RE: UART Service Pairing

Joakim Jakobsen — Thu, 07 May 2020 00:11:34 GMT

Hi!

Sorry about the delay here. And thank you for the kind words!

Yes, you are correct. The ble_app_uart_c example scans for all nearby devices that are advertising, but will only connect to those with the NUS UUID.

From the ble_app_uart_c example:
Main.c - line:191

    err_code = nrf_ble_scan_filter_set(&m_scan, SCAN_UUID_FILTER, &m_nus_uuid);
    APP_ERROR_CHECK(err_code);

    err_code = nrf_ble_scan_filters_enable(&m_scan, NRF_BLE_SCAN_UUID_FILTER, false);
    APP_ERROR_CHECK(err_code);

You can see that the app will set and enable the UUID filter.

Yes, you can also connect using the address as a scan filter.
You can change this by using the SCAN_ADDR_FILTER to filter for addresses instead.
Note that you can also change the UUID to avoid the problem you describe, but make sure the UUID match in both the peripheral and the central.

If you have any further questions, let me know!
Best regards,
Joakim Jakobsen