Self-portrait,anti-lost,anti-theft,voice recording device:

Product

Itag is a kind of bluetooth 4.0 low energy products which works through a Itracing App.Itag can chain user's easy-lost & valuable belongs together and works with smart phone to prevent lost.

Itag is also a remote control of your smart phone camera for self-portrait.

Itag can also provide a last seen pin-drop on map to help you recover your items and search your cars in parking site.

Specification:

Bluetooth version:Bluetooth 4.0 low energy consumption

Compatible device:iphone 4S/5/5S/5C/6/6Plus/6C, Ipad Mini, Itouch5,Ipad 3/4 adn android system,Bluetooth 4.0 smart phone(Android 4.3 version and upgrade version)

Working distance:<10 m(outdoor environment)

Battery:CR2032 Lithium Coin Battery,Last about half a year.

Package

User Manual

UUID,就是用来唯一识别一个特征值的ID.

handle，就是对应的attribute的一个句柄。

所有对特征值的操作，都是通过对UUID的搜索得到对应的handle之后，通过handle来操作特征值的。

添加新的特征值CHAR6

下面对主要几个文件进行修改

simpleGATTprofile.h文件添加以下定义

#define SIMPLEPROFILE_CHAR6                  5

#define SIMPLEPROFILE_CHAR6_UUID           0xFFF6

#define SIMPLEPROFILE_CHAR6_LEN          5（单字节没这句）

SIMPLEPROFILE_CHAR6 全大写case参数用到如case SIMPLEPROFILE_CHAR6：

在simpleGATTprofile.c

1、  添加特征值UUID

// Characteristic 6 UUID: 0xFFF6

CONST uint8 simpleProfilechar6UUID[ATT_BT_UUID_SIZE] =

{ 

LO_UINT16(SIMPLEPROFILE_CHAR6_UUID),   //低八位

HI_UINT16(SIMPLEPROFILE_CHAR6_UUID) }; //高八位

/**************#define HI_UINT16(a)   (((a) >> 8) & 0xFF)*******

/**************#define LO_UINT16(a)  ((a) & 0xFF)*******

2、  设置属性    

// Simple Profile Characteristic 6 Properties 可读可写（声明而已，只是能让lightblue在列表中显示为可读可写或通知，真正要改在属性表那里改。Props= Properties，Desp=Description，）

static uint8 simpleProfileChar6Props = GATT_PROP_READ | GATT_PROP_WRITE;

// Characteristic 6 Value   // simpleProfileChar6是个5位数组，接收数据后存在这

static uint8simpleProfileChar6[SIMPLEPROFILE_CHAR6_LEN] = { 0, 0, 0, 0, 0 };

// Simple Profile Characteristic 6 User Description

static uint8 simpleProfileChar6UserDesp[17] = "Characteristic 6\0";

3、  属性表 （Profile Attributes - Table）最重要，添加了这个才会在lightblue中列表出来

static gattAttribute_t simpleProfileAttrTbl[SERVAPP_NUM_ATTR_SUPPORTED]

这里要把数组改为

#define SERVAPP_NUM_ATTR_SUPPORTED       20 原来是17

                                     （//添加了3组结构体数组CHAR6）

simpleProfileAttrTbl表中，可读可写属性都是3个数组，只有char4的通知是4组，多了个// Characteristic 4 configuration

并把CHAR6添加进去

 // Characteristic 6 Declaration （声明，没加这个lightblue属性表找不到）

   {

     { ATT_BT_UUID_SIZE, characterUUID },

     GATT_PERMIT_READ,

     0,

     &simpleProfileChar6Props

   },

// Characteristic Value 6   （特征值）！！！

     { 

       { ATT_BT_UUID_SIZE, simpleProfilechar6UUID },

       GATT_PERMIT_READ | GATT_PERMIT_WRITE,  //设置可读可写

       0, 

       simpleProfileChar6 //由于值是5位数组，不用&，一个字节就用

     },

 // Characteristic 6 User Description  //描述

     { 

       { ATT_BT_UUID_SIZE, charUserDescUUID },

       GATT_PERMIT_READ, 

       0, 

       simpleProfileChar6UserDesp 

     },

能列出来了但是 点进去会报错，还没设置读写参数simpleProfile_WriteAttrCB, 和

simpleProfile_ReadAttrCB

4、设置参数函数 （SimpleProfile_SetParameter函数）

bStatus_t SimpleProfile_SetParameter( uint8 param, uint8 len, void *value )中：

//即修改SimpleProfile_SetParameter（）；函数

添加以下代码：

case SIMPLEPROFILE_CHAR6:

     if ( len == SIMPLEPROFILE_CHAR6_LEN ) //特征值赋值到数组

     {

       VOID osal_memcpy(simpleProfileChar6, value, SIMPLEPROFILE_CHAR6_LEN );

 //把要改写的数据写到simpleProfileChar6数组来

     }

     else

     {

       ret = bleInvalidRange;

     }

     break;

4、  获取参数函数 {SimpleProfile_GetParameter（UUID，获取到的值）函数}

                 实际上就是把被新进的值simpleProfileChar6放进value数组

在bStatus_tSimpleProfile_GetParameter( uint8 param, void *value )中添加：

case SIMPLEPROFILE_CHAR6:

     VOID osal_memcpy( value, simpleProfileChar6, SIMPLEPROFILE_CHAR6_LEN );

break;

//读取simpleProfileChar6的值放到*value中，char1是单个字节读取，为

*((uint8*)value) = simpleProfileChar1;

·        6、读写特征值函数（2个回调函数

·        这个两个是注册到GATT层的回调函数,在GATT初始化的时候注册的.这部分代码封装在库里面.

每当GATT层有数据发过来的时候,会调用simpleProfile_WriteAttrCB, 

每当GATT层收到对方读取数据请求的时候,会调用simpleProfile_ReadAttrCB

这两个函数包含在gattServiceCBs_t类型的结构体里CONST gattServiceCBs_t simpleProfileCBs，

读simpleProfile_ReadAttrCB

这个设置后就能在lightblue里读出值，值为

simpleProfileChar6[SIMPLEPROFILE_CHAR6_LEN]={数组的数值（16进制显示）}

写simpleProfile_WriteAttrCB

读取被写进去的值

）

在static uint8 simpleProfile_ReadAttrCB( uint16 connHandle,

                                      gattAttribute_t *pAttr,

                                      uint8 *pValue,  

                                      uint8 *pLen, 

                                      uint16 offset, 

                                      uint8 maxLen )中：

添加 case SIMPLEPROFILE_CHAR6_UUID:

       *pLen = SIMPLEPROFILE_CHAR6_LEN;

       VOID osal_memcpy(pValue, pAttr->pValue, SIMPLEPROFILE_CHAR6_LEN );

      break;        //读：pAttr->pValue的内容复制到pValue

添加单字节char7要在接char1或3后面，不能加break

在simpleProfile_WriteAttrCB（）中添加（添加后发送过去就不会提示出错了）

 case SIMPLEPROFILE_CHAR6_UUID: 

           //Validate the value检测输入数据是否合法

       // Make sure it's not a blob oper

       if ( offset == 0 )//是第一字节

       {

         if ( len != SIMPLEPROFILE_CHAR6_LEN )

         {

           status = ATT_ERR_INVALID_VALUE_SIZE;

         }//若输入长度不对，status为

       }

       else

       {

         status = ATT_ERR_ATTR_NOT_LONG;//不是第一字节

       }

    //Write the value一开始定义了status == SUCCESS，若上述条件不符，不会运行到这里。osal_memcpy（目的A，源地址B，长度）复制B内容到A

       if ( status == SUCCESS )

       {  

       VOID osal_memcpy( pAttr->pValue, pValue, SIMPLEPROFILE_CHAR6_LEN );

       notifyApp = SIMPLEPROFILE_CHAR6;

       }   //写：pValue的内容复制到pAttr->pValue（别弄反了）

       break;

（下面没用到）osal_memset为字符串集体赋同一数值 return目的存储区地址

void *osal_memset(void *dest, uint8 value , intlen)

{

Return memset(dest,value,len);

}

if ( status == SUCCESS )

       {  

uint8 *pCurValue = (uint8 *)pAttr->pValue;

osal_memset(pCurValue, 0, SIMPLEPROFILE_CHAR6_LEN );

                                         //为新数组pCurValue赋值N个0

VOID osal_memcpy(pCurValue, pValue, SIMPLEPROFILE_CHAR6_LEN );

                                   //复制pValue内容到新数组pCurValue                notifyApp = SIMPLEPROFILE_CHAR6;                                                                                           

 }

 break;

7 .在simpleBLEperipheral.c添加初始化值

在void SimpleBLEPeripheral_Init( uint8 task_id )函数中初始化参数

现在可以在手机设备中读取CHAR6的值为0x0102030405；

向char6写进0x3344556677 再读取值已经改写为0x3344556677

General Electrical Specification

Absolute Maximum Ratings:  

Recommended Operating Condition:

1.8V Switch-mode Regulator :

Click here