Created October 10, 2016 © Apache-2.0

WhereMy...

Inspired by my idea "Where's my baggage", this project will show you how to create your track anything device using Hexiwear on your phone.

BeginnerFull instructions provided1 hour90

Things used in this project

Hardware components

NXP Hexiwear

Android device

Hand tools and fabrication machines

Arm mbed

Story

What is the first challenge after you landed from a red-eye flight, noisy passengers and cannot sleep well?

That's the baggage claim, very often we have to wait and keep focusing the baggage carousel for our baggage, those maybe of similar size and color, with hundreds of people waiting just same as you.

So, as per my idea submitted earlier, "Where's my baggage", I created this project based on Hexiwear in order to track our baggage by our phone.

However, I latter realize battery has to be uninstalled for checked baggage... so I transformed it as track anything device.

The building of this project is simple contains two main components:

A) Hexiwear which enable Bluetooth only when motion detected (Thanks to various sensor available)

B) Smartphone app which detect the Bluetooth signal and notify us

To build my Hexiwear binary, I used https://developer.mbed.org which save me some time to setup the SDK. :)

1) Go to https://developer.mbed.org

2) Register or sign in to your account

3) Create you own project using Wizard or import an example project.

(In my case, I am based on Hexi_BLE_Example)

4) Paste my code on coding section and click "Compile"

5) The project is built and browser will prompt a .bin file to be downloaded.

6) connect Hexiwear docking station to your PC, power on, save the .bin file directly to the USB drive (DAPLINK).

7) Press the reset button for MK64 (on the left, close to the USB connector) to apply the new .bin file

8) Press "Auto" to toggle Bluetooth when motion detected.

9) Drop it into your baggage (or any thing you want to track), so when the baggage is coming out of the baggage carousel, any movement/vibration will toggle the Bluetooth so your smartphone will be alarmed.

Enjoy!

Code

main.cpp

#include "mbed.h"
#include "Hexi_KW40Z.h"
#include "Hexi_OLED_SSD1351.h"
#include "OLED_types.h"
#include "OpenSans_Font.h"
#include "string.h"
#include "FXOS8700.h"

#define LED_ON      0
#define LED_OFF     1

FXOS8700 accel(PTC11, PTC10);
FXOS8700 mag(PTC11, PTC10);

void StartHaptic(void);
void StopHaptic(void const *n);
void txTask(void);

DigitalOut redLed(LED1,1);
DigitalOut greenLed(LED2,1);
DigitalOut blueLed(LED3,1);
DigitalOut haptic(PTB9);

/* Define timer for haptic feedback */
RtosTimer hapticTimer(StopHaptic, osTimerOnce);

/* Instantiate the Hexi KW40Z Driver (UART TX, UART RX) */ 
KW40Z kw40z_device(PTE24, PTE25);

/* Instantiate the SSD1351 OLED Driver */ 
SSD1351 oled(PTB22,PTB21,PTC13,PTB20,PTE6, PTD15); /* (MOSI,SCLK,POWER,CS,RST,DC) */

/*Create a Thread to handle sending BLE Sensor Data */ 
Thread txThread;

 /* Text Buffer */ 
char text[20]; 

float accel_data[3];
int old[3];
int new1[3];

uint8_t enable1 = 0;
uint8_t auto1 = 0;
DigitalOut led(LED1,0);

/****************************Call Back Functions*******************************/
void ButtonRight(void) //auto
{
    oled_text_properties_t textProperties = {0};
    oled.GetTextProperties(&textProperties);
    StartHaptic();
    auto1 = !auto1;
    led = !led;
    wait(1.0f);
    led = !led;
    if (auto1){
        textProperties.fontColor   = COLOR_WHITE;
        oled.SetTextProperties(&textProperties);
        strcpy((char *) text,"Auto");
        oled.Label((uint8_t *)text,60,80);
        txThread.start(txTask);
    }else{
        textProperties.fontColor   = COLOR_GRAY;
        oled.SetTextProperties(&textProperties);
        strcpy((char *) text,"Auto");
        oled.Label((uint8_t *)text,60,80);
        txThread.terminate();
        kw40z_device.ToggleAdvertisementMode();
    }
}

void ButtonLeft(void) //enable
{
    StartHaptic();
    kw40z_device.ToggleAdvertisementMode();
}

void PassKey(void)
{
    StartHaptic();
    strcpy((char *) text,"PAIR CODE");
    oled.TextBox((uint8_t *)text,0,25,95,18);
  
    /* Display Bond Pass Key in a 95px by 18px textbox at x=0,y=40 */
    sprintf(text,"%d", kw40z_device.GetPassKey());
    oled.TextBox((uint8_t *)text,0,40,95,18);
}

/***********************End of Call Back Functions*****************************/

/********************************Main******************************************/

int main()
{    
    /* Register callbacks to application functions */
    kw40z_device.attach_buttonLeft(&ButtonLeft);
    kw40z_device.attach_buttonRight(&ButtonRight);
    kw40z_device.attach_passkey(&PassKey);

    /* Turn on the backlight of the OLED Display */
    oled.DimScreenON();
    
    /* Fills the screen with solid black */         
    oled.FillScreen(COLOR_BLACK);

    /* Get OLED Class Default Text Properties */
    oled_text_properties_t textProperties = {0};
    oled.GetTextProperties(&textProperties);    
        
    /* Change font color to Blue */ 
    textProperties.fontColor   = COLOR_WHITE;
    oled.SetTextProperties(&textProperties);
    
    /* Display Bluetooth Label at x=17,y=65 */ 
    strcpy((char *) text,"WhereMY...");
    oled.Label((uint8_t *)text,17,65);
    
    /* Change font color to white */ 
    textProperties.fontColor   = COLOR_WHITE;
    textProperties.alignParam = OLED_TEXT_ALIGN_CENTER;
    oled.SetTextProperties(&textProperties);
    
    strcpy((char *) text,"Enable |");
    oled.Label((uint8_t *)text,5,80);
    
    textProperties.fontColor   = COLOR_GRAY;
    oled.SetTextProperties(&textProperties);
    strcpy((char *) text,"Auto");
    oled.Label((uint8_t *)text,60,80);
    
    led = !led;
    
    accel.accel_config();
    
    accel.acquire_accel_data_g(accel_data);
    old[0] = (int) abs(accel_data[0]*10);
    old[1] = (int) abs(accel_data[1]*10);
    old[2] = (int) abs(accel_data[2]*10);
  
    while (true) 
    {
        blueLed = !kw40z_device.GetAdvertisementMode(); /*Indicate BLE Advertisment Mode*/   
        Thread::wait(50);
    }
}

/******************************End of Main*************************************/


/* txTask() transmits the sensor data */
void txTask(void){
   
   while (auto1) 
   {
        accel.acquire_accel_data_g(accel_data);
        
        
    oled_text_properties_t textProperties = {0};
    oled.GetTextProperties(&textProperties);
    textProperties.fontColor   = COLOR_WHITE;
    oled.SetTextProperties(&textProperties);

    new1[0] = (int) abs(accel_data[0]*10);
    new1[1] = (int) abs(accel_data[1]*10);
    new1[2] = (int) abs(accel_data[2]*10);

    if ( old[0]!=new1[0] || old[1]!=new1[1] || old[2]!=new1[2] ){
        kw40z_device.ToggleAdvertisementMode();
        blueLed!=blueLed;
        Thread::wait(10000);

        old[0]=new1[0];
        old[1]=new1[1];
        old[2]=new1[2];
        blueLed!=blueLed;

        kw40z_device.ToggleAdvertisementMode();
    }
    Thread::wait(1000);                 
  }
}

void StartHaptic(void)  {
    hapticTimer.start(50);
    haptic = 1;
}

void StopHaptic(void const *n) {
    haptic = 0;
    hapticTimer.stop();
}

Credits

Taiyuk

3 projects • 7 followers

WhereMy...

Things used in this project

Hardware components

Hand tools and fabrication machines

Story

Schematics

WhereMy

Code

main.cpp

Credits

Taiyuk

Comments

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WhereMy...

WhereMy...

Things used in this project

Hardware components

Hand tools and fabrication machines

Story

Schematics

WhereMy

Code

main.cpp

Credits

Taiyuk

Comments