This is a collection of code examples for working with the HiveMQ Extension System and the HiveMQ MQTT Client.

• math-challenge-extension: An example HiveMQ Extension to demonstrate challenge response authentication.
• math-challenge-client: An example MQTT client to demonstrate challenge response authentication.

• An example how to test a full MQTT implementation using the official HiveMQ Testcontainer.

• hivemq-ce-testcontainer: An example how to setup HiveMQ Testcontainers for testing MQTT client applications with JUnit 4 or JUnit 5.

To try out the cloud hosted version of HiveMQ, simply use the hivemq-getting-started-cloud module. Enter your host, username and password like it is described in the comments and on the website. Then you can see, how an example-implementation would work.

To try out the publicly hosted version of HiveMQ, simply use the hivemq-getting-started-public module. It will connect to "broker.hivemq.com", which is the publicly available broker of HiveMQ. Run the program, and you can see how an example-implementation would work.