No network interface to work with on nrf9160

[dpape]

Hello,

I followed the getting started guide but the kit can't connect. I'm getting this error:

net_if.net_if_init: There is no network interface to work with!

Is this a known bug, how can i fix it? Or is there a hardware issue?

Kind regards,

Daan Pape

[Filip Skorup]

Same issue in Croatia. Tried 3 different sim cards (iBasis, T-Mobile & Tele2) and no success. LTE link monitor shows all red statuses (UART, modem, ...). I’m connecting DK on macbook pro over usb to usb-c adapter. Updated firmware and uploaded at_client sample code but after that no response from DK on AT commands.

[Filip Skorup]

Ok i realized that i'm not updating modem firmware, getting timeout error.

And LTE link monitor app is definetly not working ok. When i connect DK to mac and start LTE monitor app, in device selection drop down i have 3 ports. All statuses are red.

If i switch power off and on, LTE link monitor app show only one device and i can't connect to that one device.

This behavior is present from first time when i started DK out of the box and after getting "No network interface to work with" error and messing with firmware and at_client i don't get any response from modem any more.

[f0corner]

I am experiencing pretty much the same thing. I am located in New Brunswick, Canada. Out of the box, the asset tracker demo did not work with the iBasis SIM. I tried with a Twilio SIM and it did not work either. I successfully installed the new modem firmware. Then I followed the "get started tutorial" and flashed the board with the "asset tracker" project (which I built using SES): still not working. Finally, I tried the "at_client" project (again built using SES), and all badges are red (i.e. UART, Modem, UICC, LTE; and PDN is gray) in nRF Connect for Desktop (LTE Link Monitor app).

[_toto_]

With the "at_client" project I had to do the following:

- In LTE Link Monitor make sure you have closed the device.
- Flip the power switch on the DK ON->OFF->ON
- In LTE Link Monitor select the device
- Hit the RESET button on the DK
- Send 'AT+CFUN?' twice. After the first command I just get '+CFUN: 4' and 'AT+CFUN=1' seems to be sent automatically. The second time I send the command a lot of other commands are also sent. For me at least UART, MODEM and UICC turns green and LTE are flashing yellow. Unfortunately it doesn't connect.

[f0corner]

_toto_,

I followed the procedure you are proposing and it worked. I am now able to interact with the AT client firmware using the "LTE Link Monitor" app. Now, both the "Modem" and "UICC" badges (in LTE Link Monitor) are green, and the "LTE" badge flashes yellow after sending "AT+CFUN?". I am still unable to connect to a network though.

Thank you for your help. I really appreciate. A+

[Filip Skorup]

Ok, i successfully updated firmware and after that something is happening. But still no connection. iBasis sim card always goes to roaming and that is normal, and LTE monitor displays network (sometimes) on which iBasis sim card try to connect, but still no connection.

If i try to force network search (AT+COPS=?) it failes and returns following error:

Network search failed: Error: AT+COPS=? failed: phone failure

On LTE monitor chart i can see that modem found available network but automaticaly deregistered. This happens with all my 3 sim cards: iBasis, Tele2 and T-Mobile (T-Hrvatski Telekom).

Today i will dig throught AT Commands documentation and try to manualy connect to something

[TLloydUom]

Same thing is happening here in the UK even after trying a few different sim providers.

[bjorn-spockeli]

TLloydUom: Could you post a screenshot of the LTE link monitor after you have followed the approach described by _toto_:

- In LTE Link Monitor make sure you have closed the device.
- Flip the power switch on the DK ON->OFF->ON
- In LTE Link Monitor select the device
- Hit the RESET button on the DK
- Send 'AT+CFUN?' twice. After the first command I just get '+CFUN: 4' and 'AT+CFUN=1' seems to be sent automatically. The second time I send the command a lot of other commands are also sent. For me at least UART, MODEM and UICC turns green and LTE are flashing yellow.

[TLloydUom]

Hi Bjorn, thanks for responding.  After carrying out those steps I get the same outcome.  Please see the attached screenshot.

[TLloydUom]

I should add that I also updated the firmware too before I tried this.

[bjorn-spockeli]

@tlloyduom: Is this with the iBasis SIM, another SIM or do you see the same result for both? Have you verified that there is LTE-M coverage in your area? The UK isnt listed on iBasis's site wrt to coverage, see http://iot.ibasis.com/network-coverage/. 

[TLloydUom]

bjorn-spockeli My colleague and I have tried this with the ibasis sim, as well as giff gaff, Three and plusnet.  None of them worked.  The giff gaff sim was from my personal phone which showed up as having 4G/LTE coverage.