Recommended nRF9160 modem FW version and SDK version for SICA B0 Custom board

[Mark Smalley]

I have an nRF9160 custom board in development. Parts on the board turn out to be Revision 1 (B0) with 1.1.0 modem FW installed. Original application code was done with nRFConnect SDK 1.6.1 and on a B1 SIP (nrf9160feather).

In order to progress development on these "prototypes" what would be the recommend version of modem FW to upgrade to and what version nRF connect SDK would be recommend?

Future Pre-Production builds will use the SICA B1 device (or whatever is latest0 and latest SDK but just looking to bridge the gap during development.

[Simonr]

Hi

This information should be available from our nRF9160 compatibility matrix here. For revision 1 (B0), the latest supported modem firmware version is v1.1.4, and the latest supported nRF Connect SDK is v1.5.2, so these would be the ones to use.

For future devices, the latest available version will indeed be the recommended one.

Best regards,

Simon

[bluebeam]

Hi,

Can you point me to which section of the document you mentioned that can tell me which modem fw revision to use? I can;t seem to find it.

I'm in a similar situation. My board has B0A 9160. But I already upgraded the modem firmware to 1.3.3. Will that be an issue? Actually I do have an issue. I just don't know why yet: after I call lte_lc_init(), the processor resets. I'm not sure if this is caused by incompatibility or something else. This is on new custom board so it could be other hardware related issue.

Before, I was using 9160DK board for prototype. It works fine. The combination is:

B1A, mfw 1.3.1, SDK1.7.1

Now with the custom board, the combinations is:

B0A, mfw 1.3.3, SDK1.7.1

I also notice the mfw1.3.3 release notes says it's not recommended to downgrade to 1.2 or 1.1 after upgrading to 1.3. So am I stuck here?

Any thoughts?

Thanks for help!

[Mark Smalley]

Hi,

I too had difficulty finding the modem to SDK relationships originally, turns out it is in "mobile network operator certifications" section under the "compatibility matrix link" Simon gave above. Scroll down to the network operator of interest.

Mark

[bluebeam]

Oh I see. Thanks.

That explains what has been certified. I guess I need to figure out if there's any 'minimal' requirements for the HW+MFW+SDK combination.