Writing IOT Data to S3

Question

So am receiving data via IOT core.  Applying a rule to route the data to S3.

You can see the it "last modified" update but when I look for entries it is empty?

CloudWatch is giving me the following:	{"timestamp":"2022-02-07 02:04:46.802","logLevel":"INFO",].....","status":"Success","eventType":"RuleExecution","clientId":"MKR1010","topicName":"MKR1010/pub","ruleName":"mkr1010tos3","ruleAction":"S3Action","resources":{"Bucket":"mkr1010s3","Key":"mkr1010"},"principalId":"2b035d1e541ac061be9a5498254aff0e21c771b2a96e470a7b2a287fc6f34b59"}

Not quite sure why.

When I change to rule to send it to a dynamoDB...then the data is being stored as expected.

I know that S3 is not the best way to do this but I would like to know what is missing when the CloudWatch logs show successful execution??

Thanks

John · Answer

For anyone who else might face an issue where they create a rule with the action to store a message to S3 make sure you check the following:
1. Check the "MQTT test client" to make sure that your messages are coming into the desired topic
2. Make sure that your rule is using an IAM role that has the necessary permissions to put objects into your specified bucket
3. Also make sure that the region of your S3 bucket is the same as your IoT Core region

Writing IOT Data to S3

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