Using nRF52-DK for BLE Relay

[dilbert168]

I recently got the nRF52-DK for using as BLE Relay evaluation.

I have downloaded following and installed to run the code

- Segger Embedded Studio (v5.1)

- nRF5_SDK_17.0.2_d674dde

I have build and loaded the "examples\ble_central\ble_app_blinky_c" project, but the App doesn't seems doing much.

Is there an example project which do the following ?  If there is documentation for the example project be even better. 

- Scan for available BLE device on list

- Connect BLE device base on handler

- Discover available services and setup for notification to receive data from device

[Kenneth]

- Scan for available BLE device on list

- Connect BLE device base on handler

- Discover available services and setup for notification to receive data from device

 The examples\ble_central\ble_app_blinky_c does exactly that if you study the code in main.c

Best regards,
Kenneth

[dilbert168]

Are you referring to the callback

ble_evt_handler(ble_evt_t const * p_ble_evt, void * p_context)

There isn't any code for handling the "BLE_GAP_EVT_ADV_REPORT", 

I am guessing this is for device advertising data report ?

I do see "BLE_GAP_EVT_CONNECTED" but cannot see any code how to trigger the device connection on the list.

Thanks for your advice

[Kenneth]

It could be handled in ble_evt_handler() directly also if you want, but in this case the example include a nrf_ble_scan module, see scan_start()->nrf_ble_scan_start(). You can find that nrf_ble_scan_on_ble_evt() is doing handling of BLE_GAP_EVT_ADV_REPORT.

You may use the nrf_ble_scan.c as reference on how to start scanning and handle BLE_GAP_EVT_ADV_REPORT to parse the data you are looking for directly if you want to.

Best regards,
Kenneth

[dilbert168]

Thanks.

I also noticed that the call below will connect my device after I changed the name.

Since, I need to support multiple device, need to connect base on MAC address + name.

Will take a look at nrf_ble_scan.c... 

nrf_ble_scan_filter_set(&m_scan, SCAN_NAME_FILTER, m_target_periph_name);

Do you know any Application Note document for using BLE API in Central (master) mode  ?

[Kenneth]

I believe there should be a few of the central examples that use the nrf_ble_scan module, so you may also check out those. In terms of documentation you can check out:

https://infocenter.nordicsemi.com/topic/sdk_nrf5_v17.0.2/lib_ble_scan.html

The scan module is a wrapper around the softdevice api, and for the softdevice api you can check out message sequence charts:

https://infocenter.nordicsemi.com/topic/com.nordic.infocenter.s132.api.v7.2.0/group___b_l_e___g_a_p___s_c_a_n___m_s_c___l_e_g_a_c_y.html