The MQTT protocol (What is MQTT?) is a widely used protocol in the IoT (Internet of Things). MQTT works according to the publisher/subscriber principle and operates via a central broker. This means that senders and recipients have no direct connection, but the data sources report their data via a publish and all recipients interested in certain messages (identified by the “topic”) receive the data because they have registered as subscribers.
In the industrial environment there are many sensors as publishers and superimposed systems as subscribers. In contrast to OPC UA, the data content of messages remains unspecified and is specified by the publisher. In OPC UA, on the other hand, the structures of the communicated data are predefined.
With the OPC Router as MQTT subscriber you can use data from MQTT Publisher and pass it on to any system via the other plug-ins (OPC UA, SAP, SQL Databases, Email, REST, etc.). As a MQTT publisher the OPC Router can send data from non-MQTT-enabled sources to a broker to provide any MQTT subscriber with data.
See also our Step by Step tutorials to connect the leading IoT platforms via MQTT:
Connect to the Azure IoT Hub with the MQTT Client
Connect the AWS IoT Cloud via MQTT
Connect the IBM Watson Platform via MQTT
Connecting Siemens MindSphere IoT via MQTT