Provisioning using nRF Connect for Desktop

You can use the certificates/device-<deviceId>.json file with Certificate manager in LTE Link Monitor (an application implemented as part of nRF Connect for Desktop), to provision the certificate to the device.

Certificate manager uses AT commands to write the certificate information to the secure storage of the modem. You need to program your device with a firmware that has the AT command host enabled.

To provision the certificate using LTE Link Monitor, complete the following steps:

1. Program the AT Client sample using the Programmer application (part of nRF Connect for Desktop).

   

   nRF Connect for Desktop Programmer

   Use the following files:

   • Thingy:91 - thingy91_at_host_increased_buf.hex

   • nRF9160 DK - 91dk_at_host_increased_buf.hex

   For instructions, see programming the firmware.

2. Open nRF Connect for Desktop and launch the LTE Link Monitor application.

   

   nRF Connect for Desktop - LTE Link Monitor

3. Select the device in the top left drop-down menu.

   Note

   Make sure that the selected device is connected directly, not through the debugger.

4. Click Certificate manager.

5. Drag and drop the JSON file into the Certificate manager window or select the file using the Load from JSON button.

   Note

   Change the security tag to 42. The modem can hold multiple credentials, and the default security tag 16842753 is reserved for nRF Connect for Cloud credentials.

   

   LTE Link Monitor - Certificate manager

6. Click Update certificates and wait until the operation completes.