Python Programming for Arduino

MQTT – A lightweight messaging protocol

Just like REST, pub/sub is one of the most popular messaging patterns, mostly deployed to transfer short messages between nodes. Instead of deploying client-server-based architecture, the pub/sub paradigm implements messaging middleware called a broker to receive, queue, and relay messages between the subscriber and publisher clients:

The pub/sub architecture utilizes a topic-based system to select and process messages, where each message is labeled with a specific topic name. Instead of sending a message directly to the subscriber, the publisher sends it first to the broker with a topic name. In a totally ...