scans the beacon message and uuid

[mani]

Hi,

I am using nRF51822 dongle beacon and i have two dongles. iam flashing the code ,beacon transmitter(C:\sdk_12.1.0\examples\ble_peripheral\ble_app_beacon\pca10028\s130\arm5_no_packs) in one beacon and i able to view the data (uuid and major and minor numbers) in android app(i.e Master Control Panel).i want to observe the beacons (i.e scans the data uuid and major and minor values) from second beacon. please tell me which example is used for scanning the beacon's uuid and major,minor values??

[Jørgen Holmefjord]

Hi,

As described in the documentation of the Beacon Transmitter Example, the UUID, major and minor values are broadcast to devices in its range as Manufacturer Specific Data in the advertisement packets. The data is put into an array in the following order:

APP_DEVICE_TYPE,     // Manufacturer specific information. Specifies the device type in this
                     // implementation.
APP_ADV_DATA_LENGTH, // Manufacturer specific information. Specifies the length of the
                     // manufacturer specific data in this implementation.
APP_BEACON_UUID,     // 128 bit UUID value.
APP_MAJOR_VALUE,     // Major arbitrary value that can be used to distinguish between Beacons.
APP_MINOR_VALUE,     // Minor arbitrary value that can be used to distinguish between Beacons.
APP_MEASURED_RSSI    // Manufacturer specific information. The Beacon's measured TX power in
                     // this implementation.

We dont have any examples for scanning for beacons, but you can use any of the Central examples as a starting point for creating your application. The Nordic UART Service Client example is my recommendation.

When the central application receives an advertising packet, you will get a BLE_GAP_EVT_ADV_REPORT event in the BLE event handler, on_ble_evt(). Here you need to extract the manufacturer specific data from the advertisement package and extract the UUID, major and minor values from this.

Best regards,

Jørgen

[Naralasetty Praneeth]

Hi @Jørgen Holmefjord

Jørgen Holmefjord said:

The Nordic UART Service Client example is my recommendation.

When the central application receives an advertising packet, you will get a BLE_GAP_EVT_ADV_REPORT event in the BLE event handler, on_ble_evt(). Here you need to extract the manufacturer specific data from the advertisement package and extract the UUID, major and minor values from this.

can you give me this code if available

[Jørgen Holmefjord]

Unfortunately, we do not have any sample code for this. You get the event in the example as I described below, and the data is available in the struct. It should be simple for you to extract the data from this.

[Naralasetty Praneeth]

Hi @Jørgen Holmefjord

       case BLE_GAP_EVT_ADV_REPORT:
			
                        {
				NRF_LOG_INFO("Advertise received");
				scan_start();
                                ble_gap_addr_t  addr;

                                NRF_LOG_INFO("MAC ADDRESS:  %X:%X:%X:%X:%X:%X AddrType:0x0%d\n", 
                                  addr.addr[5],addr.addr[4],addr.addr[3],
                                    addr.addr[2],addr.addr[1],addr.addr[0],
                                     p_gap_evt->params.adv_report.peer_addr);
				
			} break;

i had use this code in BLE_GAP_EVT_ADV_REPORT to get MAC addresses of near by devices but i am able to build it i am getting errors like:

1) Output/ble_app_uart_c_pca10040_s132 Debug/Obj/main.o: in function `ble_evt_handler':

2) undefined reference to `LOG_INTERNAL_7'

 

[Jørgen Holmefjord]

NRF_LOG macros only support up to 6 arguments. If you need more, you will have to use multiple NRF_LOG macros or use sprintf to print the arguments to a string that you pass to NRF_LOG.

[Naralasetty Praneeth]

Hi @Jørgen Holmefjord,

can you please help how to do that