Azure IoT Hub certificates (CA, Client, Private key, Pre-shared key, PSK identity, security tag) don't seem to be updating in the Modem

[Marty]

Azure IoT Hub certificates (CA, Client, Private key, Pre-shared key, PSK identity, security tag) don't seem to be updating in the Modem
Using nrf9160dk PCA10090, nrf9160dk_fw_2021-10-20_d29f1dde.zip, ..\v1.7.0\nrf\samples\nrf9160\azure_iot_hub\build_nrf9160dk_nrf9160_ns, LTE Link Monitor V2.0.0
Registers don't look updated after the AT%CMNG=0... commands.   Are these location Write only?

AT%CMNG=0,16842753,0,"3333"
OK
AT%CMNG=0,16842753,1,"4444"
OK
AT%CMNG=0,16842753,2,"5555"
OK
AT%CMNG=0,16842753,3,"6666"
OK
AT%CMNG=0,16842753,4,"7777"
OK
AT%CMNG=1
%CMNG: 0,6,"0606060606060606060606060606060606060606060606060606060606060606"
%CMNG: 16842753,0,"0000000000000000000000000000000000000000000000000000000000000000"
%CMNG: 16842753,1,"0101010101010101010101010101010101010101010101010101010101010101"
%CMNG: 16842753,2,"0202020202020202020202020202020202020202020202020202020202020202"
%CMNG: 16842753,3,"0303030303030303030303030303030303030303030303030303030303030303"
%CMNG: 16842753,4,"0404040404040404040404040404040404040404040404040404040404040404"
%CMNG: 4294967293,10,"0A0A0A0A0A0A0A0A0A0A0A0A0A0A0A0A0A0A0A0A0A0A0A0A0A0A0A0A0A0A0A0A"
%CMNG: 4294967292,11,"0B0B0B0B0B0B0B0B0B0B0B0B0B0B0B0B0B0B0B0B0B0B0B0B0B0B0B0B0B0B0B0B"

[Charlie]

Hi Marty,

You can read with a command like AT%CMNG=2, 16842753,0.

Please also pay attention that "Reading types 1, 2, 3, and 10 are not supported." as mentioned on nRF91 AT document. The modem only allows one-direction writing for these types.

Best regards,

Charlie

[Marty]

Thank you Charlie.  But, doesn't the below statement in the documentation contradict the results?

infocenter.nordicsemi.com/index.jsp

The following command example lists all stored credentials:

AT%CMNG=1
%CMNG: 12345678, 0, "978C...02C4"
%CMNG: 567890, 1, "C485...CF09"
%CMNG: 123, 2, "92E1...8AC8"
%CMNG: 654321, 3, "E0C9...511D"
OK

[Charlie]

Yes, they are quite misleading, I have reported this document bug to the author.

Best regards,

Charlie