LP-EM-CC2340R5: Changing of BLE Device Name during runtime

Hello Ali,

Thanks for reaching out.

So, if you want to change the device advertisement name, you can do it through SysConfig as shown in the image below.

If you need to modify this during runtime, you can see that the name is being stored in "attDeviceName" variable which is part of the parameters stored in appMainParams (of type BLEAppUtil_GeneralParams_t ). You can see this definition in app_main.c

Please make sure the name is no longer than GAP_DEVICE_NAME_LEN, which is 21 characters.

BR,

David.

Dear David

I changed the variable  on unit app_main.c (see below), but the adversiting name "Data Stream" remains when pairing.

void appMain(void)
{
#if !defined(Display_DISABLE_ALL)
    MenuModule_params_t params = {
      .mode = MenuModule_Mode_PRINTS_ONLY
    };

    if(MenuModule_init(NULL, &params) != SUCCESS)
    {
    // TODO: Call Error Handler
    }
#endif // #if !defined(Display_DISABLE_ALL)

    attDeviceName[0] = 'T';
    attDeviceName[1] = 'E';
    attDeviceName[2] = 'S';
    attDeviceName[3] = 'T';
    attDeviceName[4] = '1';
    attDeviceName[5] = '2';
    attDeviceName[6] = '3';
    attDeviceName[7] = '4';
    attDeviceName[8] = '5';
    attDeviceName[9] = '6';
    attDeviceName[10] = '7';
    attDeviceName[11] = '8';

    // Call the BLEAppUtil module init function
    BLEAppUtil_init(&criticalErrorHandler, &App_StackInitDoneHandler,
                    &appMainParams, &appMainPeriCentParams);
}

Hello Ali,

Could you please try modifying it in SysConfig first. My guess here is that whatever modification you are doing is being overwritten by what is defined in SysConfig.

BR,

David.

Hello David,

thanks for the feedback.

If I change it via sysconfig, the new device name works fine.

    attDeviceName[0] = 'T';
    attDeviceName[1] = 'E';
    attDeviceName[2] = 'S';
    attDeviceName[3] = 'T';

    scanResData1 [0] = 'T';
    scanResData1 [1] = 'E';
    scanResData1 [2] = 'S';
    scanResData1 [3] = 'T';

    // Call the BLEAppUtil module init function
    BLEAppUtil_init(&criticalErrorHandler, &App_StackInitDoneHandler,
                    &appMainParams, &appMainPeriCentParams);

Ali

Hello Ali,

Understood. If you look inside the BLEAppUtil_init() function, you can see that the GGS_SetParameter() function is being used (see ble_stack_api.c), where the pAttDeviceName is the pvalue 3rd parameter. Please look into the GAP GATT Service section of the User`s Guide for more info about it.

BR,

David.

Hello David,

I don´t see the GGS_SetParameter() function inside of BLEAppUtil_init (see below). Remember, I'm using the sample program "Data Stream". Where do I have to change which variable on runtime?

void BLEAppUtil_init(ErrorHandler_t errorHandler, StackInitDone_t initDoneHandler,
                     BLEAppUtil_GeneralParams_t *initGeneralParams,
                     BLEAppUtil_PeriCentParams_t *initPeriCentParams)
{
    // Register the application error handler
    errorHandlerCb = errorHandler;

    // Register the init done handler - will be called from the GAP_DEVICE_INIT_DONE_EVENT
    appInitDoneHandler = initDoneHandler;

    // Assign the BLEAppUtil parameters from the user to the local parameters
    BLEAppUtilLocal_GeneralParams = initGeneralParams;
    BLEAppUtilLocal_PeriCentParams = initPeriCentParams;

    // Create a message queue for message to be sent to BLEAppUtil
    BLEAppUtil_createQueue();

    // Create BLE stack task
    bleStack_createTasks();

    // Create local app task
    BLEAppUtil_createBLEAppUtilTask();

    // Construct a mutex that will be used by the following functions:
    // BLEAppUtil_registerEventHandler
    // BLEAppUtil_unRegisterEventHandler
    // BLEAppUtil_callEventHandler
    pthread_mutex_init(&mutex, NULL);
}

Kind regards

Ali

Hello Ali,

Understood. You can change the advertisement data and scan response data (specifically the GAP_ADTYPE_LOCAL_NAME_COMPLETE field). Please take a look at our training material here (Advertising Task 2 – Change the Advertisement Data). In addition, you can also take a look at our User's Guide section for Changing Adv parameters.

You can also leverage this e2e thread (however it is for a different family of devices the approach is very similar).

BR,

David.