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...

[MJD093]

If you are in fact running the asset_tracker application, please see the following lines in lte_lc.c
https://github.com/NordicPlayground/fw-nrfconnect-nrf/blob/master/drivers/lte_link_control/lte_lc.c#L46-L48
These lines indicate that you need to add an additional line to your prj.conf file to configure the device to NB-IoT in that application. (or any application that directly uses LTE Link Control (lte_lc) to handle modem control)

Try adding into the prj.conf file:

CONFIG_LTE_NETWORK_MODE_NBIOT=y

[SergioT]

It is the Asset tracker

[MJD093]

Right, the asset_tracker requires human interaction to pair the device to the nrf cloud. If you want to simply test if the kit can connect to the NB-IoT network, you will need to swap application to the at_client application.

Otherwise, try adding that line to prj.conf for the asset_tracker and then review the manual on pairing your nRF9160 DK to nRF Cloud. At which point I can not help as I have never connected to nRF Cloud as I do not have access to an NB-IoT network that can utilise MQTT protocols as needed for the asset_tracker application.

[SergioT]

I added the line in prj.conf but I see no change in the project: it still is in LTE mode. Also, I can't find the file in SES, which I would expect. Where is it included?

I searched for CONFIG_LTE_NETWORK_MODE_LTE_M in the whole ncs folder and I changed all occurrences to CONFIG_LTE_NETWORK_MODE_NBIOT. Now the unit runs in NB-IoT mode but it resets when connection is achieved. What CGDCONT settings should be done? I beleive it is necessary to define where and how we should connect to... am I wrong? 

[MJD093]

/path/to/ncs/nrf/drivers/lte_link_control/lte_lc.c