This white paper explains how MQTT, a lightweight publish/subscribe messaging protocol, enables efficient integration of devices within IoT and surveillance ecosystems. Unlike traditional request-response protocols, MQTT allows one-to-many and many-to-many communication through a central broker, making it ideal for distributing event data across multiple systems. The paper outlines key benefits such as reduced bandwidth usage, improved scalability, enhanced security, and simplified integration with cloud platforms. It also discusses limitations, including dependency on the broker and lack of suitability for continuous video streaming. Through real-world examples like people counting and alarm triggering, the paper demonstrates how MQTT enables flexible, real-time data exchange in modern co

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