IRK tutorial

[anuja]

Hi,

I am using nrf52 with S132 and sdk11. I want to implement the irk. Could you please suggest some example or tutorial? Reply ASAP.

[Petter Myhre]

You want to implement IRK? What do you mean? Could you elaborate a bit? Do you mean that you want to use random resolvable address? You can set this with sd_ble_gap_address_set(), see this.

[anuja]

Yes i want to use random resolvable address in relay example.Please explain in detail with sd_ble_gap_address_set() and sd_ble_gap_opt_set().

[Petter Myhre]

It should be explained by the API documentation. What exactly is the problem?

[anuja]

In the relay example the nrf52 is in scanning and advertising mode.My problem is I want that nrf52 should scan and advertise only those packets that I am sending from my android phone,but we want to implement this scenario with custom irk on nrf52 side. I am trying to set the irk in ble_gap_irk_t:

ble_gap_irk_t   ble_gap_irk_nrf;// declared globally
ble_opt_t	      m_static_pin_option;//declared globally

in gap_params_init(); I have following implementaion:

    uint8_t abc_key[BLE_GAP_SEC_KEY_LEN] = {0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0};

    ble_gap_irk_nrf.irk = abc_key;			 
																					
	m_static_pin_option.gap_opt.privacy.p_irk = &ble_gap_irk_nrf;
	m_static_pin_option.gap_opt.privacy.interval_s = BLE_GAP_ADDR_CYCLE_MODE_AUTO;	
	err_code =  sd_ble_opt_set(BLE_GAP_OPT_PRIVACY, &m_static_pin_option);
	APP_ERROR_CHECK(err_code);

it gives me error like this:

..\..\..\main.c(761): error:  #137: expression must be a modifiable lvalue
    ble_gap_irk_zenlab.irk = abc_key;			

How can we set the custom irk? i dont want to whitelist as of now but it should be resolvable with our custom irk.Any solution for this or any tutorial or some explanation will also help.

[Petter Myhre]

What if you do something like this instead:

ble_gap_irk_t ble_gap_irk_nrf = { .irk = { 0x0, 0x0, 0x0 /*...*/} };