https://www.emqx.com/en/blog/an-introduction-to-subscription-options-in-mqtt
MQTT Subscription Options Explained and Example | MQTT 5 Features | EMQ
In this article, we will focus on exploring the available subscription options in MQTT and their usage.
mqtt subscriptionfeatures emq
https://www.emqx.com/en/blog/subscription-identifier-and-subscription-options
MQTT Subscription Identifier Explained and Example | MQTT 5 Features | EMQ
Explain what is Subscription Identifier in MQTT and how it works. Demonstrate how to set a Subscription Identifier for subscription through an example.
mqtt subscriptionfeatures emq