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    SIMCOM 7000E registration failes

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    • D
      DutchDev last edited by

      Hi,

      We have the SIMCOM 7000E evaluation board but somehow cannot always connect to the NB-IOT network. We also have several uBlox modules on the same location and these are always connecting, so the signal should not be the problem i guess.

      The tested output is below:
      ATZ
      OK
      AT+CFUN=0
      +CPIN: NOT READY
      OK
      AT+CNMP=38
      OK
      AT+CMNB=2
      OK
      AT+NBSC=0
      OK
      AT+CBANDCFG=“NB-IOT”,8
      OK
      AT+CFUN=1
      OK
      +CPIN: READY
      SMS Ready
      AT+CREG=1
      OK
      AT+COPS=1,2,“20416”,9
      OK
      +CREG: 3
      +CREG: 2
      AT+COPS?
      +COPS: 0,2,“20416”,0 //Connected to the GSM network
      OK
      AT+CREG?
      +CREG: 1,2
      OK
      AT+CGREG?
      +CGREG: 0,5
      OK
      AT+CGATT?
      +CGATT: 1
      OK
      AT+CPSI?
      +CPSI: GSM,Online,204-16,0x0405,13253,858 DCS 1800,-82,0,29-29
      OK

      As shown in the last line we somehow always connect to the GSM network. Last Monday we were able to the NB-IOT network connect twice, but it is is not clear why, the log of Monday below:
      ATZ
      OK
      AT+CFUN=0
      +CPIN: NOT READY
      OK
      AT+CNMP=38
      OK
      AT+CMNB=2
      OK
      AT+NBSC=0
      OK
      AT+CBANDCFG=“NB-IOT”,8
      OK
      AT+CFUN=1
      OK
      +CPIN: READY
      SMS Ready
      AT+CREG=1
      OK
      AT+COPS=1,2,“20416”
      OK
      +CREG: 0
      +CREG: 3
      AT+COPS=1,2,“20416”,9
      OK
      AT+CGREG?
      +CGREG: 0,5
      OK
      AT+COPS?
      +COPS: 1,2,“20416”,9 //Connected to the NB-IOT network
      OK
      AT+CGATT?
      +CGATT: 1
      AT+CGPADDR
      +CGPADDR: 1,10.128.0.134 //We got an IP address

      Has anybody seen the same behavior before or has a clue on how to check/fix what could be wrong?

      D 1 Reply Last reply Reply Quote 0
      • D
        DutchDev @DutchDev last edited by

        Ok, found it, module issue. We got a new module and that is working fine.

        S 1 Reply Last reply Reply Quote 2
        • S
          Shuang Zhang @DutchDev last edited by

          @dutchdev may I ask which module is working ?

          1 Reply Last reply Reply Quote 0
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