MQTT is one of the most common messaging protocols used in the IoT world. Its lightweight structure and topic-based architecture enable fast and efficient message transmission, even over very low bandwidth. In this exercise, you will use the interoperability tools built into InterSystems IRIS for Health™ to construct a basic user portal that monitors live EKG readings from a set of remote patients. See how you can use a minimal amount of code to quickly take real-time data coming from an MQTT broker, then save and display it on a dashboard.