irk_match when having a BLE_GAP_EVT_CONNECTED

Question

Hi all, 
 I have made my own device manager because the device manager from Nordic is somewhat bloat (in code and resources) and I needed to add a feature, ranking the devices so the less used device is removed when the storage is full and a new devices wants to bond. I was not able to create this feature outside the device manager. Anyway, I want to test the manager and every thing is working well. The only thing I am not able to test is irk. I never see an irk_match. The devices gets identified by means of the address or by means of the diversifier. I find this rather strange be cause the iPhone uses a random address, so it should be identified with an irk.
Does anybody knows why I do not get a irk_match in a connect event? 
 Thanks in advance, 
 Marcel

Ulrich Myhre · Accepted Answer

Hi, 
 You will only get an irk_match if you advertise or connect using a whitelist with IRKs in it (irk_count > 0). As a peripheral, the SoftDevice will resolve all devices trying to connect to or scan it and only respond if there is a hit in the address or IRK whitelists. As a central, the SoftDevice will process all connectable advertisers that use resolvable address types and match them before trying to connect 
 If a connection happens due to a match coming from the IRK part of the whitelist, the index to entry which was matched will be present in the irk_match field of the connected event.