MQTT Inspector

The MQTT Inspector allows you to see MQTT incoming topics and messages and the format of the data payload.

A list of the messages and topics is shown so you will know what topics are available.
Figure 1.
When a new message is received, all the information displayed, and you have direct access to the appropriate clicking the arrow button. Note you can also see the history of messages received, the timestamp, the topic, and other items.
Figure 2.