The popular MQTT protocol is one of the most straightforward ways to connect distributed electronics, such as sensors, controllers, and data storage devices. As long as the transmitted messages follow the (lax) rules of the standard and the broker can be addressed correctly, the data exchange works. A new protocol called Sparkplug attempts to formalize the user data with an additional layer, which makes it easier to offer auxiliary services and create a diverse ecosystem, among other benefits. Here is a first look – including some practical examples, as always.