nRF9160 dk get hardware id

[Vlad T]

Hello,

Is it possible to read the hardware ID of a nRF9160 from a non secure firmware?

Best regards,

Vlad

[Martin Lesund]

Hi Vlad, 
What do you mean by hardware ID?

If you mean the information you can get by issuing the AT command AT%HWVERSION, then yes that is possible to get.
Just open a AT socket and issue the command in your FW that runs in the non-secure area.

[Vlad T]

Hi Martin,

Thank you for your quick reply.

I want to read the DEVICEID register from the FICR peripheral. Unfortunately for me the ncs defines only a secure definition for the FICR registers so it can't be read by a non secure firmware.

Is there a way to get the information form DEVICEID? If not is there another unique id register that I can read?

[Martin Lesund]

Hi Vlad,

I would recommend using the IMEI instead, since that is also unique for each nRF9160 SiP.
This can be gathered from the AT command AT+CGSN.

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Since the FICR structure (NRF_FICR_S) structure is secure only.

Any access to this region must be done using a trustzone call.

Add the CONFIG_SPM_SECURE_SERVICES=y into your prj.conf

and use the spm_request_read to read FICR.
You can use the Secure Services sample as reference.