custom nrf9160 board unable to connect : SIP version pb ?

RE: custom nrf9160 board unable to connect : SIP version pb ?

fgaultier — Wed, 10 Feb 2021 16:51:07 GMT

Hi Jonatan,

We finally solved our problem ! It seems well that that there is some SIP version + modem firmware version combination issue. As previously explained on our new board we had:

An nRF9160 SIP, version SICA B0 191102
Running latest firmware version 1.2.3

And we were not able to connect to any network.

Switching to older modem firmware version 1.1.0 solved the problem.

RE: custom nrf9160 board unable to connect : SIP version pb ?

fgaultier — Mon, 08 Feb 2021 15:46:32 GMT

Yes the SIM is from 1nce (IoT Flat Rate | Konnektivität für M2M und IoT Anwendungen | 1NCE) and it works fine on other HW.

We're not using AT_Client (no available UART on the board), but sending AT commands from our firmware in debug mode.

RE: custom nrf9160 board unable to connect : SIP version pb ?

JONATHAN LL — Mon, 08 Feb 2021 15:34:26 GMT

Hi,

AT%XMONITOR returning the values 4 and 0
indicated that it is not recognized by the network.
- 4 – Unknown (e.g. out of E-UTRAN coverage)
- 0 – Not registered. User Equipment (UE) is not currently searching for an operator to register to.

For +CEREG 4 is the same as %XMONITOR command, 4 – Unknown (e.g. out of E-UTRAN coverage).

Does the SIM work on other HW ? And you are testing with AT_Client ?

Regards,
Jonathan

RE: custom nrf9160 board unable to connect : SIP version pb ?

fgaultier — Mon, 08 Feb 2021 10:23:35 GMT

Hi Jonathan,

I tried again the AT commands including AT%XMONITOR.

The first response of AT%XMONITOR is 4 and the second is 0

Do you have an Idea ?

The complete results are below

AT%XSYSTEMMODE=1,0,0,1
OK
AT%XSYSTEMMODE?
%XSYSTEMMODE: 1,0,0,1
OK
AT+CFUN=1
OK
AT+CFUN?
+CFUN: 1
OK
AT+CGSN=1
+CGSN: "352656100353088"
OK
AT+CGMI
Nordic Semiconductor ASA
OK
AT+CGMM
nRF9160-SICA
OK
AT+CGMR
mfw_nrf9160_1.2.3
OK
AT+CEMODE?
+CEMODE: 2
OK
AT%XCBAND=?
%XCBAND: (1,2,3,4,5,8,12,13,14,17,20,25,26,28,66)
OK
AT+CMEE?
+CMEE: 0
OK
AT+CMEE=1
OK
AT+CNEC?
+CNEC: 0
OK
AT+CNEC=24
OK
AT+CGEREP?
+CGEREP: 0,0
OK
AT+CGDCONT?
OK
AT+CGACT?
OK
AT+CGEREP=1
OK
AT+CIND=1,1,1
OK
AT+CEREG=5
OK
AT+CEREG?
+CEREG: 5,4,"FFFE","FFFFFFFF",7,0,0,"00000000","00000000"
OK
AT%CESQ=1
OK
AT+CESQ
+CESQ: 99,99,255,255,255,255
OK
AT%XSIM=1
OK
AT%XSIM?
%XSIM: 1
OK
AT+CPIN?
+CPIN: READY
OK
AT+CPINR="SIM PIN"
+CPINR: "SIM PIN",3
OK
AT+CIMI
901405101055802
OK
AT+CGDCONT?
OK
AT%XMONITOR
%XMONITOR: 4
OK
AT%XMONITOR
%XMONITOR: 0

RE: custom nrf9160 board unable to connect : SIP version pb ?

JONATHAN LL — Fri, 05 Feb 2021 14:54:00 GMT

Ok, sounds good. If you dont want to share the files publicly we can make this case private or you can create a new one, whatever you prefer.

Regards,
Jonathan

RE: custom nrf9160 board unable to connect : SIP version pb ?

fgaultier — Fri, 05 Feb 2021 14:31:16 GMT

Hi,

Thanks for your answer Jonathan.

The RF part on the new board is fine; we were able to connect to LTE-M from the older board using the RF part (antenna and matching circuit) of the newer board.

I will check the result of AT%XMONITOR on monday morning (I'm teleworking today and have no access to our lab currently), and if we cannot figure anything from it, I will share schematic and HW files with you.

Best regards,

Franck

RE: custom nrf9160 board unable to connect : SIP version pb ?

JONATHAN LL — Fri, 05 Feb 2021 13:04:12 GMT

Hi,

[quote user=""]measurements on the antenna PIN show nothings go out[/quote]

Have you measured on both the working and not working HW ?

[quote user=""] schematics related to NRF9160 are essentially the same as on the older version[/quote]

Is the RF part the same ? have there ben any changes in the PCB layout?
Can you possibly share the schematic and the PCB files ?

Might solve this without having top share schematic and HW files

You have used the same SIM and know it works.

What does AT%XMONITOR return ?

Regards,
Jonathan