Create AWS IoT Core Things using AWS SDK

AWS IoT Core is a highly scalable platform for IoT devices. I automated the creation of Certificates, Things, and Attaching policy using AWS SDK with the below steps.

Step 1:

I created an IAM user with programmatic access and attached the AWSIoTFullAccess policy.

Step 2:

We will need to create Security Policy that can be attached to Certificates created for every device.

I have made a policy so that, the device can only connect using its ThingName as clientId, can subscribe or publish to topics starting from its ThingName.

{
  "Version": "2012-10-17",
  "Statement": [
    {
      "Effect": "Allow",
      "Action": "iot:Connect",
      "Resource": "*",
      "Condition": {
        "Bool": {
          "iot:Connection.Thing.IsAttached": [
            "true"
          ]
        },
        "ForAnyValue:StringEquals": {
          "iot:ClientId": [
            "${iot:Connection.Thing.ThingName}"
          ]
        }
      }
    },
    {
      "Effect": "Allow",
      "Action": "iot:Publish",
      "Resource": "arn:aws:iot:ap-south-1:021265781496:topic/${iot:Connection.Thing.ThingName}/*"
    },
    {
      "Effect": "Allow",
      "Action": "iot:Subscribe",
      "Resource": "arn:aws:iot:ap-south-1:021265781496:topicfilter/${iot:Connection.Thing.ThingName}/*"
    },
    {
      "Effect": "Allow",
      "Action": "iot:Receive",
      "Resource": "arn:aws:iot:ap-south-1:021265781496:topic/${iot:Connection.Thing.ThingName}/*"
    }
  ]
}

Step 3:

Code flow:

• We create a certificate for the device using the createKeysAndCertificate method.

• Attach policy to the certificate

• Create AWS IoT Core Thing

• Attach Certificate To Thing

Result:

The certificate which we just created is attached to Policy and Thing.

Output on the console:

Source Code: https://github.com/riddheshganatra/iotcore-createthings

Demo: https://www.loom.com/share/69b18339147742578bb82e635259b118

Share this with anybody you think would benefit from this. Have any suggestions? Feel free to message me on LinkedIn.