I have a question about Bluetooth MAC address.

RE: I have a question about Bluetooth MAC address.

hiroyasu — Wed, 19 Apr 2023 02:17:15 GMT

Switching between random and normal mac address?

The above method worked for me.
thank you very much.

RE: I have a question about Bluetooth MAC address.

hiroyasu — Tue, 18 Apr 2023 08:46:32 GMT

Mr. Vidar Berg

First, sd_ble_gap_address_get(), sd_ble_gap_address_set()
was wrong.
Correctly sd_ble_gap_addr_get(), sd_ble_gap_addr_set()
was.

Then I checked the link.

What I want to achieve is to display the MAC address displayed under the device in the android app nRFConnect in the iOS app as well.
For that I tried the following:

①
sd_ble_gap_addr_get(&device_addr)

②
macaddr[0] = *((uint32_t *)0x100000A4);
macaddr[1] = *((uint32_t *)0x100000A8);
mcp = (uint8_t *)(&macaddr[0]);
for(i=0;i<6;i++)
{
caddr.addr[i] = *mcp++;
}

③
NRF_FICR->DEVICEADDR[0];
NRF_FICR->DEVICEADDR[0]>>8;
NRF_FICR->DEVICEADDR[0]>>16;
NRF_FICR->DEVICEADDR[0]>>24;
NRF_FICR->DEVICEADDR[1];
NRF_FICR->DEVICEADDR[1]>>8;

However, none of them are different from the MAC address displayed in the android app nRFConnect.
Additionally, the value changes each time you access it.
I understand this is because it is "BLE_GAP_ADDR_TYPE_RANDOM_STATIC".
So how can I get the MAC address displayed on nRFConnect?

RE: I have a question about Bluetooth MAC address.

hiroyasu — Tue, 18 Apr 2023 00:31:51 GMT

Mr. Vidar Berg

thank you for your reply.

It seems to be possible by using FICR->DEVICEADDR from the link destination.

RE: I have a question about Bluetooth MAC address.

Vidar Berg — Mon, 17 Apr 2023 08:16:03 GMT

Hello,

Are you seeing this with any of our SDK examples? sd_ble_gap_address_get() should always return the same address unless your application is calling sd_ble_gap_address_set() at some point to override the default HW address (is a random static address). There is no public address provisioned on the chip.

You can read more about the different address type in this post: bluetooth address : built-in or random ? .

Best regards,

Vidar