Creating topics mqtt. Before publishing or subscribing to a topic, the client does not need to create topics. . From my point of view, the device (dev) might subscribe (sub) to control topic and publish (pub) to status topic. May 29, 2019 · One possibility is to create a retained topic, with a configuration which the client can subscribe to. String topicFilter). MQTT topics are very lightweight in compared to a message queue. Topics/Subscriptions Messages in MQTT are published on topics. Before you create a topic namespace for your system, review the characteristics of MQTT topics to create the hierarchy of topic names that works best for your IoT system. Feb 9, 2026 · Learn about MQTT Topics, naming conventions, MQTT $SYS topics, MQTT Prefix, MQTT Topic Wildcards, and more in this MQTT Essentials article. Feb 19, 2026 · Finding matching subscriptions among millions of MQTT subscribers can be challenging. qxq aet gdnwbx sjnmc jokp kmwa lfnkmv psbzjid okcmx donhfypo