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nRF9160 NB-IoT SIM registration step by step guide

hi 

I have nRF9160 dev kit, which I am using in a LAB with a private LTE SIM card, which has 99920 PLMN ID.

The network supports Band 3, and NB-IoT is configured as an in-band signalling.

I am using nRF connect 3.6.1 software to fire up the AT commands, which includes scanning of the network, and then it should allow me to register to the network

which is not happening, 

at this stage, can you please provide me step by step AT command guide to troubleshoot the problem, 

I am attaching the initial device logs collected, 

Moreover, I have also tried with the Vodafone commercial SIM card, which is also not connecting.

I am using this kit with a windows 10 machine, 

looking foward

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  • Greetings!

    The applications you are running on your nRF9160 DK are configured to connect to an LTE-M network, which is not supported by the device:

    2021-06-01T15:26:53.306Z DEBUG modem << +CEREG: 2,"FFFE","FFFFFFFF",7,0,0,"11100000","11100000"

    See the +CEREG command.

    <AcT> 7 – E-UTRAN = LTE-M
    
    
    You have to change your prj.conf as following:

    CONFIG_LTE_NETWORK_MODE_LTE_M=n
    CONFIG_LTE_NETWORK_MODE_NBIOT=y

    or

    CONFIG_LTE_NETWORK_MODE_LTE_M_NBIOT_GPS=y

    if you want to add GPS support.

    I hope this will help you!

    Regards,

    Markus

  • hi Marcus

    Yesterday after few hours, the device has recognized VF SIM and registered with NB-IoT

    now, this morning i have switched to the testbed SIM card, starting with 99920

    This is still not accepting, 

    I am trying to set up Band 3, with AT command (below are the example AT commands from Quectel, I could not find the replacement AT commands for nRF9160)

    Select Band 3
    AT+QCFG=“band”,0,0,4,1
    OK

    LTE Cat NB1
    AT+QCFG=“nwscanseq”,03,1
    OK

    LTE only
    AT+QCFG=“nwscanmode”,3
    OK

    LTE Cat NB1
    at+qcfg=“iotopmode”,1
    OK

    Define PDP Context
    AT+CGDCONT=1,“IP”,“nbiot”
    OK

    the device is not accepting any AT command, 

    i have done few restarts, 

    though it is showing a flashing amber on the screen, 

    How can I verify that the device is scanning for NB-IoT, 

    if it does then it should be showing me a print like this

    at+cops=?
    +COPS: (1,"999 20","999 20","99920",9),,(0,1,2,3,4),(0,1,2)0871.2021-06-01T15_24_10.526Z-log-VF-working-private-not.zip

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  • hi Marcus

    Yesterday after few hours, the device has recognized VF SIM and registered with NB-IoT

    now, this morning i have switched to the testbed SIM card, starting with 99920

    This is still not accepting, 

    I am trying to set up Band 3, with AT command (below are the example AT commands from Quectel, I could not find the replacement AT commands for nRF9160)

    Select Band 3
    AT+QCFG=“band”,0,0,4,1
    OK

    LTE Cat NB1
    AT+QCFG=“nwscanseq”,03,1
    OK

    LTE only
    AT+QCFG=“nwscanmode”,3
    OK

    LTE Cat NB1
    at+qcfg=“iotopmode”,1
    OK

    Define PDP Context
    AT+CGDCONT=1,“IP”,“nbiot”
    OK

    the device is not accepting any AT command, 

    i have done few restarts, 

    though it is showing a flashing amber on the screen, 

    How can I verify that the device is scanning for NB-IoT, 

    if it does then it should be showing me a print like this

    at+cops=?
    +COPS: (1,"999 20","999 20","99920",9),,(0,1,2,3,4),(0,1,2)0871.2021-06-01T15_24_10.526Z-log-VF-working-private-not.zip

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