A Smart Gateway Enabling OPC UA and DDS Interoperability

Interoperability is one of the major challenges of adoption of the Industrial Internet of Things. OPC UA is one of the main industrial standards for the Request-reply messaging pattern, and DDS is one of the main industrial standards for the Publish-subscribe messaging pattern. How to ensure data is communicated, understandable, and interoperable between the systems implemented by OPC UA and DDS is an industrial concern to address. This study proposes a novel middleware solution which enables effective communication between these two message patterns. We evaluate our work by testing the middleware's performance on a scenario using a Raspberry Pi and the software middleware connected to a private LAN, measuring response times and reliability.