CC2541DK-MINI: Advertisement Packet header

Hi Anshul,

You can use a sniffer to find out exactly what your device is advertising. Examples of this is given in out BLE Sniffer Guide (  ). The advertisement data is given in the following (from keyfobdemo.c):

// GAP - Advertisement data (max size = 31 bytes, though this is
// best kept short to conserve power while advertisting)
static uint8 advertData[] =
{
  0x02,   // length of first data structure (2 bytes excluding length byte)
  GAP_ADTYPE_FLAGS,   // AD Type = Flags
  DEFAULT_DISCOVERABLE_MODE | GAP_ADTYPE_FLAGS_BREDR_NOT_SUPPORTED,

  // service UUID, to notify central devices what services are included
  // in this peripheral
  0x07,   // length of second data structure (7 bytes excluding length byte)
  GAP_ADTYPE_16BIT_MORE,   // list of 16-bit UUID's available, but not complete list
  LO_UINT16( LINK_LOSS_SERV_UUID ),        // Link Loss Service (Proximity Profile)
  HI_UINT16( LINK_LOSS_SERV_UUID ),
  LO_UINT16( IMMEDIATE_ALERT_SERV_UUID ),  // Immediate Alert Service (Proximity / Find Me Profile)
  HI_UINT16( IMMEDIATE_ALERT_SERV_UUID ),
  LO_UINT16( TX_PWR_LEVEL_SERV_UUID ),     // Tx Power Level Service (Proximity Profile)
  HI_UINT16( TX_PWR_LEVEL_SERV_UUID )
};

Hi Marie,
I want to capture packets send through my Key fob in advertisement mode. How this Packet sniffer will be used not able to understand because i think this software is not going to support CC2541.

Thanks,
Anshul

Hi Anshul,

You would need a dedicated BLE packet sniffer, for example a CC2540 USB dongle running the SmartRF Protocol Packet Sniffer.