I cannot delete all certificates Asset Tracker 2

[jfpastrana]

Hello,

I am using Asset Tracker 2 application through AWS Cloud, instead of NRF Cloud. I have already downloaded my certificates and I want to load them. However, I included by mistake the following entries:

And I am not able to delete them:

Is there any other way to flash this memory?

Best regards

[Øyvind]

Hello, 

The error CME ERROR 514 means No access. Applies to read, write, and delete, as according to AT%CMNG documentation. From your screenshot it looks like your device is set to AT+CFUN=1. Can you please retry the delete function with AT+CFUN=0?

Kind regards,
Øyvind

[Øyvind]

Also, the two certificates are found on all devices, and probably this is also why you are not able to delete these.

10 – Nordic identity root CA. Root CA for Nordic identity server.

11 – Nordic base public key. Used for ownership key provisioning message signature verification.

[Øyvind]

As you have deleted the nRF Cloud sec_tag, you will not be able to connect nRF Cloud. What version of nRF Connect SDK are you using? Make sure that you are following the documentation for cloud module in the Asset Tracker v2.

jfpastrana said:

I thing that It is a bit strange, because have other board and it displays the certificates as follows:

This has to do with the modem fw version you are running. For modem fw v1.3.1, as you are running, the output is correct.

jfpastrana said:

But I still have problems with the connection. I followed all the steps defined in the guide, also included some configuration:

From the log output you have several Signal quality notification %CESQ: 99,99,255,255,255,255, where the two last 255 indicates that you have bad signal. Where are you testing your device? Is this a DK, Thingy:91 or a customer board?

[jfpastrana]

Hello,

I do not have strong signal strength as you said.

I just flash from defaults the board using the version 1.3.3. And I recover all the certificates except the NRF Cloud ones, 

Is there any way to recover the certificates which has the ID "16842753"?

is there any compatibility problem among certificates? 

Regards

[Øyvind]

jfpastrana said:

Is there any way to recover the certificates which has the ID "16842753"?

No, the certificates that you delete will be deleted, and is not possible to recover from the modem. 16842753 is the sec_tag for nRF Cloud which our devices come preprovisioned with. In order to restore these certificates, you will need to follow the steps under Securely generating credentials on the nRF9160 in our nRF Cloud documentation.

jfpastrana said:

is there any compatibility problem among certificates? 

I'm not sure I understand your question. The certificates are generated for each device.

Kind regards,
Øyvind

[jfpastrana]

Hello,

Thank you for your answer, I was able to restore the certificates, now I can see again the receiving data in NRF Cloud.

What I mean with my question is, if there is any problem to have configure several certificates in the same device for different clouds.

Now my device looks as follows:

I do not know if I would have any conflict for having two certificates of type 0, 1, and 2. I suppose that no, just to be sure.

Regards

[jfpastrana]

Hello,

Finally taking as a reference this other post https://devzone.nordicsemi.com/f/nordic-q-a/83159/asset-tracker-v2-application-how-to-subscribe-to-non-aws-specific-topic, I solved my issues.

Thank you very much for the support