MQTT Messages stored somewhere

Question

Hello Community,

i am receiving MQTT Messages from an external device into AWS IoT Core. 
It is sending since 01.08.2013 
When i created rules to save the values into DynamoDB on 08.08.2023. What is with the MQTT Messages that were coming in from the 01.08 - 08.08? 
Are they stored somewhere? Can i access them or are they lost?

Accepted Answer

Hi @energis,

Your messages are lost if no other MQTT client subscribe to the messages published by your external device during 01.08 and 08.08, or if you did not configure an AWS IoT Rule and Action to persist the messages into a database on AWS.

If you activated Logging at DEBUG level in AWS IoT as describe [here](https://docs.aws.amazon.com/iot/latest/developerguide/cloud-watch-logs.html) , you can browse the external device activity in Amazon CloudWatch, but without the payload.

Hope that helps.

MQTT Messages stored somewhere

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