MQTT – enabling edge-device connectivity in the IIoT era


Although the MQTT protocol has been around for nearly three decades, the design of the protocol makes it ideal for IIoT (Industrial Internet of Things) applications, the latest trend in automation engineering. This is particularly true for applications that stress “active notification,” in which devices provide data only when needed, as opposed to “passive notification,” in which devices are polled at regular intervals. MQTT’s broker/client design eliminates the need for all devices in the system to be online at the same time. The clients (i.e., “devices” or “things”) communicate directly with the broker, which plays the role of middleman to pass messages back and forth between clients.

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