NRF Cloud & Developer account

[Alskandar]

Hi,

I would like some clarification regarding the use of a developper account.
I generated a Service Evaluation Token, tested with some queries, everything works.

Now, i want to generate JWTs for each of my devices.
I provisioned the device on the account ( like explained https://docs.nrfcloud.com/Devices/Security/JWT.html ), it's ok.

How then to retrieve JWT ?
On jwt.io, i fill in the different fields (uuid, ca private key and device public key), the signature isn't verified (i deduce that the JWT is false).

I tried ti generate directly on the device a JWT (AT%JWT), but if i use it (with postman, i get an error 40100, this ok with SET).

Is it possible with a developper account to perform location requests (gps) with JWTs for each device ?

Thanks for your help

PS: i'm not using a nRF9160 DK but an Icarus Board (i can do tests with a DK however).

[justin]

How then to retrieve JWT ?

You can use the AT command directly, but you must ensure that the parameters are correct.
See https://developer.nordicsemi.com/nRF_Connect_SDK/doc/latest/nrf/libraries/networking/nrf_cloud.html#c.nrf_cloud_jwt_generate for generating JWTs to be used with the nRF Cloud REST API.
It will create the JWT using the private key in the configured modem sec tag (CONFIG_NRF_CLOUD_SEC_TAG).

Note that you do not need to both provision your device AND register a public key. See the use case explanation in https://api.nrfcloud.com/v1#tag/IP-Devices/operation/RegisterPublicKeys.
The private key stored in your device must correspond to the public key provided to nRF Cloud.
When creating a JWT on the device, you must use the sec tag where that private key is stored.

Have a look at the following sample for an example of using REST locations services from the device:
https://developer.nordicsemi.com/nRF_Connect_SDK/doc/latest/nrf/samples/cellular/nrf_cloud_rest_cell_location/README.html

The function nrf_cloud_rest_location_get does the REST API call and the JWT is generated automatically.

Is it possible with a developper account to perform location requests (gps) with JWTs for each device ?

Yes, developer accounts get 500 requests per month.
https://docs.nrfcloud.com/AccountAndTeamManagement/Plans/PlanOverview.html?h=plans#developer

[Alskandar]

Thanks, i use jwt_generate with parameters, it works fine ! All is good !

[Øyvind]

That is great news! 

-Øyvind