Reading Beacon UUID 128 bit

[RichardHdrd]

Dear Ladies and Gentlement,

I would like to read the 128bit UUID transmitted an iBeacon received on a S140 ble_central - just similarly as it is done with nordic App nRF Connect.

So when activating the iBeacon device, while scanning for it on the smartphone with nordic nRF Connect app, I see:

N/A(iBeacon)

MAC

Not Bonded

Device type: UNKNOWN

Advertising Type: Legacy

Flags: GeneralDiscoverable, BrEdrNotSupported

Beacon:

Company; Apple, Inc <0x004C>

Type: Beacon <0x02>

Length of data: 21 bytes

UUID: xxxxxxxx-yyyy-zzzz-xxxx-1234567890AB

Major: 5

Minor: 21342

RSSI at 1 m: -60bBm

I'd like to access the fields UUID, Major and Minor and get the corresponding values in my S140 ble_central.

How can I get these values?

I found the following example:

https://devzone.nordicsemi.com/f/nordic-q-a/40563/how-to-read-beacon-uuid-rssi-major-minor-and-tx-power-by-using-nrf52840-dk

But it doesn't seem to render correct results for 128-bit UUIDs.

Best regards,

Richard

[Einar Thorsrud]

Hi Richard,

You get the full advertising payload from the SoftDevice, so you can parse the packet to get all the information you want. As the iBeacon format is fully defined by Apple it makes sense to parse that yourself. You can refer to the packet format here (or get Proximity Beacon Specification R1.pdf from Apple).

To actually get the data so that you can parse them, you need to handle the BLE_GAP_EVT_ADV_REPORT event when scanning. There you get a pointer to a ble_gap_evt_adv_report_t instance, which has the address, RSSI as well as the full payload.

Einar