nRF9160 DK software update

[SergioT]

I used SES and wrote a printf message at main entrance: when I run in nRF Connect I can see the message that I wrote just after I press the RESET button (OK). Still, as I can't get a connection to NB-IoT, I decided to roll back to the mfw_nrf9160_0.7.0-alpha version: I flashed the board but when I run it I still see my printf message, meaning that still the old code is running.

Can you explain? 

I am still not able to connect although I could before trials with SES...

[SergioT]

Does the application at_client work in NB-IoT? Can I connect to nRF Cloud with it?

[MJD093]

The at_client example allows you to test the Development Kit's connectivity to the NB-IoT network. It is the first stage of designing any NB-IoT device, as it allows you to test a device's ability to attach to the network, the network signal strength and if possible, sending test data to a server (not possible with NB-IoT using Nordic's at_client example but I have seen other modules that can do this via AT commands).

You should run this example program first, then move to connecting to the nRF Cloud once you know for certain that the radio connection of your device is working as expected. It works the same way you have mentioned in the beginning of this question, via AT commands such as CFUN and XSYSTEMMODE, except this is the correct program to enter them.

You will not be able to connect to the nRF Cloud using the at_client example program.