In its own way, every project in a manufacturing plant covers the collection of data from machines, sensors and RFID readers or the exchange of data between OT systems and higher-level IT applications. OPC servers are often deployed, and data is transferred via the OPC UA protocol.
Nevertheless, OPC UA is only one of several options. Among the widely used lightweight, simple solutions for data transfer, you will also find the MQTT protocol.
Introduced in 1999, MQTT has been here for quite some time. It was first used to monitor oil pipelines within the SCADA industrial control system. The goal of its developers, the companies IBM and Cirrus Link, was to have a bandwidth-efficient, lightweight protocol that would use little battery power. The devices on the pipelines were connected via a satellite link which, at that time, was extremely expensive.
The HiveMQ MQTT broker is developed by the company HiveMQ, which was founded in 2012 and is based in the Bavarian city of Landshut near Munich. With over 100 employees, HiveMQ is an active member of the OASIS MQTT Technical Committee, the Eclipse IoT Paho Project and MQTT Sparkplug.
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