Model of Integration Gateway for Communication of OPC/MQTT Devices

This article deals with the challenge of how to integrate industrial devices that support either IoT protocols, such as MQTT devices with industrial de-facto standard protocol OPC UA. The main focus is paid on a model of integration gateway, which is designed to connect various devices and emulate device availability through the same application protocol. The goal is to create the model for bidirectional mapping of OPC variables to MQTT topics and validate proposed model in the lab environment.