nRF9160DK HWID

[bbslhb]

Hello.

There is a label on the back of the nRF9160DK.

I can find "HWID: FF:6A:B3:34:69:AC" on the label.

nRF connect can get the same string: "FF:6A:B3:34:69:AC" when running BLE with nRF9160DK.

So the HWID on the lable is related to nRF52840 chip on nRF9160DK.

My question is:

1. How thie HWID generated? Is there a official pdf file for reference?

2. We can get HWID through nRF connect or check the label on nRF9160DK. How to output HWID through UART?

Thanks.

[Sigurd]

Hi,

bbslhb said:

1. How thie HWID generated? Is there a official pdf file for reference?

It's derived from the NRF_FICR->DEVICEADDR[], which are randomly generated in production. This "HWID" on the label is the Bluetooth address. See this post.

bbslhb said:

How to output HWID through UART?

	printk ("[HWID]:%04X%08X", (uint32_t)(NRF_FICR->DEVICEADDR[1]&0x0000FFFF)|0x0000C000,
                               (uint32_t)NRF_FICR->DEVICEADDR[0]);

[MJD093]

Hi Sigurd,

Are you sure that's for nRF9160?

I tried that snippet and it didn't like that, NRF_FICR is undefined. Delving deeper into the FICR, I can see in nrf9160.h there is a struct for NRF_FICR_S which can be followed down to NRF_FICR_S->INFO.DEVICEID[2]. This makes more sense as this is what is reflected in the nRF9160 OPS for FICR.

However I get hard faults when trying to print [0] or [1] of the DEVICEID and just printing NRF_FICR_S->INFO.DEVICEID gives a 6 digit hexadecimal value which is too small?

[Sigurd]

MJD093 said:

Are you sure that's for nRF9160?

This is for the nRF52840 that is located on the nRF9160-DK(PCA10090).