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Showing content from http://docs.aws.amazon.com/iot/latest/developerguide/iotanalytics-rule-action.html below:

IoT Analytics - AWS IoT Core

IoT Analytics

The AWS IoT Analytics (iotAnalytics) action sends data from an MQTT message to an AWS IoT Analytics channel.

Requirements

This rule action has the following requirements:

An IAM role that AWS IoT can assume to perform the iotanalytics:BatchPutMessage operation. For more information, see Granting an AWS IoT rule the access it requires.

In the AWS IoT console, you can choose or create a role to allow AWS IoT to perform this rule action.

The policy attached to the role you specify should look like the following example.
JSON
{ "Version": "2012-10-17", "Statement": [ { "Effect": "Allow", "Action": "iotanalytics:BatchPutMessage", "Resource": [ "arn:aws:iotanalytics:us-west-2:111122223333:channel/mychannel" ] } ] }

Parameters

When you create an AWS IoT rule with this action, you must specify the following information:

batchMode

(Optional) Whether to process the action as a batch. The default value is false.

When batchMode is true and the rule SQL statement evaluates to an Array, each Array element is delivered as a separate message when passed by BatchPutMessage to the AWS IoT Analytics channel. The resulting array can't have more than 100 messages.

Supports substitution templates: No

channelName

The name of the AWS IoT Analytics channel to which to write the data.

Supports substitution templates: API and AWS CLI only

roleArn

The IAM role that allows access to the AWS IoT Analytics channel. For more information, see Requirements.

Supports substitution templates: No

Examples

The following JSON example defines an AWS IoT Analytics action in an AWS IoT rule.

{
    "topicRulePayload": {
        "sql": "SELECT * FROM 'some/topic'", 
        "ruleDisabled": false, 
        "awsIotSqlVersion": "2016-03-23",
        "actions": [
            {
                "iotAnalytics": {
                    "channelName": "mychannel", 
                    "roleArn": "arn:aws:iam::123456789012:role/analyticsRole", 
                }
            }
        ]
    }
}