cc2541修改广播信号（以蓝牙接入微信为例）

读取设备的 MAC 地址：

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GAPRole_GetParameter(GAPROLE_BD_ADDR, ownAddress);  

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#define GAPROLE_BD_ADDR             0x304  //!< Device's Address. Read Only. Size is uint8[B_ADDR_LEN]. This item is read from the controller.  

因为微信协议规定 advertData 中要有设备的 MAC 地址，所以要将读到的 MAC 地址放到 advertData 中：

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        advertData[ADVERT_MAC_ADDR+0] = ownAddress[5];  
        advertData[ADVERT_MAC_ADDR+1] = ownAddress[4];  
        advertData[ADVERT_MAC_ADDR+2] = ownAddress[3];  
        advertData[ADVERT_MAC_ADDR+3] = ownAddress[2];  
        advertData[ADVERT_MAC_ADDR+4] = ownAddress[1];  
        advertData[ADVERT_MAC_ADDR+5] = ownAddress[0];  
        ownAddress[5] = advertData[ADVERT_MAC_ADDR+5];  
        ownAddress[4] = advertData[ADVERT_MAC_ADDR+4];  
        ownAddress[3] = advertData[ADVERT_MAC_ADDR+3];  
        ownAddress[2] = advertData[ADVERT_MAC_ADDR+2];  
        ownAddress[1] = advertData[ADVERT_MAC_ADDR+1];  
        ownAddress[0] = advertData[ADVERT_MAC_ADDR+0];  
        GAPRole_SetParameter( GAPROLE_ADVERT_DATA, sizeof( advertData ), advertData );  

最后要重新设置 GAPROLE_ADVERT_DATA

微信客户端是通过扫描 BLE 设备的 MAC 地址并连接