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CC2540 Stops Advertising After Two Minutes When Extra Data in Advertisement Packet Is Added

David Ireland1
Prodigy 10 points

Greetings,

I am running the SimpleBLEBroadcaster project. I have made changes to advertise for 5 seconds and do nothing for 60 seconds  and then repeat - using a timer event.

This works very well, however when I add extra data into advertisement packets the device only advertises for 2 minutes and then stops.

My event code and two examples of working / not-working advertisement packets are below.

Any suggestions? Thanks.

// -----------------Timer Event Code------------------------------------------------------------

if (events & START_ADV_TX)

  {
    uint8 current_adv_status;
    GAPRole_GetParameter( GAPROLE_ADVERT_ENABLED, &current_adv_status);
    if (current_adv_status == FALSE)   {
        uint8 adv_status = TRUE;
        GAPRole_SetParameter( GAPROLE_ADVERT_ENABLED, sizeof( uint8 ), &adv_status );   
        osal_start_timerEx( simpleBLEBroadcaster_TaskID, START_ADV_TX, 5000);
    }  else   {
        uint8 adv_status = FALSE;
        GAPRole_SetParameter( GAPROLE_ADVERT_ENABLED, sizeof( uint8 ), &adv_status );   
    }
 ....

if ( events & SBP_START_DEVICE_EVT )
  {
    // Start the Device
    VOID GAPRole_StartDevice( &simpleBLEBroadcaster_BroadcasterCBs );
    osal_start_timerEx( simpleBLEBroadcaster_TaskID, START_ADV_TX, 60000);
    return ( events ^ SBP_START_DEVICE_EVT );
  }

// -----------------Advertisement Packet Code------------------------------------------------------------

// Advertises For Two Minutes and and Stops :(

static uint8 advertData[] =
{
  0x02,   // length of this data
  GAP_ADTYPE_FLAGS,
  GAP_ADTYPE_FLAGS_GENERAL | GAP_ADTYPE_FLAGS_BREDR_NOT_SUPPORTED
  // GAP_ADTYPE_FLAGS_BREDR_NOT_SUPPORTED,

  // three-byte broadcast of the data "1 2 3"
  0x04,   // length of this data including the data type byte
  GAP_ADTYPE_MANUFACTURER_SPECIFIC,      // manufacturer specific advertisement data type
  0x11,
  0x12,
  0x13
};

// Advertises indefinitely. :)

static uint8 advertData[] =
{
  0x02,   // length of this data
  GAP_ADTYPE_FLAGS,
  GAP_ADTYPE_FLAGS_GENERAL | GAP_ADTYPE_FLAGS_BREDR_NOT_SUPPORTED
};

  • 0
    Expert 2500 points

    Hi David, 

    You can try as follow:

    1. If you want to advertise for 5 second only, you should use limited advertisement mode not general advertisement mode. Enable advertisement again on event.

    2. Your advert data will contain flag

    "GAP_ADTYPE_FLAGS_LIMITED | GAP_ADTYPE_FLAGS_BREDR_NOT_SUPPORTED"

    3.For other structure:

    static uint8 advertData[] = 
    { 
      0x02,   // length of this data
      GAP_ADTYPE_FLAGS,
      GAP_ADTYPE_FLAGS_LIMITED | GAP_ADTYPE_FLAGS_BREDR_NOT_SUPPORTED,
      // GAP_ADTYPE_FLAGS_BREDR_NOT_SUPPORTED,

      // three-byte broadcast of the data "1 2 3"
      0x04,   // length of this data including the data type byte
      GAP_ADTYPE_MANUFACTURER_SPECIFIC,      // manufacturer specific advertisement data type
      0x11,
      0x12,
      0x13
    };

    You forgot comma at highlighted line. Didn't it give you compiler warning?

    3. Instead of turning on and off advertisement, Set advertisement to limited mode and timeout = 5 second. So device will stop advertisement after 5 second automatically.

    GAP_SetParamValue( TGAP_LIM_ADV_TIMEOUT, 5);

    Hope this will help.

    Maulik