specific unique id for device detection

[capricorn]

Hi

I am looking for unique id of nrf52. is there any to set or generate unique id throughout all nrf52 devices.

Thanks & Regards Paramvir Singh

[Sigurd]

Hi,

You have the DEVICEID registers in FICR(Factory information configuration registers). The 2 DEVICEID registers each contain a 64 bit unique device identifier.

If you want to read and print the DEVICEID in the FICR register, you can do it like this:

NRF_LOG_INFO("DEVICEID0: %08X\n", NRF_FICR->DEVICEID[0]);
NRF_LOG_INFO("DEVICEID1: %08X\n", NRF_FICR->DEVICEID[1]);

[erltot]

Is there any relation towards the MAC address you see when you use BLE ? Can you also use that as a unique identifer?

[Sigurd]

Hi Erlot,

The DEVICEADDR registers are used for that(48 bit device address). See this answer on how the MAC address is derived from the DEVICEADDR .

[erltot]

Thanks! :)

[awneil]

Sigurd said:

The 2 DEVICEID registers each contain a 64 bit unique (sic) device identifier

No!  the DEVICEID is not unique - it is random!

See: https://devzone.nordicsemi.com/f/nordic-q-a/49664/deviceid-is-unique---but-is-it-random/198038#198038