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custom nrf9160 board unable to connect : SIP version pb ?

fgaultier

Hi,

We developped a custom NRF9160 board and it works fine, it connects to LTE-M. We then designed a new version of the same board by adding few things (like NRF52833 MCU) and it does not connect anymore.

  • On the new boards, the schematics related to NRF9160 are essentially the same as on the older version
  • On the new boards, the firmware running the NRF9160 modem part looked rather old (somthing like mfw_nrf9160_0.6.x-xx.alpha or mfw_nrf9160_0.5.x-xx.alpha) 
  • The AT%XSIM? command always returned 0 and we add to update the firmware to newer version nrf9160_1.2.3 before the SIM card activation successfully returned 1
  • But still, the NRF9160 refuse to connect.
  • Directement measurements on the antenna PIN show nothings go out
  • The SIM card  is the same
  • The results of AT commands are similar to those from earlier board (see below)

The SIP on the former board was: nRF9160 SICA B0 2025BC

The SIP on newer board is: nRF9160 SICA B0 191102

 

AT+CFUN?
+CFUN: 4
OK
AT+CFUN=1
OK
AT+CFUN?
+CFUN: 1
OK
AT+CGSN=1
+CGSN: "352656100163024"
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
901405101055803
OK

Parents
  • 0

    Hi,

    measurements on the antenna PIN show nothings go out

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

    schematics related to NRF9160 are essentially the same as on the older version

    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

  • 0 in reply to JONATHAN LL

    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

  • 0 in reply to fgaultier

    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

  • 0 in reply to fgaultier

    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

Reply
  • 0 in reply to fgaultier

    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

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