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[LTE link monitor] Try to connect to NB IoT network

ActiTAG

Hello, 

I received the Thingy not too long ago. Now that I've run some samples, it's time to use the NB network. I flash the AT_cmd sample. I open LTE Link Monitor to see the AT commands and send them. After the cmd sent automatically, the modem seems to be stuck, doesn't answer anymore and I see this :

After manually sending AT+CGDCONT=1, "IP, "iot.1nce.net", sometimes after 10 minutes, it unblocks and I see this:


I am in Germany with a 1nce SIM card, I have already managed to use the NB network on another device with this SIM card.
I don't understand what's wrong, can you explain it to me please?

LOG : 

2021-02-25T08:56:19.816Z DEBUG modem >> AT+CFUN?
2021-02-25T08:56:19.850Z DEBUG modem << +CFUN: 1
2021-02-25T08:56:19.853Z DEBUG modem << OK
2021-02-25T08:56:19.876Z DEBUG modem >> AT+CGSN=1
2021-02-25T08:56:19.886Z DEBUG modem << +CGSN: "352656101500240"
2021-02-25T08:56:19.887Z DEBUG modem << OK
2021-02-25T08:56:19.891Z DEBUG modem >> AT+CGMI
2021-02-25T08:56:19.900Z DEBUG modem << Nordic Semiconductor ASA
2021-02-25T08:56:19.902Z DEBUG modem << OK
2021-02-25T08:56:19.906Z DEBUG modem >> AT+CGMM
2021-02-25T08:56:19.916Z DEBUG modem << nRF9160-SICA
2021-02-25T08:56:19.918Z DEBUG modem << OK
2021-02-25T08:56:19.922Z DEBUG modem >> AT+CGMR
2021-02-25T08:56:19.930Z DEBUG modem << mfw_nrf9160_1.2.3
2021-02-25T08:56:19.932Z DEBUG modem << OK
2021-02-25T08:56:19.934Z INFO Nordic Semiconductor ASA nRF9160-SICA [mfw_nrf9160_1.2.3] SerNr: 352656101500240
2021-02-25T08:56:19.935Z DEBUG modem >> AT+CEMODE?
2021-02-25T08:56:19.942Z DEBUG modem << +CEMODE: 0
2021-02-25T08:56:19.944Z DEBUG modem << OK
2021-02-25T08:56:19.958Z DEBUG modem >> AT%XCBAND=?
2021-02-25T08:56:19.972Z DEBUG modem << %XCBAND: (1,2,3,4,5,8,12,13,17,19,20,25,26,28,66)
2021-02-25T08:56:19.976Z DEBUG modem << OK
2021-02-25T08:56:20.006Z DEBUG modem >> AT+CMEE?
2021-02-25T08:56:20.014Z DEBUG modem << +CMEE: 1
2021-02-25T08:56:20.017Z DEBUG modem << OK
2021-02-25T08:56:20.023Z DEBUG modem >> AT+CNEC?
2021-02-25T08:56:20.033Z DEBUG modem << +CNEC: 24
2021-02-25T08:56:20.037Z DEBUG modem << OK
2021-02-25T08:56:20.041Z DEBUG modem >> AT+CGEREP?
2021-02-25T08:56:20.049Z DEBUG modem << +CGEREP: 1,0
2021-02-25T08:56:20.051Z DEBUG modem << OK
2021-02-25T08:56:20.056Z DEBUG modem >> AT+CIND=1,1,1
2021-02-25T08:56:20.065Z DEBUG modem << OK
2021-02-25T08:56:20.070Z DEBUG modem >> AT+CEREG=5
2021-02-25T08:56:20.077Z DEBUG modem << OK
2021-02-25T08:56:20.088Z DEBUG modem >> AT+CEREG?
2021-02-25T08:56:20.102Z DEBUG modem << +CEREG: 5,4,"FFFE","FFFFFFFF",9,0,0,"00000000","00000000"
2021-02-25T08:56:20.105Z DEBUG modem << OK
2021-02-25T08:56:20.119Z DEBUG modem >> AT%CESQ=1
2021-02-25T08:56:20.126Z DEBUG modem << OK
2021-02-25T08:56:20.135Z DEBUG modem >> AT+CESQ
2021-02-25T08:56:20.149Z DEBUG modem << +CESQ: 99,99,255,255,255,255
2021-02-25T08:56:20.154Z DEBUG modem << OK
2021-02-25T08:56:20.169Z DEBUG modem >> AT%XSIM=1
2021-02-25T08:56:20.182Z DEBUG modem << OK
2021-02-25T08:56:20.186Z DEBUG modem >> AT%XSIM?
2021-02-25T08:56:20.192Z DEBUG modem << %XSIM: 1
2021-02-25T08:56:20.195Z DEBUG modem << OK
2021-02-25T08:56:20.207Z DEBUG modem >> AT+CPIN?
2021-02-25T08:56:20.221Z DEBUG modem << +CPIN: READY
2021-02-25T08:56:20.225Z DEBUG modem << OK
2021-02-25T08:56:20.241Z DEBUG modem >> AT+CPINR="SIM PIN"
2021-02-25T08:56:20.258Z DEBUG modem << +CPINR: "SIM PIN",3
2021-02-25T08:56:20.260Z DEBUG modem << OK
2021-02-25T08:56:20.271Z DEBUG modem >> AT+CIMI
2021-02-25T08:56:20.288Z DEBUG modem << 901405101052607
2021-02-25T08:56:20.290Z DEBUG modem << OK
2021-02-25T08:56:20.291Z INFO IMSIdentity: 901405101052607
2021-02-25T08:56:30.419Z DEBUG modem >> AT+COPS=?
2021-02-25T08:57:26.627Z DEBUG modem << %CESQ: 67,3,25,3
2021-02-25T08:57:26.634Z DEBUG modem << +CEREG: 2,"C38C","002580CF",9,0,0,"11100000","11100000"
2021-02-25T08:57:27.054Z DEBUG modem << +CNEC_ESM: 111,0
2021-02-25T08:57:27.059Z DEBUG modem << +CNEC_EMM: 15
2021-02-25T08:57:27.063Z DEBUG modem << +CEREG: 4,"C38C","002580CF",9,0,15,"11100000","11100000"
2021-02-25T08:57:27.799Z DEBUG modem << %CESQ: 255,0,255,0
2021-02-25T08:57:27.804Z DEBUG modem << +CEREG: 4,"FFFE","FFFFFFFF",9,0,15,"11100000","11100000"
2021-02-25T08:57:30.682Z DEBUG modem << %CESQ: 69,3,24,3
2021-02-25T08:57:30.687Z DEBUG modem << +CEREG: 4,"C38C","002580CF",9,0,15,"11100000","11100000"
2021-02-25T08:57:49.298Z DEBUG modem << %CESQ: 70,3,29,4
2021-02-25T09:00:12.656Z DEBUG modem << %CESQ: 65,3,26,3
2021-02-25T09:00:32.453Z INFO Modem port is closed
2021-02-25T09:00:33.210Z INFO Modem port is opened
2021-02-25T09:00:33.216Z DEBUG modem >> AT+CFUN?
2021-02-25T09:01:20.511Z DEBUG modem << +CME ERROR: 0
2021-02-25T09:01:56.562Z DEBUG modem >> AT+CFUN?
2021-02-25T09:01:56.570Z DEBUG modem << +CME ERROR: 0
2021-02-25T09:01:56.572Z ERROR Error: AT+CFUN?
failed: phone failure
2021-02-25T09:02:15.292Z DEBUG modem >> AT+CFUN=1
2021-02-25T09:02:15.306Z DEBUG modem << OK
2021-02-25T09:02:16.442Z DEBUG modem >> AT+CFUN?
2021-02-25T09:02:16.457Z DEBUG modem << +CFUN: 1
2021-02-25T09:02:16.465Z DEBUG modem << OK
2021-02-25T09:02:16.467Z DEBUG modem >> AT+CGSN=1
2021-02-25T09:02:16.484Z DEBUG modem << +CGSN: "352656101500240"
2021-02-25T09:02:16.490Z DEBUG modem << OK
2021-02-25T09:02:16.500Z DEBUG modem >> AT+CGMI
2021-02-25T09:02:16.521Z DEBUG modem << Nordic Semiconductor ASA
2021-02-25T09:02:16.524Z DEBUG modem << OK
2021-02-25T09:02:16.531Z DEBUG modem >> AT+CGMM
2021-02-25T09:02:16.548Z DEBUG modem << nRF9160-SICA
2021-02-25T09:02:16.550Z DEBUG modem << OK
2021-02-25T09:02:16.562Z DEBUG modem >> AT+CGMR
2021-02-25T09:02:16.584Z DEBUG modem << mfw_nrf9160_1.2.3
2021-02-25T09:02:16.587Z DEBUG modem << OK
2021-02-25T09:02:16.588Z INFO Nordic Semiconductor ASA nRF9160-SICA [mfw_nrf9160_1.2.3] SerNr: 352656101500240
2021-02-25T09:02:16.594Z DEBUG modem >> AT+CEMODE?
2021-02-25T09:02:16.610Z DEBUG modem << +CEMODE: 0
2021-02-25T09:02:16.613Z DEBUG modem << OK
2021-02-25T09:02:16.618Z DEBUG modem >> AT%XCBAND=?
2021-02-25T09:02:16.639Z DEBUG modem << %XCBAND: (1,2,3,4,5,8,12,13,17,19,20,25,26,28,66)
2021-02-25T09:02:16.641Z DEBUG modem << OK
2021-02-25T09:02:16.645Z DEBUG modem >> AT+CMEE?
2021-02-25T09:02:16.660Z DEBUG modem << +CMEE: 1
2021-02-25T09:02:16.662Z DEBUG modem << OK
2021-02-25T09:02:16.665Z DEBUG modem >> AT+CNEC?
2021-02-25T09:02:16.682Z DEBUG modem << +CNEC: 24
2021-02-25T09:02:16.684Z DEBUG modem << OK
2021-02-25T09:02:16.686Z DEBUG modem >> AT+CGEREP?
2021-02-25T09:02:16.702Z DEBUG modem << +CGEREP: 1,0
2021-02-25T09:02:16.705Z DEBUG modem << OK
2021-02-25T09:02:16.712Z DEBUG modem >> AT+CIND=1,1,1
2021-02-25T09:02:16.728Z DEBUG modem << OK
2021-02-25T09:02:16.732Z DEBUG modem >> AT+CEREG=5
2021-02-25T09:02:16.746Z DEBUG modem << OK
2021-02-25T09:02:16.749Z DEBUG modem >> AT+CEREG?
2021-02-25T09:02:16.775Z DEBUG modem << +CEREG: 5,4,"C38C","002580CF",9,0,15,"11100000","11100000"
2021-02-25T09:02:16.777Z DEBUG modem << OK
2021-02-25T09:02:16.797Z DEBUG modem >> AT%CESQ=1
2021-02-25T09:02:16.812Z DEBUG modem << OK
2021-02-25T09:02:16.815Z DEBUG modem >> AT+CESQ
2021-02-25T09:02:16.834Z DEBUG modem << +CESQ: 99,99,255,255,29,68
2021-02-25T09:02:16.837Z DEBUG modem << OK
2021-02-25T09:02:16.850Z DEBUG modem >> AT%XSIM=1
2021-02-25T09:02:16.867Z DEBUG modem << OK
2021-02-25T09:02:16.875Z DEBUG modem >> AT%XSIM?
2021-02-25T09:02:16.892Z DEBUG modem << %XSIM: 1
2021-02-25T09:02:16.894Z DEBUG modem << OK
2021-02-25T09:02:16.901Z DEBUG modem >> AT+CPIN?
2021-02-25T09:02:16.917Z DEBUG modem << +CPIN: READY
2021-02-25T09:02:16.920Z DEBUG modem << OK
2021-02-25T09:02:16.932Z DEBUG modem >> AT+CPINR="SIM PIN"
2021-02-25T09:02:16.956Z DEBUG modem << +CPINR: "SIM PIN",3
2021-02-25T09:02:16.958Z DEBUG modem << OK
2021-02-25T09:02:16.963Z DEBUG modem >> AT+CIMI
2021-02-25T09:02:16.977Z DEBUG modem << 901405101052607
2021-02-25T09:02:16.980Z DEBUG modem << OK
2021-02-25T09:02:16.982Z INFO IMSIdentity: 901405101052607
2021-02-25T09:02:57.817Z DEBUG modem >> AT+CDGCONT=1,"IP","iot.1nce.net"
2021-02-25T09:02:57.836Z DEBUG modem << +CME ERROR: 0
2021-02-25T09:02:57.838Z ERROR Error: AT+CDGCONT=1,"IP","iot.1nce.net"
failed: phone failure
2021-02-25T09:03:07.561Z DEBUG modem >> AT+CGDCONT=1,"IP","iot.1nce.net"
2021-02-25T09:03:07.578Z DEBUG modem << OK
2021-02-25T09:05:20.147Z DEBUG modem << %CESQ: 15,0,0,0
2021-02-25T09:05:20.179Z DEBUG modem << +CEREG: 2,"D2FF","023C5009",9,0,15,"11100000","11100000"
2021-02-25T09:05:40.745Z DEBUG modem << +CGEV: ME PDN ACT 0,0
2021-02-25T09:05:40.764Z DEBUG modem << +CNEC_ESM: 50,0
2021-02-25T09:05:40.773Z DEBUG modem << +CEREG: 5,"D2FF","023C5009",9,,,"11100000","01011111"
2021-02-25T09:05:40.781Z DEBUG modem << +CIND: "service",1
2021-02-25T09:05:40.786Z DEBUG modem << +CIND: "roam",1
2021-02-25T09:05:40.804Z DEBUG modem >> AT+CGDCONT?
2021-02-25T09:05:40.836Z DEBUG modem << +CGDCONT: 0,"IP","iot.1nce.net","100.119.232.1",0,0
2021-02-25T09:05:40.844Z DEBUG modem << +CGDCONT: 1,"IP","iot.1nce.net","",0,0
2021-02-25T09:05:40.846Z DEBUG modem << OK
2021-02-25T09:05:40.866Z DEBUG modem >> AT+COPS=3,2
2021-02-25T09:05:40.875Z DEBUG modem << OK
2021-02-25T09:05:40.879Z DEBUG modem >> AT+CGACT?
2021-02-25T09:05:40.890Z DEBUG modem << +CGACT: 0,1
2021-02-25T09:05:40.895Z DEBUG modem << +CGACT: 1,0
2021-02-25T09:05:40.899Z DEBUG modem << OK
2021-02-25T09:05:40.914Z DEBUG modem >> AT+COPS?
2021-02-25T09:05:40.924Z DEBUG modem << +COPS: 0,2,"26201",9
2021-02-25T09:05:40.926Z DEBUG modem << OK
2021-02-25T09:05:40.940Z DEBUG modem >> AT%XCBAND
2021-02-25T09:05:40.959Z DEBUG modem << %XCBAND: 8
2021-02-25T09:05:40.961Z DEBUG modem << OK
2021-02-25T09:05:40.979Z DEBUG modem >> AT+CGDCONT?
2021-02-25T09:05:40.996Z DEBUG modem << +CGDCONT: 0,"IP","iot.1nce.net","100.119.232.1",0,0
2021-02-25T09:05:40.998Z DEBUG modem << +CGDCONT: 1,"IP","iot.1nce.net","",0,0
2021-02-25T09:05:41.000Z DEBUG modem << OK
2021-02-25T09:05:41.015Z DEBUG modem >> AT+CGACT?
2021-02-25T09:05:41.026Z DEBUG modem << +CGACT: 0,1
2021-02-25T09:05:41.028Z DEBUG modem << +CGACT: 1,0
2021-02-25T09:05:41.029Z DEBUG modem << OK
2021-02-25T09:05:45.072Z DEBUG modem << %CESQ: 19,0,6,0
2021-02-25T09:05:48.877Z DEBUG modem << %CESQ: 16,0,0,0
2021-02-25T09:05:56.837Z DEBUG modem << %CESQ: 21,1,6,0
2021-02-25T09:05:57.581Z DEBUG modem << %CESQ: 18,0,1,0
2021-02-25T09:06:01.165Z DEBUG modem << %CESQ: 21,1,6,0
2021-02-25T09:06:01.766Z DEBUG modem << %CESQ: 18,0,0,0
2021-02-25T09:06:12.175Z DEBUG modem << %CESQ: 13,0,0,0
2021-02-25T09:06:14.819Z DEBUG modem << %CESQ: 18,0,0,0
2021-02-25T09:06:16.351Z DEBUG modem << %CESQ: 255,0,255,0
2021-02-25T09:06:16.362Z DEBUG modem << +CEREG: 5,"FFFE","FFFFFFFF",9,,,"11100000","01011111"
2021-02-25T09:06:16.390Z DEBUG modem >> AT+COPS=3,2
2021-02-25T09:06:16.408Z DEBUG modem << OK
2021-02-25T09:06:16.414Z DEBUG modem >> AT+COPS?
2021-02-25T09:06:16.422Z DEBUG modem << +COPS: 0
2021-02-25T09:06:16.423Z DEBUG modem << OK
2021-02-25T09:06:16.428Z DEBUG modem >> AT%XCBAND
2021-02-25T09:06:16.441Z DEBUG modem << %XCBAND: 0
2021-02-25T09:06:16.443Z DEBUG modem << OK
2021-02-25T09:06:16.447Z DEBUG modem >> AT+CGDCONT?
2021-02-25T09:06:16.461Z DEBUG modem << +CGDCONT: 0,"IP","iot.1nce.net","100.119.232.1",0,0
2021-02-25T09:06:16.463Z DEBUG modem << +CGDCONT: 1,"IP","iot.1nce.net","",0,0
2021-02-25T09:06:16.463Z DEBUG modem << OK
2021-02-25T09:06:16.479Z DEBUG modem >> AT+CGACT?
2021-02-25T09:06:16.489Z DEBUG modem << +CGACT: 0,1
2021-02-25T09:06:16.491Z DEBUG modem << +CGACT: 1,0
2021-02-25T09:06:16.492Z DEBUG modem << OK
2021-02-25T09:06:18.826Z DEBUG modem << %CESQ: 19,0,0,0
2021-02-25T09:06:18.838Z DEBUG modem << +CEREG: 5,"D2FF","023C5009",9,,,"11100000","01011111"
2021-02-25T09:06:18.858Z DEBUG modem >> AT+COPS=3,2
2021-02-25T09:06:18.874Z DEBUG modem << OK
2021-02-25T09:06:18.877Z DEBUG modem >> AT+COPS?
2021-02-25T09:06:18.893Z DEBUG modem << +COPS: 0,2,"26201",9
2021-02-25T09:06:18.896Z DEBUG modem << OK
2021-02-25T09:06:18.909Z DEBUG modem >> AT%XCBAND
2021-02-25T09:06:18.931Z DEBUG modem << %XCBAND: 8
2021-02-25T09:06:18.934Z DEBUG modem << OK
2021-02-25T09:06:18.940Z DEBUG modem >> AT+CGDCONT?
2021-02-25T09:06:18.963Z DEBUG modem << +CGDCONT: 0,"IP","iot.1nce.net","100.119.232.1",0,0
2021-02-25T09:06:18.965Z DEBUG modem << +CGDCONT: 1,"IP","iot.1nce.net","",0,0
2021-02-25T09:06:18.967Z DEBUG modem << OK
2021-02-25T09:06:18.984Z DEBUG modem >> AT+CGACT?
2021-02-25T09:06:19.005Z DEBUG modem << +CGACT: 0,1
2021-02-25T09:06:19.007Z DEBUG modem << +CGACT: 1,0
2021-02-25T09:06:19.009Z DEBUG modem << OK
2021-02-25T09:06:24.786Z DEBUG modem << %CESQ: 14,0,0,0
2021-02-25T09:06:29.906Z DEBUG modem << %CESQ: 19,0,2,0
2021-02-25T09:06:37.586Z DEBUG modem << %CESQ: 12,0,0,0
2021-02-25T09:06:40.146Z DEBUG modem << %CESQ: 18,0,0,0

  • 0

    Hi,

    The log doesn't show when you started searching for a network, but at the start of the log, it has not yet found any signal:

    2021-02-25T08:56:20.102Z DEBUG modem << +CEREG: 5,4,"FFFE","FFFFFFFF",9,0,0,"00000000","00000000"
    2021-02-25T08:56:20.105Z DEBUG modem << OK
    2021-02-25T08:56:20.119Z DEBUG modem >> AT%CESQ=1
    2021-02-25T08:56:20.126Z DEBUG modem << OK
    2021-02-25T08:56:20.135Z DEBUG modem >> AT+CESQ
    2021-02-25T08:56:20.149Z DEBUG modem << +CESQ: 99,99,255,255,255,255

    Then, about a minute later, it finds a network, but gets rejected with EMM reject cause 15:

    2021-02-25T08:57:26.627Z DEBUG modem << %CESQ: 67,3,25,3
    2021-02-25T08:57:26.634Z DEBUG modem << +CEREG: 2,"C38C","002580CF",9,0,0,"11100000","11100000"
    2021-02-25T08:57:27.054Z DEBUG modem << +CNEC_ESM: 111,0
    2021-02-25T08:57:27.059Z DEBUG modem << +CNEC_EMM: 15
    2021-02-25T08:57:27.063Z DEBUG modem << +CEREG: 4,"C38C","002580CF",9,0,15,"11100000","11100000"
    2021-02-25T08:57:27.799Z DEBUG modem << %CESQ: 255,0,255,0
    2021-02-25T08:57:27.804Z DEBUG modem << +CEREG: 4,"FFFE","FFFFFFFF",9,0,15,"11100000","11100000"
    2021-02-25T08:57:30.682Z DEBUG modem << %CESQ: 69,3,24,3
    2021-02-25T08:57:30.687Z DEBUG modem << +CEREG: 4,"C38C","002580CF",9,0,15,"11100000","11100000"

    Here is what the specification says about cause 15:

    Cause #15 – No suitable cells in tracking area This EMM cause is sent to the UE if it requests service, or if the network initiates a detach request, in a tracking area where the UE, by subscription, is not allowed to operate, but when it should find another allowed tracking area or location area in the same PLMN or an equivalent PLMN.

    You then configure PDP context 1, and get connected a couple of minutes after:

    2021-02-25T09:03:07.561Z DEBUG modem >> AT+CGDCONT=1,"IP","iot.1nce.net"
    2021-02-25T09:03:07.578Z DEBUG modem << OK
    2021-02-25T09:05:20.147Z DEBUG modem << %CESQ: 15,0,0,0
    2021-02-25T09:05:20.179Z DEBUG modem << +CEREG: 2,"D2FF","023C5009",9,0,15,"11100000","11100000"
    2021-02-25T09:05:40.745Z DEBUG modem << +CGEV: ME PDN ACT 0,0
    2021-02-25T09:05:40.764Z DEBUG modem << +CNEC_ESM: 50,0
    2021-02-25T09:05:40.773Z DEBUG modem << +CEREG: 5,"D2FF","023C5009",9,,,"11100000","01011111"
    2021-02-25T09:05:40.781Z DEBUG modem << +CIND: "service",1
    2021-02-25T09:05:40.786Z DEBUG modem << +CIND: "roam",1
    2021-02-25T09:05:40.804Z DEBUG modem >> AT+CGDCONT?
    2021-02-25T09:05:40.836Z DEBUG modem << +CGDCONT: 0,"IP","iot.1nce.net","100.119.232.1",0,0
    2021-02-25T09:05:40.844Z DEBUG modem << +CGDCONT: 1,"IP","iot.1nce.net","",0,0

    While the modem usually gets informed about which APN to connect to from the network, that is not always the case. This seems to be one of those cases.

    To get connected faster, try setting the APN with cid 0 before starting the modem.

    E.g.

    AT+CGDCONT=0,"IP","iot.1nce.net"

    AT+CFUN=1

    Best regards,

    Didrik

  • 0 in reply to Didrik Rokhaug

    Thanks Mr. Rokhaug, do you have the link of the specification you said please ? I don't find it.
    Can I ask you if you have any idea why the UART is in red? I can't find any information on how to activate it and what to do with it.

  • +1 in reply to ActiTAG
    ActiTAG said:
    do you have the link of the specification you said please ?

     https://www.etsi.org/deliver/etsi_ts/124300_124399/124301/13.12.00_60/ts_124301v131200p.pdf

     

    ActiTAG said:
    Can I ask you if you have any idea why the UART is in red?

    It indicates that flow control is disabled. The current implementation on the Thingy:91 does not use flow control, so that is expected.

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