AWS IoT Core and MQTT 5

Question

Amazon announced MQTT 5 support

https://aws.amazon.com/about-aws/whats-new/2022/11/aws-iot-general-availability-version-5-mqtt-message-broker-mqtt5/

but it does not seem to work for AWS IoT Core. We get this error response

> CONNACK rc=0x84 Reason String CONNACK:MQTT5 is not supported on Symantec (iot Data) endpoint.:29689f9a-8d23-cd33-65a9-0fb536f55cd5

to a MQTT CONNECT, while MQTT 3.1.1 works as always. What do we need to do to use MQTT 5 with AWS IoT?

Accepted Answer

Hi,

MQTT5 is only supported on ATS endpoints.

Check also [this blog post](https://aws.amazon.com/blogs/iot/aws-iot-core-ats-endpoints/) on why the legacy Symantec endpoints should not be used and why you should migrate to ATS endpoints.

Additional documentation on the different endpoint type can be accessed at [Connecting devices to AWS IoT](https://docs.aws.amazon.com/iot/latest/developerguide/iot-connect-devices.html)

Cheers

Massimiliano

Answer

Thanks. It works now https://www.youtube.com/watch?v=Hf6WIVytWsc

AWS IoT Core and MQTT 5

Relevanter Inhalt