Can you please provide the steps to unsubscribe using MQTT .
Here's my best shot in answering your question:
The "MQTT Extensions" package, which can be downloaded from the Parasoft Marketplace, extends SOAtest and Virtualize with various tools for MQTT. In particular, the MQTT Subscriber tool can be used to subscribe to a topic and then unsubscribe. After the subscription is created, the Subscriber tool will end its subscription automatically based on the configured "Subscription Duration" and "Max Messages" settings. Those limits control when the subscription is terminated after being created. The "MQTT Extensions" includes documentation in pdf format with detail about about the MQTT extensions and their various configuration options.