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MQTT Client disconnect in MQTT_Sample Example

Nahan_Trogn

Hi Devzone,

I use the original MQTT_Sample example, just change "Client ID", "Alive Time" = 120s, use NBIoT + GPS.

Development set up:

ncs v1.5.1, ubuntu, thingy91

1. After a short time, the device receives CEREG notification, such as:

Is this normal or there is something wrong with my network?

2. After that, the Client keeps disconnect and connect continuously.

 Sorry for uploading lots of images, because my log file didn't contain enough log infor.

Maybe the NBIoT signal is weak, is there any solution for the device to work in a weak NBIoT area? I don't want the MQTT client to be disconnected so often.

Fullscreen 2021-06-02T02_24_59.400Z-log.txt Download 
2021-06-02T02:24:59.805Z INFO Application data folder: /home/ubuntu/.config/nrfconnect/pc-nrfconnect-linkmonitor
2021-06-02T02:24:59.870Z DEBUG App pc-nrfconnect-linkmonitor v1.1.10 official
2021-06-02T02:24:59.870Z DEBUG App path: /home/ubuntu/.nrfconnect-apps/node_modules/pc-nrfconnect-linkmonitor
2021-06-02T02:24:59.870Z DEBUG nRFConnect 3.6.1 is supported by the app (^3.6.0)
2021-06-02T02:24:59.870Z DEBUG nRFConnect path: /tmp/.mount_nrfcon69sATx/resources/app.asar
2021-06-02T02:24:59.871Z DEBUG HomeDir: /home/ubuntu
2021-06-02T02:24:59.871Z DEBUG TmpDir: /tmp
2021-06-02T02:38:44.656Z INFO Modem port is opened
2021-06-02T02:38:44.660Z DEBUG modem >> AT+CFUN?
2021-06-02T02:38:44.676Z DEBUG modem << +CFUN: 1
2021-06-02T02:38:44.677Z DEBUG modem << OK
2021-06-02T02:38:44.690Z DEBUG modem >> AT+CGSN=1
2021-06-02T02:38:44.698Z DEBUG modem << +CGSN: "352656101397258"
2021-06-02T02:38:44.700Z DEBUG modem << OK
2021-06-02T02:38:44.709Z DEBUG modem >> AT+CGMI
2021-06-02T02:38:44.724Z DEBUG modem << Nordic Semiconductor ASA
2021-06-02T02:38:44.726Z DEBUG modem << OK
2021-06-02T02:38:44.728Z DEBUG modem >> AT+CGMM
2021-06-02T02:38:44.742Z DEBUG modem << nRF9160-SICA
2021-06-02T02:38:44.743Z DEBUG modem << OK
2021-06-02T02:38:44.746Z DEBUG modem >> AT+CGMR
2021-06-02T02:38:44.759Z DEBUG modem << mfw_nrf9160_1.2.3
2021-06-02T02:38:44.761Z DEBUG modem << OK
2021-06-02T02:38:44.762Z INFO Nordic Semiconductor ASA nRF9160-SICA [mfw_nrf9160_1.2.3] SerNr: 352656101397258
2021-06-02T02:38:44.763Z DEBUG modem >> AT+CEMODE?
2021-06-02T02:38:44.775Z DEBUG modem << +CEMODE: 0
2021-06-02T02:38:44.777Z DEBUG modem << OK
2021-06-02T02:38:44.797Z DEBUG modem >> AT%XCBAND=?
2021-06-02T02:38:44.808Z DEBUG modem << %XCBAND: (1,2,3,4,5,8,12,13,17,19,20,25,26,28,66)
2021-06-02T02:38:44.810Z DEBUG modem << OK
2021-06-02T02:38:44.815Z DEBUG modem >> AT+CMEE?
2021-06-02T02:38:44.827Z DEBUG modem << +CMEE: 0
2021-06-02T02:38:44.829Z DEBUG modem << OK
2021-06-02T02:38:44.831Z DEBUG modem >> AT+CMEE=1
2021-06-02T02:38:44.844Z DEBUG modem << OK
2021-06-02T02:38:44.847Z DEBUG modem >> AT+CNEC?
2021-06-02T02:38:44.857Z DEBUG modem << +CNEC: 0
2021-06-02T02:38:44.858Z DEBUG modem << OK
2021-06-02T02:38:44.860Z DEBUG modem >> AT+CNEC=24
2021-06-02T02:38:44.876Z DEBUG modem << OK
2021-06-02T02:38:44.878Z DEBUG modem >> AT+CGEREP?
2021-06-02T02:38:44.892Z DEBUG modem << +CGEREP: 0,0
2021-06-02T02:38:44.893Z DEBUG modem << OK
2021-06-02T02:38:44.896Z DEBUG modem >> AT+CGDCONT?
2021-06-02T02:38:44.908Z DEBUG modem << OK
2021-06-02T02:38:44.911Z DEBUG modem >> AT+CGACT?
2021-06-02T02:38:44.936Z DEBUG modem << OK
2021-06-02T02:38:44.939Z DEBUG modem >> AT+CGEREP=1
2021-06-02T02:38:44.946Z DEBUG modem << OK
2021-06-02T02:38:44.969Z DEBUG modem >> AT+CIND=1,1,1
2021-06-02T02:38:44.976Z DEBUG modem << OK
2021-06-02T02:38:44.979Z DEBUG modem >> AT+CEREG=5
2021-06-02T02:38:44.993Z DEBUG modem << OK
2021-06-02T02:38:44.996Z DEBUG modem >> AT+CEREG?
2021-06-02T02:38:45.008Z DEBUG modem << +CEREG: 5,4,"FFFE","FFFFFFFF",9,0,0,"00000000","00000000"
2021-06-02T02:38:45.010Z DEBUG modem << OK
2021-06-02T02:38:45.015Z DEBUG modem >> AT%CESQ=1
2021-06-02T02:38:45.027Z DEBUG modem << OK
2021-06-02T02:38:45.030Z DEBUG modem >> AT+CESQ
2021-06-02T02:38:45.042Z DEBUG modem << +CESQ: 99,99,255,255,255,255
2021-06-02T02:38:45.044Z DEBUG modem << OK
2021-06-02T02:38:45.048Z DEBUG modem >> AT%XSIM=1
2021-06-02T02:38:45.062Z DEBUG modem << OK
2021-06-02T02:38:45.065Z DEBUG modem >> AT%XSIM?
2021-06-02T02:38:45.075Z DEBUG modem << %XSIM: 1
2021-06-02T02:38:45.077Z DEBUG modem << OK
2021-06-02T02:38:45.081Z DEBUG modem >> AT+CPIN?
2021-06-02T02:38:45.095Z DEBUG modem << +CPIN: READY
2021-06-02T02:38:45.096Z DEBUG modem << OK
2021-06-02T02:38:45.109Z DEBUG modem >> AT+CPINR="SIM PIN"
2021-06-02T02:38:45.127Z DEBUG modem << +CPINR: "SIM PIN",3
2021-06-02T02:38:45.128Z DEBUG modem << OK
2021-06-02T02:38:45.143Z DEBUG modem >> AT+CIMI
2021-06-02T02:38:45.158Z DEBUG modem << 452040325353031
2021-06-02T02:38:45.159Z DEBUG modem << OK
2021-06-02T02:38:45.160Z INFO IMSIdentity: 452040325353031
2021-06-02T02:42:43.531Z INFO Modem port is opened
2021-06-02T02:42:43.533Z DEBUG modem >> AT+CFUN?
2021-06-02T02:42:43.558Z DEBUG modem << +CFUN: 0
2021-06-02T02:42:43.560Z DEBUG modem << OK
2021-06-02T02:42:47.964Z DEBUG modem << [00:00:05.232,574] [0m<inf> mqtt_simple: The MQTT simple sample started[0m
2021-06-02T02:42:47.967Z DEBUG modem << [00:00:05.232,574] [0m<inf> mqtt_simple: Disabling PSM and eDRX[0m
2021-06-02T02:42:47.969Z DEBUG modem << [00:00:05.248,474] [0m<inf> mqtt_simple: LTE Link Connecting...[0m
2021-06-02T02:42:48.946Z DEBUG modem << +CEREG: 2,"61E6","090A8C16",9,0,0,"11100000","11100000"
2021-06-02T02:42:49.343Z DEBUG modem << +CSCON: 1
2021-06-02T02:42:50.746Z DEBUG modem << +CEREG: 1,"61E6","090A8C16",9,,,"11100000","11100000"
2021-06-02T02:42:50.767Z DEBUG modem >> AT+COPS=3,2
2021-06-02T02:42:50.773Z DEBUG modem << OK
2021-06-02T02:42:50.776Z DEBUG modem >> AT+COPS?
2021-06-02T02:42:50.783Z DEBUG modem << +COPS: 0,2,"45204",9
2021-06-02T02:42:50.785Z DEBUG modem << OK
2021-06-02T02:42:50.801Z DEBUG modem >> AT%XCBAND
2021-06-02T02:42:50.807Z DEBUG modem << %XCBAND: 3
2021-06-02T02:42:50.809Z DEBUG modem << OK
2021-06-02T02:42:50.817Z DEBUG modem >> AT+CGDCONT?
2021-06-02T02:42:50.829Z DEBUG modem << +CGDCONT: 0,"IP","nbiot","9.75.31.91",0,0
2021-06-02T02:42:50.831Z DEBUG modem << OK
2021-06-02T02:42:50.844Z DEBUG modem >> AT+CGACT?
2021-06-02T02:42:50.862Z DEBUG modem << +CGACT: 0,1
2021-06-02T02:42:50.864Z DEBUG modem << OK
2021-06-02T02:42:51.758Z DEBUG modem << [00:00:09.040,222] [0m<inf> mqtt_simple: LTE Link Connected![0m
2021-06-02T02:42:51.762Z DEBUG modem << [00:00:09.960,784] [0m<inf> mqtt_simple: IPv4 Address found 137.135.83.217[0m
2021-06-02T02:42:53.776Z DEBUG modem << [00:00:11.051,849] [0m<inf> mqtt_simple: MQTT client connected[0m
2021-06-02T02:42:53.779Z DEBUG modem << [00:00:11.051,849] [0m<inf> mqtt_simple: Subscribing to: my/subscribe/topic len 18[0m
2021-06-02T02:42:53.780Z DEBUG modem << [00:00:11.566,894] [0m<inf> mqtt_simple: SUBACK packet id: 1234[0m
2021-06-02T02:42:55.133Z DEBUG modem << [00:00:12.397,888] [0m<inf> mqtt_simple: MQTT PUBLISH result=0 len=5[0m
2021-06-02T02:42:55.137Z DEBUG modem << [00:00:12.397,979] [0m<inf> mqtt_simple: Received: 45664[0m
2021-06-02T02:42:55.141Z DEBUG modem << [00:00:12.443,420] [0m<inf> mqtt_simple: Publishing: 45664[0m
2021-06-02T02:42:55.144Z DEBUG modem << [00:00:12.443,420] [0m<inf> mqtt_simple: to topic: my/publish/topic len: 16[0m
2021-06-02T02:42:55.147Z DEBUG modem << [00:00:12.885,894] [0m<inf> mqtt_simple: PUBACK packet id: 26503[0m
2021-06-02T02:43:24.972Z DEBUG modem << +CSCON: 0
2021-06-02T02:44:54.462Z DEBUG modem << +CSCON: 1
2021-06-02T02:45:25.949Z DEBUG modem << +CSCON: 0
2021-06-02T02:46:54.453Z DEBUG modem << +CSCON: 1
2021-06-02T02:47:25.958Z DEBUG modem << +CSCON: 0
2021-06-02T02:48:54.451Z DEBUG modem << +CSCON: 1
2021-06-02T02:49:25.956Z DEBUG modem << +CSCON: 0
2021-06-02T02:50:54.770Z DEBUG modem << +CSCON: 1
2021-06-02T02:50:56.963Z DEBUG modem >> AT
2021-06-02T02:50:56.996Z DEBUG modem << OK
2021-06-02T02:51:26.906Z DEBUG modem << +CSCON: 0
2021-06-02T02:52:54.450Z DEBUG modem << +CSCON: 1
2021-06-02T02:53:25.946Z DEBUG modem << +CSCON: 0
2021-06-02T02:54:54.769Z DEBUG modem << +CSCON: 1
2021-06-02T02:55:26.915Z DEBUG modem << +CSCON: 0
2021-06-02T02:56:54.769Z DEBUG modem << +CSCON: 1
2021-06-02T02:57:26.905Z DEBUG modem << +CSCON: 0
2021-06-02T02:58:54.768Z DEBUG modem << +CSCON: 1
2021-06-02T02:59:26.916Z DEBUG modem << +CSCON: 0
2021-06-02T03:00:54.778Z DEBUG modem << +CSCON: 1
2021-06-02T03:01:26.930Z DEBUG modem << +CSCON: 0
2021-06-02T03:02:54.449Z DEBUG modem << +CSCON: 1
2021-06-02T03:03:25.955Z DEBUG modem << +CSCON: 0
2021-06-02T03:04:54.354Z DEBUG modem << +CEREG: 1,"FFFE","FFFFFFFF",9,,,"11100000","11100000"
2021-06-02T03:04:54.390Z DEBUG modem >> AT+COPS=3,2
2021-06-02T03:04:54.396Z DEBUG modem << OK
2021-06-02T03:04:54.398Z DEBUG modem >> AT+COPS?
2021-06-02T03:04:54.405Z DEBUG modem << +COPS: 0
2021-06-02T03:04:54.406Z DEBUG modem << OK
2021-06-02T03:04:54.424Z DEBUG modem >> AT%XCBAND
2021-06-02T03:04:54.431Z DEBUG modem << %XCBAND: 0
2021-06-02T03:04:54.433Z DEBUG modem << OK
2021-06-02T03:04:54.442Z DEBUG modem >> AT+CGDCONT?
2021-06-02T03:04:54.460Z DEBUG modem << +CGDCONT: 0,"IP","nbiot","9.75.31.91",0,0
2021-06-02T03:04:54.462Z DEBUG modem << OK
2021-06-02T03:04:54.471Z DEBUG modem >> AT+CGACT?
2021-06-02T03:04:54.489Z DEBUG modem << +CGACT: 0,1
2021-06-02T03:04:54.490Z DEBUG modem << OK
2021-06-02T03:04:54.834Z DEBUG modem << +CEREG: 1,"61E6","090A8C16",9,,,"11100000","11100000"
2021-06-02T03:04:54.866Z DEBUG modem >> AT+COPS=3,2
2021-06-02T03:04:54.872Z DEBUG modem << OK
2021-06-02T03:04:54.874Z DEBUG modem >> AT+COPS?
2021-06-02T03:04:54.890Z DEBUG modem << +COPS: 0,2,"45204",9
2021-06-02T03:04:54.892Z DEBUG modem << OK
2021-06-02T03:04:54.911Z DEBUG modem >> AT%XCBAND
2021-06-02T03:04:54.917Z DEBUG modem << %XCBAND: 3
2021-06-02T03:04:54.919Z DEBUG modem << OK
2021-06-02T03:04:54.936Z DEBUG modem >> AT+CGDCONT?
2021-06-02T03:04:54.956Z DEBUG modem << +CGDCONT: 0,"IP","nbiot","9.75.31.91",0,0
2021-06-02T03:04:54.958Z DEBUG modem << OK
2021-06-02T03:04:54.974Z DEBUG modem >> AT+CGACT?
2021-06-02T03:04:54.988Z DEBUG modem << +CGACT: 0,1
2021-06-02T03:04:54.989Z DEBUG modem << OK
2021-06-02T03:04:55.014Z DEBUG modem << +CEREG: 1,"FFFE","FFFFFFFF",9,,,"11100000","11100000"
2021-06-02T03:04:55.019Z DEBUG modem >> AT+COPS=3,2
2021-06-02T03:04:55.027Z DEBUG modem << OK
2021-06-02T03:04:55.059Z DEBUG modem >> AT+COPS?
2021-06-02T03:04:55.074Z DEBUG modem << +COPS: 0
2021-06-02T03:04:55.075Z DEBUG modem << OK
2021-06-02T03:04:55.092Z DEBUG modem >> AT%XCBAND
2021-06-02T03:04:55.108Z DEBUG modem << %XCBAND: 0
2021-06-02T03:04:55.109Z DEBUG modem << OK
2021-06-02T03:04:55.125Z DEBUG modem >> AT+CGDCONT?
2021-06-02T03:04:55.141Z DEBUG modem << +CGDCONT: 0,"IP","nbiot","9.75.31.91",0,0
2021-06-02T03:04:55.143Z DEBUG modem << OK
2021-06-02T03:04:55.159Z DEBUG modem >> AT+CGACT?
2021-06-02T03:04:55.175Z DEBUG modem << +CGACT: 0,1
2021-06-02T03:04:55.178Z DEBUG modem << OK
2021-06-02T03:04:55.475Z DEBUG modem << +CEREG: 1,"61E6","090A8C16",9,,,"11100000","11100000"
2021-06-02T03:04:55.510Z DEBUG modem >> AT+COPS=3,2
2021-06-02T03:04:55.525Z DEBUG modem << OK
2021-06-02T03:04:55.541Z DEBUG modem >> AT+COPS?
2021-06-02T03:04:55.558Z DEBUG modem << +COPS: 0,2,"45204",9
2021-06-02T03:04:55.560Z DEBUG modem << OK
2021-06-02T03:04:55.577Z DEBUG modem >> AT%XCBAND
2021-06-02T03:04:55.598Z DEBUG modem << %XCBAND: 3
2021-06-02T03:04:55.599Z DEBUG modem << OK
2021-06-02T03:04:55.604Z DEBUG modem >> AT+CGDCONT?
2021-06-02T03:04:55.648Z DEBUG modem << +CGDCONT: 0,"IP","nbiot","9.75.31.91",0,0
2021-06-02T03:04:55.650Z DEBUG modem << OK
2021-06-02T03:04:55.656Z DEBUG modem >> AT+CGACT?
2021-06-02T03:04:55.674Z DEBUG modem << +CGACT: 0,1
2021-06-02T03:04:55.675Z DEBUG modem << OK
2021-06-02T03:04:56.050Z DEBUG modem << +CSCON: 1
2021-06-02T03:05:28.450Z DEBUG modem << +CSCON: 0
2021-06-02T03:06:55.089Z DEBUG modem << +CSCON: 1
2021-06-02T03:07:26.905Z DEBUG modem << +CSCON: 0
2021-06-02T03:08:54.202Z DEBUG modem << +CEREG: 1,"FFFE","FFFFFFFF",9,,,"11100000","11100000"
2021-06-02T03:08:54.238Z DEBUG modem >> AT+COPS=3,2
2021-06-02T03:08:54.245Z DEBUG modem << OK
2021-06-02T03:08:54.259Z DEBUG modem >> AT+COPS?
2021-06-02T03:08:54.266Z DEBUG modem << +COPS: 0
2021-06-02T03:08:54.267Z DEBUG modem << OK
2021-06-02T03:08:54.275Z DEBUG modem >> AT%XCBAND
2021-06-02T03:08:54.293Z DEBUG modem << %XCBAND: 0
2021-06-02T03:08:54.295Z DEBUG modem << OK
2021-06-02T03:08:54.299Z DEBUG modem >> AT+CGDCONT?
2021-06-02T03:08:54.326Z DEBUG modem << +CGDCONT: 0,"IP","nbiot","9.75.31.91",0,0
2021-06-02T03:08:54.327Z DEBUG modem << OK
2021-06-02T03:08:54.342Z DEBUG modem >> AT+CGACT?
2021-06-02T03:08:54.360Z DEBUG modem << +CGACT: 0,1
2021-06-02T03:08:54.361Z DEBUG modem << OK
2021-06-02T03:08:54.835Z DEBUG modem << +CEREG: 1,"61E6","090A8C16",9,,,"11100000","11100000"
2021-06-02T03:08:54.873Z DEBUG modem >> AT+COPS=3,2
2021-06-02T03:08:54.893Z DEBUG modem << OK
2021-06-02T03:08:54.906Z DEBUG modem >> AT+COPS?
2021-06-02T03:08:54.926Z DEBUG modem << +COPS: 0,2,"45204",9
2021-06-02T03:08:54.928Z DEBUG modem << OK
2021-06-02T03:08:54.943Z DEBUG modem >> AT%XCBAND
2021-06-02T03:08:54.960Z DEBUG modem << %XCBAND: 3
2021-06-02T03:08:54.962Z DEBUG modem << OK
2021-06-02T03:08:54.979Z DEBUG modem >> AT+CGDCONT?
2021-06-02T03:08:54.995Z DEBUG modem << +CGDCONT: 0,"IP","nbiot","9.75.31.91",0,0
2021-06-02T03:08:54.998Z DEBUG modem << OK
2021-06-02T03:08:55.020Z DEBUG modem >> AT+CGACT?
2021-06-02T03:08:55.038Z DEBUG modem << +CGACT: 0,1
2021-06-02T03:08:55.041Z DEBUG modem << OK
2021-06-02T03:08:56.058Z DEBUG modem << +CSCON: 1
2021-06-02T03:09:27.572Z DEBUG modem << +CSCON: 0
2021-06-02T03:10:54.206Z DEBUG modem << +CEREG: 1,"FFFE","FFFFFFFF",9,,,"11100000","11100000"
2021-06-02T03:10:54.212Z DEBUG modem >> AT+COPS=3,2
2021-06-02T03:10:54.229Z DEBUG modem << OK
2021-06-02T03:10:54.232Z DEBUG modem >> AT+COPS?
2021-06-02T03:10:54.239Z DEBUG modem << +COPS: 0
2021-06-02T03:10:54.240Z DEBUG modem << OK
2021-06-02T03:10:54.258Z DEBUG modem >> AT%XCBAND
2021-06-02T03:10:54.274Z DEBUG modem << %XCBAND: 0
2021-06-02T03:10:54.276Z DEBUG modem << OK
2021-06-02T03:10:54.281Z DEBUG modem >> AT+CGDCONT?
2021-06-02T03:10:54.299Z DEBUG modem << +CGDCONT: 0,"IP","nbiot","9.75.31.91",0,0
2021-06-02T03:10:54.301Z DEBUG modem << OK
2021-06-02T03:10:54.312Z DEBUG modem >> AT+CGACT?
2021-06-02T03:10:54.328Z DEBUG modem << +CGACT: 0,1
2021-06-02T03:10:54.329Z DEBUG modem << OK
2021-06-02T03:10:54.513Z DEBUG modem << +CEREG: 1,"61E6","090A8C16",9,,,"11100000","11100000"
2021-06-02T03:10:54.553Z DEBUG modem >> AT+COPS=3,2
2021-06-02T03:10:54.559Z DEBUG modem << OK
2021-06-02T03:10:54.561Z DEBUG modem >> AT+COPS?
2021-06-02T03:10:54.578Z DEBUG modem << +COPS: 0,2,"45204",9
2021-06-02T03:10:54.579Z DEBUG modem << OK
2021-06-02T03:10:54.595Z DEBUG modem >> AT%XCBAND
2021-06-02T03:10:54.602Z DEBUG modem << %XCBAND: 3
2021-06-02T03:10:54.605Z DEBUG modem << OK
2021-06-02T03:10:54.625Z DEBUG modem >> AT+CGDCONT?
2021-06-02T03:10:54.644Z DEBUG modem << +CGDCONT: 0,"IP","nbiot","9.75.31.91",0,0
2021-06-02T03:10:54.646Z DEBUG modem << OK
2021-06-02T03:10:54.661Z DEBUG modem >> AT+CGACT?
2021-06-02T03:10:54.679Z DEBUG modem << +CGACT: 0,1
2021-06-02T03:10:54.680Z DEBUG modem << OK
2021-06-02T03:10:55.088Z DEBUG modem << +CSCON: 1
2021-06-02T03:11:26.993Z DEBUG modem << +CSCON: 0
2021-06-02T03:11:53.671Z DEBUG modem << [00:29:10.996,765] [0m<inf> mqtt_simple: Publishing: Hello from nRF91 MQTT Simple Sample[0m
2021-06-02T03:11:53.674Z DEBUG modem << [00:29:10.996,795] [0m<inf> mqtt_simple: to topic: my/publish/topic len: 16[0m
2021-06-02T03:11:54.942Z DEBUG modem << +CEREG: 1,"61E6","090A8C17",9,,,"11100000","11100000"
2021-06-02T03:11:54.947Z DEBUG modem >> AT+COPS=3,2
2021-06-02T03:11:54.964Z DEBUG modem << OK
2021-06-02T03:11:54.968Z DEBUG modem >> AT+COPS?
2021-06-02T03:11:54.976Z DEBUG modem << +COPS: 0,2,"45204",9
2021-06-02T03:11:54.977Z DEBUG modem << OK
2021-06-02T03:11:54.996Z DEBUG modem >> AT%XCBAND
2021-06-02T03:11:55.012Z DEBUG modem << %XCBAND: 3
2021-06-02T03:11:55.013Z DEBUG modem << OK
2021-06-02T03:11:55.032Z DEBUG modem >> AT+CGDCONT?
2021-06-02T03:11:55.063Z DEBUG modem << +CGDCONT: 0,"IP","nbiot","9.75.31.91",0,0
2021-06-02T03:11:55.065Z DEBUG modem << OK
2021-06-02T03:11:55.086Z DEBUG modem >> AT+CGACT?
2021-06-02T03:11:55.114Z DEBUG modem << +CGACT: 0,1
2021-06-02T03:11:55.116Z DEBUG modem << OK
2021-06-02T03:11:55.285Z DEBUG modem << +CSCON: 1
2021-06-02T03:11:56.019Z DEBUG modem << +CEREG: 2,"61E6","090A8C17",9,0,0,"11100000","11100000"
2021-06-02T03:11:56.241Z DEBUG modem << +CSCON: 0
2021-06-02T03:11:56.827Z DEBUG modem << [00:29:14.141,479] [0m<inf> mqtt_simple: MQTT client disconnected: -57[0m
2021-06-02T03:11:56.828Z DEBUG modem << [00:29:14.141,510] [1;31m<err> mqtt_simple: mqtt_input: -57[0m
2021-06-02T03:11:56.832Z DEBUG modem << [00:29:14.141,510] [0m<inf> mqtt_simple: Disconnecting MQTT client...[0m
2021-06-02T03:11:56.849Z DEBUG modem << [00:29:14.141,571] [1;31m<err> mqtt_simple: Could not disconnect MQTT client: -57[0m
2021-06-02T03:11:56.850Z DEBUG modem << [00:29:14.141,571] [0m<inf> mqtt_simple: Reconnecting in 60 seconds...[0m
2021-06-02T03:11:57.167Z DEBUG modem << +CSCON: 1
2021-06-02T03:11:57.660Z DEBUG modem << +CEREG: 1,"61E6","090A8C17",9,,,"11100000","11100000"
2021-06-02T03:11:57.683Z DEBUG modem >> AT+COPS=3,2
2021-06-02T03:11:57.690Z DEBUG modem << OK
2021-06-02T03:11:57.693Z DEBUG modem >> AT+COPS?
2021-06-02T03:11:57.714Z DEBUG modem << +COPS: 0,2,"45204",9
2021-06-02T03:11:57.717Z DEBUG modem << OK
2021-06-02T03:11:57.744Z DEBUG modem >> AT%XCBAND
2021-06-02T03:11:57.768Z DEBUG modem << %XCBAND: 3
2021-06-02T03:11:57.771Z DEBUG modem << OK
2021-06-02T03:11:57.797Z DEBUG modem >> AT+CGDCONT?
2021-06-02T03:11:57.806Z DEBUG modem << +CGDCONT: 0,"IP","nbiot","9.45.186.255",0,0
2021-06-02T03:11:57.808Z DEBUG modem << OK
2021-06-02T03:11:57.833Z DEBUG modem >> AT+CGACT?
2021-06-02T03:11:57.840Z DEBUG modem << +CGACT: 0,1
2021-06-02T03:11:57.842Z DEBUG modem << OK
2021-06-02T03:12:28.043Z DEBUG modem << +CSCON: 0

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