error in ble_gap_privacy_set()

[Imen]

I’m using the library pc_ble_driver_py last release 0.14.1, and Nordic DevKit PCA10040. My goal is to set the central IRK value and generate a private resolvable address.

I call ble_gap_privacy_set to set a new IRK with privacy mode = BLE_GAP_PRIVACY_MODE_DEVICE_PRIVACY & private_addr_type = BLE_GAP_ADDR_TYPE_RANDOM_PRIVATE_RESOLVABLE; No error is returned however when I call ble_gap_addr_get after that it returns always centralAdd.addr_type = Types.random_static (0x01) instead of BLE_GAP_ADDR_TYPE_RANDOM_PRIVATE_RESOLVABLE (0x02). Please see the code below:

        centralNewIRK = BLEGapPrivacyParams(privacy_mode, 0, private_addr_cycle_s, irk)

        centralNewIRK.privacy_mode = 0x01

        centralNewIRK.private_addr_type = 0x02

        centralNewIRK.private_addr_cycle_s = 300

        centralNewIRK.irk = irk 

        error = self.driver.ble_gap_privacy_set(centralNewIRK)

       error, centralAdd = self.driver.ble_gap_addr_get()

       print(centralAdd.addr_type)

 I am not sure which part of the library doesn't work so well the set or the get but I don't see what I could do wrong since the code is very simple.

NB: when I set private_addr_type to BLEGapAddr.random_private_resolvable, an error is generated in to_c() of the class BLEGapPrivacyParams()  saying that the value should be an uint8_t so I have to set it to the value 0x02 every time which is strange too

I whish you could do the test and tell me what you get.

Best Regards

Imen 

[Einar Thorsrud]

Hi Imen,

The reason for this is that sd_ble_gap_addr_get() always returns the identity address (type BLE_GAP_ADDR_TYPE_PUBLIC or BLE_GAP_ADDR_TYPE_RANDOM_STATIC). You should use sd_ble_gap_adv_addr_get() to get the local address that is used in advertising packets (which can be any type).

Einar

[Imen]

Thanks for the reply!