aws_iot: Cloud MQTT input error: -128

[LMTech]

Hello,

I am receiving MQTT input error for my AWS IoT connection. Docs says it is an AWS policy problem here (https://nordicsemiconductor.github.io/asset-tracker-cloud-docs/saga/docs/devices/TroubleShooting.html#error-code-128)

My AWS Thing policy is as follows:

{
   "Version": "2012-10-17",
   "Statement": [{
         "Effect": "Allow",
         "Action": "iot:Connect",
         "Resource": "arn:aws:iot:us-west-1:account:client/*"
      },
      {
         "Effect": "Allow",
         "Action": "iot:Publish",
         "Resource": [
            "arn:aws:iot:us-west-1:account:topic/$aws/things/*/shadow/update",
            "arn:aws:iot:us-west-1:account:topic/$aws/things/*/shadow/delete",
            "arn:aws:iot:us-west-1:account:topic/$aws/things/*/shadow/get"
         ]
      },
      {
         "Effect": "Allow",
         "Action": "iot:Receive",
         "Resource": [
            "arn:aws:iot:us-west-1:account:topic/$aws/things/*/shadow/update/accepted",
            "arn:aws:iot:us-west-1:account:topic/$aws/things/*/shadow/delete/accepted",
            "arn:aws:iot:us-west-1:account:topic/$aws/things/*/shadow/get/accepted",
            "arn:aws:iot:us-west-1:account:topic/$aws/things/*/shadow/update/rejected",
            "arn:aws:iot:us-west-1:account:topic/$aws/things/*/shadow/delete/rejected"
         ]
      },
      {
         "Effect": "Allow",
         "Action": "iot:Subscribe",
         "Resource": [
            "arn:aws:iot:us-west-1:account:topicfilter/$aws/things/*/shadow/update/accepted",
            "arn:aws:iot:us-west-1:account:topicfilter/$aws/things/*/shadow/delete/accepted",
            "arn:aws:iot:us-west-1:account:topicfilter/$aws/things/*/shadow/get/accepted",
            "arn:aws:iot:us-west-1:account:topicfilter/$aws/things/*/shadow/update/rejected",
            "arn:aws:iot:us-west-1:account:topicfilter/$aws/things/*/shadow/delete/rejected"
         ]
      },
      {
         "Effect": "Allow",
         "Action": [
            "iot:GetThingShadow",
            "iot:UpdateThingShadow",
            "iot:DeleteThingShadow"
         ],
         "Resource": "arn:aws:iot:us-west-1:account:thing/*"

      }
   ]
}

Please advice if you see something wrong!

Thanks in advance.

``

[Maria Gilje]

Hello,

Thank you for your patience.

We need some more information to be able to help with this.

Which application is your nRF9160 running? Are you working with an application or sample from the nRF Connect SDK, for example the nRF9160: Asset Tracker v2 application?

Please also share the log where you got the error message from.

Kind Regards,
Maria

[LMTech]

Hello,

thanks for reaching out. We are using asset tracker v2. I can generate a new app with debug. Would that help? 
In the current version, it only outputs the following error:

aws_iot: Cloud MQTT input error: -128

[LMTech]

Maria Gilje here is the log from Link Monitor without debug from POR:

%CESQ: 66,3,22,3

+CEREG: 2,"3BA6","0157B906",7

[00:00:02.314,514] [0m<inf> event_manager: MODEM_EVT_LTE_DISCONNECTED[0m

[00:00:02.321,685] [0m<inf> event_manager: MODEM_EVT_LTE_CELL_UPDATE[0m

+CSCON: 1+CGEV: ME PDN ACT 0,0

+CNEC_ESM: 50,0

+CEREG: 5,"3BA6","0157B906",7,,,"00001010","11000001"

+CIND: "service",1

+CIND: "roam",1

%XTIME: "2B","3210034082032B","00"

[00:00:04.820,648] [0m<inf> event_manager: MODEM_EVT_LTE_CONNECTED[0m

[00:00:04.827,545] [0m<inf> event_manager: MODEM_EVT_LTE_PSM_UPDATE[0m

[00:00:04.834,503] [0m<inf> event_manager: DATA_EVT_DATE_TIME_OBTAINED[0m

[00:00:04.842,163] [1;33m<wrn> cloud_module: Cloud connection establishment in progress[0m

[00:00:04.850,250] [1;33m<wrn> cloud_module: New connection attempt in 32 seconds if not successful[0m

[00:00:04.859,680] [0m<inf> event_manager: CLOUD_EVT_CONNECTING[0m

AT+CGDCONT?+CGDCONT: 0,"IP","ibasis.iot","10.165...",0,0OK

[00:00:04.938,293] [0m<dbg> aws_iot.broker_init: IPv4 Address found 52.53...[0m

AT+COPS=3,2OK

AT+CGACT?+CGACT: 0,1OK

AT+COPS?+COPS: 0,2,"310260",7OK

AT%XCBAND%XCBAND: 12OK

AT+CGDCONT?+CGDCONT: 0,"IP","ibasis.iot","10.165...",0,0OK

AT+CGACT?+CGACT: 0,1OK

[00:00:07.628,387] [0m<dbg> aws_iot.connect_client: Using send socket timeout of 60 seconds[0m

[00:00:07.636,871] [0m<dbg> aws_iot.aws_iot_cloud_poll: AWS IoT broker connection request sent[0m

[00:00:09.924,652] [0m<dbg> aws_iot.mqtt_evt_handler: MQTT_EVT_DISCONNECT: result = -128[0m

[00:00:09.932,922] [0m<inf> event_manager: CLOUD_EVT_DISCONNECTED[0m

[00:00:09.939,636] [1;31m<err> aws_iot: Cloud MQTT input error: -128[0m

[Maria Gilje]

Hello,

Thank you for your patience.

It is not clear what the direct cause of your problem is.

Make sure that you have set up your AWS IoT cloud service by following the procedure here.

If you still have issues, please perform a modem trace and attach it to your next reply.

Best Regards,
Maria

[LMTech]

Thank you, I will double check.

Can you help point me to how to perform a modem trace? is that something I can do from the Link Monitor App?

Best

--L