Filter on Thing Group at MQTT presence topic in AWS IoT

Question

Hello,

as we are having DEV and PROD on the same AWS account, we would like to filter for attributes or Thing Group when subscriping to the `$aws/events/presence/+/+` topic.
Is there a way to do this without further business logic by just using some wildcard-magic?

Thank you in advance

Daniel

Greg_B · Answer

Hi. The short answer is no.

If you had strong conventions around your client ID naming, you might be able to use a where clause like this `WHERE startswith(topic(5),"foobar") = true`.

This old answer gives a great treatment of other options: https://repost.aws/questions/QUB6KIB7m0SOatcdP8HhA3zQ/filter-on-thing-group-from-aws-iot-rule. Including a recommendation to separate DEV and PROD into separate accounts. I strongly recommend you do that.

Filter on Thing Group at MQTT presence topic in AWS IoT

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