The full source code demonstrated in the video is available here: In this conversation, Ivan Judson, a Solution Architect at Harper, discusses the MQTT protocol, its significance in IoT, and how it integrates with Harper's application platform. He explains the basic concepts of MQTT, including its lightweight nature, the broker-client architecture, and the publish-subscribe model. Ivan also demonstrates how to implement MQTT within Harper, showcasing its real-time messaging capabilities and advanced features like message retention. The discussion further explores MQTT's compatibility with various programming languages and tools, emphasizing Harper's user-friendly approach to building applications. Ivan concludes with insights into the future of MQTT and Harper's potential to revolutionize development processes. Chapters 00:00 Introduction to MQTT and Harper 03:05 Understanding MQTT: The Basics 05:48 Harper's Integration with MQTT 08:52 Implementing MQTT with Harper 11:56 Advanced Features of MQTT in Harper 14:43 Client Agnosticism and Protocol Support 17:27 Future Directions and Closing Thoughts