AWS IoT Construct Library

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The APIs of higher level constructs in this module are experimental and under active development. They are subject to non-backward compatible changes or removal in any future version. These are not subject to the Semantic Versioning model and breaking changes will be announced in the release notes. This means that while you may use them, you may need to update your source code when upgrading to a newer version of this package.

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AWS IoT Core lets you connect billions of IoT devices and route trillions of messages to AWS services without managing infrastructure.

TopicRule

Create a topic rule that give your devices the ability to interact with AWS services. You can create a topic rule with an action that invoke the Lambda action as following:

func = lambda_.Function(self, "MyFunction",
    runtime=lambda_.Runtime.NODEJS_LATEST,
    handler="index.handler",
    code=lambda_.Code.from_inline("""
            exports.handler = (event) => {
              console.log("It is test for lambda action of AWS IoT Rule.", event);
            };""")
)

iot.TopicRule(self, "TopicRule",
    topic_rule_name="MyTopicRule",  # optional
    description="invokes the lambda function",  # optional
    sql=iot.IotSql.from_string_as_ver20160323("SELECT topic(2) as device_id, timestamp() as timestamp FROM 'device/+/data'"),
    actions=[actions.LambdaFunctionAction(func)]
)

Or, you can add an action after constructing the TopicRule instance as following:

# func: lambda.Function


topic_rule = iot.TopicRule(self, "TopicRule",
    sql=iot.IotSql.from_string_as_ver20160323("SELECT topic(2) as device_id, timestamp() as timestamp FROM 'device/+/data'")
)
topic_rule.add_action(actions.LambdaFunctionAction(func))

You can also supply errorAction as following, and the IoT Rule will trigger it if a rule’s action is unable to perform:

import aws_cdk.aws_logs as logs


log_group = logs.LogGroup(self, "MyLogGroup")

iot.TopicRule(self, "TopicRule",
    sql=iot.IotSql.from_string_as_ver20160323("SELECT topic(2) as device_id, timestamp() as timestamp FROM 'device/+/data'"),
    error_action=actions.CloudWatchLogsAction(log_group)
)

If you wanna make the topic rule disable, add property enabled: false as following:

iot.TopicRule(self, "TopicRule",
    sql=iot.IotSql.from_string_as_ver20160323("SELECT topic(2) as device_id, timestamp() as timestamp FROM 'device/+/data'"),
    enabled=False
)

See also @aws-cdk/aws-iot-actions-alpha for other actions.

Logging

AWS IoT provides a logging feature that allows you to monitor and log AWS IoT activity.

You can enable IoT logging with the following code:

iot.Logging(self, "Logging",
    log_level=iot.LogLevel.INFO
)

Note: All logs are forwarded to the AWSIotLogsV2 log group in CloudWatch.