Unable to connect to IoT Core

[hoso3392]

Nice to meet you
I would like to connect Cloud9 devices to IoT Core using this SDK,
based on the instructions in "AWS IoT Developer Day - with IoT TwinMaker".

However, follow the steps, and the "Connect AWS IoT Core" in "3.Connect IoT Sitewise"
when I run

$ sudo . /start.sh

the following error message is displayed.

Traceback (most recent call last):

  File "aws-iot-device-sdk-python-v2/samples/pubsub.py", line 83, in <module>
    connect_future.result()
  File "/usr/lib64/python3.7/concurrent/futures/_base.py", line 435, in result
    return self.__get_result()
  File "/usr/lib64/python3.7/concurrent/futures/_base.py", line 384, in __get_result
    raise self._exception
awscrt.exceptions.AwsCrtError: AWS_ERROR_MQTT_UNEXPECTED_HANGUP: The connection was closed unexpectedly.

I would like to know the solution.
I'm a beginner, so I apologize if I lack the necessary information.

[jmklix]

You probably did not add the proper permissions that allows you to connect and use the required resources. If this is the guide that you are following make sure to follow step 1 where you add the Role and Policy:

Role JSON:

{   
    "Version":  "2012-10-17",   
    "Statement":[ 
        {
            "Sid":  "",
            "Effect":  "Allow",       
            "Principal": {            
                "Service": [                
                    "iottwinmaker.amazonaws.com"             
                ]        
            },        
        "Action":  "sts:AssumeRole"       
        }    
    ]
} 

Policy JSON:

{
    "Version": "2012-10-17",
    "Statement": [
        {
            "Action": [
                "iottwinmaker:*",
                "s3:*",
                "iotsitewise:*",
                "kinesisvideo:*"
            ],
            "Resource": [
                "*"
            ],
            "Effect": "Allow"
        },
        {
            "Action": [
                "lambda:invokeFunction"
            ],
            "Resource": [
                "*"
            ],
            "Effect": "Allow"
        },
        {
            "Condition": {
                "StringEquals": {
                    "iam:PassedToService": "lambda.amazonaws.com"
                }
            },
            "Action": [
                "iam:PassRole"
            ],
            "Resource": [
                "*"
            ],
            "Effect": "Allow"
        }
    ]
}

You can also check out the FAQ and AWS Docs for more info about this.

[github-actions[bot]]

Hello! Reopening this discussion to make it searchable.