0-1000. After it does this 30 time (in other words after 30min.) it will average all 30 data points and draw a bar graph on the Hexiwear’s OLED screen. The code will repeat this 30min. process 24 times. In total, the code takes 12hrs. to complete.

Final notes

So, there you have it! A simple project for the Hexiwear platform. Please respect this project if you liked it, and please feel free to leave comments or questions for this project!

*please note that the attachment ".f3d" can't be printed because it has a Hexiwear (shape) in it that would also be printed*

Thanks!

Custom parts and enclosures

File missing, please reupload.

Schematics

Code

main.cpp

#include "mbed.h"
#include "FXAS21002.h"
#include "Hexi_OLED_SSD1351.h"

SSD1351 oled(PTB22,PTB21,PTC13,PTB20,PTE6, PTD15);
FXAS21002 gyro(PTC11,PTC10);

float gyDat[3];
int Dat[30];
//int Dat[6];
float rms=0.0;
char txt[20];
int x=0, y;
long notAvDat;

// main() runs in its own thread in the OS
// (note the calls to Thread::wait below for delays)
int main() {
    //setup oled
    oled_text_properties_t txtProp = {0};
    oled.GetTextProperties(&txtProp);
    oled.DimScreenON();
    oled.FillScreen(COLOR_BLACK);
    
    gyro.gyro_config();
    for(int l=0;l<24;l++){
        for(int l=0;l<30;l++){
        //for(int l=0;l<6;l++){
            gyro.acquire_gyro_data_dps(gyDat);
            rms = sqrt(((gyDat[0]*gyDat[0])+(gyDat[1]*gyDat[1])+(gyDat[2]*gyDat[2]))/3);
            int rrms= (int) rms;
            y= rrms*96/1000;
          
            Dat[l]=y;
            //Thread::wait(10000);
            Thread::wait(60000);
        }
        for(int l=0;l<30;l++){
        //for(int l=0;l<6;l++){
            notAvDat+= Dat[l];
        }
        y=notAvDat/30;
        //y=notAvDat/6;
        oled.DrawBox(x, 95-y, 4, y, COLOR_WHITE);
        x+=4;
    } 
    x=0;
}

Credits

Kenneth Yang

9 projects • 100 followers

Maker, developer, 3D content creator

MotionWear

Things used in this project

Hardware components

Software apps and online services

Story

What is it?

What can this be used for?

How do you make it?

How to use the MotionWear case (optional)...

The code explained…

Final notes

Custom parts and enclosures

Enclosure with Reset Button (.f3d)

MotionWearCaseForPrint.f3d

MotionWearCaseForPrint.stl

Schematics

Development board

Code

main.cpp

Motion_HEXIWEAR

Credits

Kenneth Yang

Comments

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MotionWear

MotionWear

Things used in this project

Hardware components

Software apps and online services

Story

What is it?

What can this be used for?

How do you make it?

How to use the MotionWear case (optional)...

The code explained…

Final notes

Custom parts and enclosures

Enclosure with Reset Button (.f3d)

MotionWearCaseForPrint.f3d

MotionWearCaseForPrint.stl

Schematics

Development board

Code

main.cpp

Motion_HEXIWEAR

Credits

Kenneth Yang

Comments

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