AWS_ERROR_MQTT_UNEXPECTED_HANGUP every 2 seconds

[abhiram43]

In AWS it just connecting and disconnecting within 2seconds. And my MQTT isnt showing any reading but my serial monitor showing the reading.

[jmklix]

Please check out our FAQ:

I keep getting AWS_ERROR_MQTT_UNEXPECTED_HANGUP

This could be many different things but it most likely is a policy issue. Start with using a super permissive IAM policy called AWSIOTFullAccess which looks like this:

{
    "Version": "2012-10-17",
    "Statement": [
        {
            "Effect": "Allow",
            "Action": [
                "iot:*"
            ],
            "Resource": "*"
        }
    ]
}

After getting it working make sure to only allow the actions and resources that you need. More info about IoT IAM policies can be found here.

If that doesn't work you can enable CloudWatch logging for IoT which will provide you with additional information that is not available on the client side sdk.

[jmklix]

marking this as answered for now, please let me know if you are still running into any problems

[github-actions[bot]]

Hello! Reopening this discussion to make it searchable.