nrf9160 mfw 1.3.5 CEREG: 2 Not registered is unrecoverable.

[Replay]

EDIT:

After getting more logging data. I see that the connection is established again seconds after unregistered occurred.

The problem is when Resolving IP address for the Azure IoT Hub: <err> azure_iot_hub_mqtt: getaddrinfo() failed, error -2

Hi,

I'm have a problem where if the CEREG notification is status 2 (Not registered, but UE is currently trying to attach or searching an operator to
register to) I'm not able to establish a connection again.

I have a project where the system is running perfectly for up to hours 58+ hours. Sending information to Azure IoT Hub each minute.

When the CEREG changes to stat 2 afterwords no more message transmission are successful.

How to recover from a CEREG: 2?

Info:
Custom board using: nrf9160
Modem FW: 1.3.5
NCS: 2.2.0

Thank you in advance.

BR. Replay

[Replay]

A fix that seems to work, when trying to reconnect from the user application. Create a static struct azure_iot_hub_config variable to store the hostname and device id in. Reuse this struct when trying to reconnect from the user application.