How to pair/connect with a MAC address

[DiBosco]

I need to connect to other units according to their MAC address. I'm assuming that this:

BT_SCAN_FILTER_TYPE_ADDR

Is the thing to use in this:

bt_scan_filter_add

So instead of this:

err = bt_scan_filter_add(BT_SCAN_FILTER_TYPE_UUID, BT_UUID_XLRT_SERVICE);

You'd have this:

err = bt_scan_filter_add(BT_SCAN_FILTER_TYPE_ADDR, BT_MAC_ADDRESS);

I can see that you do this:

#define BT_UUID_XLRT_SERVICE BT_UUID_DECLARE_128(XLRT_SERVICE_UUID_VAL)

Where this:

#define XLRT_SERVICE_UUID_VAL \

BT_UUID_128_ENCODE(0x2a1f963c, 0x143a, 0x4f7d, 0x9107, 0x6315196a02a6)

Has been previously defined, but what's the syntax for defining something like BT_MAC_ADDRESS

please? Would be so helpful if you had little code snippets of how to do stuff like this.

Thanks

[Simonr]

Hi

Try something like this (assuming there are no conflicting filters already set in your project:

1. Set up a filter for the MAC address you're interested in connecting to:
   

   err_code = nrf_ble_scan_copy_addr_to_sd_gap_addr(&m_mac_filter, target_mac_addr);
   err_code = nrf_ble_scan_filter_set(&m_scan, SCAN_ADDR_FILTER, &m_mac_filter);
   m_mac_filter.addr_type = BLE_GAP_ADDR_TYPE_RANDOM_STATIC;

2. Enable the address filter:
   

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

   
   

Setting up and enabling a filter should be done before you start scanning.

Best regards,

Simon

[DiBosco]

Hi,

Thanks for that, but it's not answering my question in terms of the syntax for the mac address.  I guess this:

target_mac_addr

is where the mac address itself is stored, but what type of variable is this?

So , for example is it a string of hie kind of format:

45:67:A5:76:AA:FF

Or just a hex number such as

4567A576AAFF

Or...?

Thanks!

[DiBosco]

BTW, what is this random bt all about?

I get this:

Identity: D9:AD:8D:A9:1A:A2 (random)

When I connect with the two dev kits, but also in your snipped you have this:

BLE_GAP_ADDR_TYPE_RANDOM_STATIC

Surely a mac address is a mac address on fixed, not random? Does each unit not have a uniqu MAC address?