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Problems with LTE connection of Thingy:91 after initial 10MB of data expired

After receiving my Thingy:91, all was working as expected until I found that the included 10MB of data on the iBasis SIM had been used up and the device refused to connect or do anything. I purchased some additional data via the link from nRF Connect for Cloud but this still didn't solve the issue as the device was not flashing at all when switched on.

I then installed nRF Connect v3.5.0 & upgraded the Modem FW and reflashed the Asset Tracker application. When I switch on the device now, as long as the SIM card is not in place, it flashes Cyan and I can see it booting etc but as soon as I do this with the SIM inserted, it starts to flash red after a few seconds.

AT+CFUN?+CFUN: 1OKAT+CGSN=1+CGSN: "352656100748360"OKAT+CGMINordic Semiconductor ASAOKAT+CGMMnRF9160-SICAOKAT+CGMRmfw_nrf9160_1.2.1OKAT+CEMODE?+CEMODE: 2OKAT%XCBAND=?%XCBAND: (2,3,4,8,12,13,20,28)OKAT+CMEE?+CMEE: 0OKAT+CMEE=1OKAT+CNEC?+CNEC: 0OKAT+CNEC=24OKAT+CGEREP?+CGEREP: 0,0OKAT+CGDCONT?+CGDCONT: 0,"IP","","",0,0OKAT+CGACT?+CGACT: 0,0OKAT+CGEREP=1OKAT+CIND=1,1,1OKAT+CEREG=2OKAT+CEREG?+CEREG: 2,2,"05D0","07FB9878",7OKAT%CESQ=1OKAT+CESQ+CESQ: 99,99,255,255,20,31OKAT%XSIM=1OKAT%XSIM?%XSIM: 1OKAT+CPIN?+CPIN: READYOKAT+CPINR="SIM PIN"+CPINR: "SIM PIN",3OKAT+CIMI204080813554496OK%CESQ: 29,1,21,3+CGEV: ME PDN ACT 0,0AT+CGDCONT?[00:00:03.386,352] [1;31m<err> lte_lc: Could not parse AT+CEREG response, error: -11[0m[00:00:03.394,317] [1;31m<err> lte_lc: Could not get network registration status[0m+CNEC_ESM: 50,0[00:00:03.403,594] [1;31m<err> lte_lc: Could not parse AT+CEREG response, error: -11[0m[00:00:03.411,560] [1;31m<err> lte_lc: Could not get network registration status[0m+CEREG: 5,"05D0","07FB9878",7[00:00:03.422,119] [0m<dbg> lte_lc.parse_nw_reg_status: Netwistration status: 5[0m[00:00:03.430,389] [0m<inf> asset_tracker: Connected to LTE network[0m+CIND: "service",1+CIND: "roam",1+CGDCONT: 0,"IP","ibasis.iot","10.160.4.151",0,0OKAT+CGACT?+CGACT: 0,1OK[00:00:03.658,996] [0m<dbg> nrf_cloud_transport.nct_connect: IPv4 Address 0x6ee1a136[0m[00:00:03.666,961] [0m<dbg> nrf_cloud_transport.nct_mqtt_connect: mqtt_connect requesting persistent session[0m[00:00:03.833,801] [0m<dbg> nrf_cloud_transport.nct_mqtt_connect: mqtt_connect failed -95[0m[00:00:03.842,193] [1;31m<err> asset_tracker: Failed to connect to cloud, error -8[0m[00:00:03.850,067] [1;31m<err> asset_tracker: Ensure device has a valid CA and client certificate[0m[00:00:03.859,130] [1;31m<err> asset_tracker: Device will reboot in 300 seconds[0m[00:00:03.866,668] [1;31m<err> asset_tracker: LTE link disconnect[0m+CGEV: ME PDN DEACT 0AT+CGDCONT?+CEREG: 0,"05D0","07FB9878",7+CIND: "service",0+CIND: "roam",0+CGEV: ME DETACH%CESQ: 255,0,255,0%XSIM: 0[00:00:05.351,562] [1;31m<err> asset_tracker: Shutdown modem[0m[00:05:03.866,729] [1;31m<err> asset_tracker: LTE link disconnect[0m

This is what I'm seeing in the nRF Connect app when the SIM is in place.

Does anyone have any thoughts on what I need to do to get this back working again?

  • Easier to read version of the logs that I'm getting... :) 

    2020-09-03T16:40:25.751Z INFO Modem port is opened
    2020-09-03T16:40:25.754Z DEBUG modem >> AT+CFUN?
    2020-09-03T16:40:25.759Z DEBUG modem << +CFUN: 1
    2020-09-03T16:40:25.760Z DEBUG modem <<
    2020-09-03T16:40:25.763Z DEBUG modem << OK
    2020-09-03T16:40:25.772Z DEBUG modem >> AT+CGSN=1
    2020-09-03T16:40:25.778Z DEBUG modem << +CGSN: "352656100748360"
    2020-09-03T16:40:25.782Z DEBUG modem <<
    2020-09-03T16:40:25.783Z DEBUG modem << OK
    2020-09-03T16:40:25.791Z DEBUG modem >> AT+CGMI
    2020-09-03T16:40:25.797Z DEBUG modem << Nordic Semiconductor ASA
    2020-09-03T16:40:25.799Z DEBUG modem <<
    2020-09-03T16:40:25.801Z DEBUG modem << OK
    2020-09-03T16:40:25.809Z DEBUG modem >> AT+CGMM
    2020-09-03T16:40:25.814Z DEBUG modem << nRF9160-SICA
    2020-09-03T16:40:25.815Z DEBUG modem <<
    2020-09-03T16:40:25.816Z DEBUG modem << OK
    2020-09-03T16:40:25.824Z DEBUG modem >> AT+CGMR
    2020-09-03T16:40:25.829Z DEBUG modem << mfw_nrf9160_1.2.1
    2020-09-03T16:40:25.831Z DEBUG modem <<
    2020-09-03T16:40:25.832Z DEBUG modem << OK
    2020-09-03T16:40:25.832Z INFO Nordic Semiconductor ASA nRF9160-SICA [mfw_nrf9160_1.2.1] SerNr: 352656100748360
    2020-09-03T16:40:25.834Z DEBUG modem >> AT+CEMODE?
    2020-09-03T16:40:25.841Z DEBUG modem << +CEMODE: 2
    2020-09-03T16:40:25.843Z DEBUG modem <<
    2020-09-03T16:40:25.843Z DEBUG modem << OK
    2020-09-03T16:40:25.847Z DEBUG modem >> AT%XCBAND=?
    2020-09-03T16:40:25.857Z DEBUG modem << %XCBAND: (2,3,4,8,12,13,20,28)
    2020-09-03T16:40:25.859Z DEBUG modem <<
    2020-09-03T16:40:25.860Z DEBUG modem << OK
    2020-09-03T16:40:25.865Z DEBUG modem >> AT+CMEE?
    2020-09-03T16:40:25.878Z DEBUG modem << +CMEE: 0
    2020-09-03T16:40:25.880Z DEBUG modem <<
    2020-09-03T16:40:25.881Z DEBUG modem << OK
    2020-09-03T16:40:25.884Z DEBUG modem >> AT+CMEE=1
    2020-09-03T16:40:25.893Z DEBUG modem << OK
    2020-09-03T16:40:25.895Z DEBUG modem >> AT+CNEC?
    2020-09-03T16:40:25.901Z DEBUG modem << +CNEC: 0
    2020-09-03T16:40:25.908Z DEBUG modem <<
    2020-09-03T16:40:25.909Z DEBUG modem << OK
    2020-09-03T16:40:25.913Z DEBUG modem >> AT+CNEC=24
    2020-09-03T16:40:25.917Z DEBUG modem << OK
    2020-09-03T16:40:25.926Z DEBUG modem >> AT+CGEREP?
    2020-09-03T16:40:25.931Z DEBUG modem << +CGEREP: 0,0
    2020-09-03T16:40:25.933Z DEBUG modem <<
    2020-09-03T16:40:25.933Z DEBUG modem << OK
    2020-09-03T16:40:25.940Z DEBUG modem >> AT+CGDCONT?
    2020-09-03T16:40:25.947Z DEBUG modem << +CGDCONT: 0,"IP","","",0,0
    2020-09-03T16:40:25.948Z DEBUG modem <<
    2020-09-03T16:40:25.949Z DEBUG modem << OK
    2020-09-03T16:40:25.962Z DEBUG modem >> AT+CGACT?
    2020-09-03T16:40:25.967Z DEBUG modem << +CGACT: 0,0
    2020-09-03T16:40:25.969Z DEBUG modem <<
    2020-09-03T16:40:25.969Z DEBUG modem << OK
    2020-09-03T16:40:25.980Z DEBUG modem >> AT+CGEREP=1
    2020-09-03T16:40:25.985Z DEBUG modem << OK
    2020-09-03T16:40:25.992Z DEBUG modem >> AT+CIND=1,1,1
    2020-09-03T16:40:25.996Z DEBUG modem << OK
    2020-09-03T16:40:26.000Z DEBUG modem >> AT+CEREG=2
    2020-09-03T16:40:26.009Z DEBUG modem << OK
    2020-09-03T16:40:26.013Z DEBUG modem >> AT+CEREG?
    2020-09-03T16:40:26.023Z DEBUG modem << +CEREG: 2,2,"05D0","07FB9878",7
    2020-09-03T16:40:26.025Z DEBUG modem <<
    2020-09-03T16:40:26.026Z DEBUG modem << OK
    2020-09-03T16:40:26.032Z DEBUG modem >> AT%CESQ=1
    2020-09-03T16:40:26.041Z DEBUG modem << OK
    2020-09-03T16:40:26.044Z DEBUG modem >> AT+CESQ
    2020-09-03T16:40:26.050Z DEBUG modem << +CESQ: 99,99,255,255,20,31
    2020-09-03T16:40:26.058Z DEBUG modem <<
    2020-09-03T16:40:26.059Z DEBUG modem << OK
    2020-09-03T16:40:26.063Z DEBUG modem >> AT%XSIM=1
    2020-09-03T16:40:26.074Z DEBUG modem << OK
    2020-09-03T16:40:26.077Z DEBUG modem >> AT%XSIM?
    2020-09-03T16:40:26.081Z DEBUG modem << %XSIM: 1
    2020-09-03T16:40:26.083Z DEBUG modem <<
    2020-09-03T16:40:26.084Z DEBUG modem << OK
    2020-09-03T16:40:26.097Z DEBUG modem >> AT+CPIN?
    2020-09-03T16:40:26.102Z DEBUG modem << +CPIN: READY
    2020-09-03T16:40:26.112Z DEBUG modem <<
    2020-09-03T16:40:26.113Z DEBUG modem << OK
    2020-09-03T16:40:26.123Z DEBUG modem >> AT+CPINR="SIM PIN"
    2020-09-03T16:40:26.141Z DEBUG modem << +CPINR: "SIM PIN",3
    2020-09-03T16:40:26.143Z DEBUG modem <<
    2020-09-03T16:40:26.147Z DEBUG modem << OK
    2020-09-03T16:40:26.160Z DEBUG modem >> AT+CIMI
    2020-09-03T16:40:26.165Z DEBUG modem << 204080813554496
    2020-09-03T16:40:26.167Z DEBUG modem <<
    2020-09-03T16:40:26.168Z DEBUG modem << OK
    2020-09-03T16:40:26.169Z INFO IMSIdentity: 204080813554496
    2020-09-03T16:40:27.116Z DEBUG modem << %CESQ: 29,1,21,3
    2020-09-03T16:40:27.306Z DEBUG modem << +CGEV: ME PDN ACT 0,0
    2020-09-03T16:40:27.340Z DEBUG modem >> AT+CGDCONT?
    2020-09-03T16:40:27.342Z DEBUG modem << [00:00:03.386,352] [1;31m<err> lte_lc: Could not parse AT+CEREG response, error: -11[0m
    2020-09-03T16:40:27.343Z DEBUG modem << [00:00:03.394,317] [1;31m<err> lte_lc: Could not get network registration status[0m
    2020-09-03T16:40:27.347Z DEBUG modem << +CNEC_ESM: 50,0
    2020-09-03T16:40:27.349Z DEBUG modem << [00:00:03.403,594] [1;31m<err> lte_lc: Could not parse AT+CEREG response, error: -11[0m
    2020-09-03T16:40:27.351Z DEBUG modem << [00:00:03.411,560] [1;31m<err> lte_lc: Could not get network registration status[0m
    2020-09-03T16:40:27.352Z DEBUG modem << +CEREG: 5,"05D0","07FB9878",7
    2020-09-03T16:40:27.354Z DEBUG modem << [00:00:03.422,119] [0m<dbg> lte_lc.parse_nw_reg_status: Netwistration status: 5[0m
    2020-09-03T16:40:27.372Z DEBUG modem << [00:00:03.430,389] [0m<inf> asset_tracker: Connected to LTE network[0m
    2020-09-03T16:40:27.372Z DEBUG modem << +CIND: "service",1
    2020-09-03T16:40:27.373Z DEBUG modem << +CIND: "roam",1
    2020-09-03T16:40:27.374Z DEBUG modem << +CGDCONT: 0,"IP","ibasis.iot","10.160.4.151",0,0
    2020-09-03T16:40:27.375Z DEBUG modem << OK
    2020-09-03T16:40:27.383Z DEBUG modem >> AT+CGACT?
    2020-09-03T16:40:27.392Z DEBUG modem << +CGACT: 0,1
    2020-09-03T16:40:27.393Z DEBUG modem <<
    2020-09-03T16:40:27.394Z DEBUG modem << OK
    2020-09-03T16:40:27.584Z DEBUG modem << [00:00:03.658,996] [0m<dbg> nrf_cloud_transport.nct_connect: IPv4 Address 0x6ee1a136[0m
    2020-09-03T16:40:27.605Z DEBUG modem << [00:00:03.666,961] [0m<dbg> nrf_cloud_transport.nct_mqtt_connect: mqtt_connect requesting persistent session[0m
    2020-09-03T16:40:27.759Z DEBUG modem << [00:00:03.833,801] [0m<dbg> nrf_cloud_transport.nct_mqtt_connect: mqtt_connect failed -95[0m
    2020-09-03T16:40:27.767Z DEBUG modem << [00:00:03.842,193] [1;31m<err> asset_tracker: Failed to connect to cloud, error -8[0m
    2020-09-03T16:40:27.798Z DEBUG modem << [00:00:03.850,067] [1;31m<err> asset_tracker: Ensure device has a valid CA and client certificate[0m
    2020-09-03T16:40:27.801Z DEBUG modem << [00:00:03.859,130] [1;31m<err> asset_tracker: Device will reboot in 300 seconds[0m
    2020-09-03T16:40:27.804Z DEBUG modem << [00:00:03.866,668] [1;31m<err> asset_tracker: LTE link disconnect[0m
    2020-09-03T16:40:27.862Z DEBUG modem << +CGEV: ME PDN DEACT 0
    2020-09-03T16:40:27.874Z DEBUG modem >> AT+CGDCONT?
    2020-09-03T16:40:27.875Z DEBUG modem << +CEREG: 0,"05D0","07FB9878",7
    2020-09-03T16:40:27.875Z DEBUG modem << +CIND: "service",0
    2020-09-03T16:40:27.876Z DEBUG modem << +CIND: "roam",0
    2020-09-03T16:40:27.877Z DEBUG modem << +CGEV: ME DETACH
    2020-09-03T16:40:29.167Z DEBUG modem << %CESQ: 255,0,255,0
    2020-09-03T16:40:29.172Z DEBUG modem <<
    2020-09-03T16:40:29.197Z DEBUG modem << %XSIM: 0
    2020-09-03T16:40:29.198Z DEBUG modem <<
    2020-09-03T16:40:29.273Z DEBUG modem << [00:00:05.351,562] [1;31m<err> asset_tracker: Shutdown modem[0m
    2020-09-03T16:40:29.275Z DEBUG modem <<
    2020-09-03T16:45:27.791Z DEBUG modem << [00:05:03.866,729] [1;31m<err> asset_tracker: LTE link disconnect[0m
  • Problem solved by downloading new Device Certificate and using LTE Link Monitor to reprovision device. Now working again

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