DIIG: A Distributed Industrial IoT Gateway

Ongoing emphasis on the fourth industrial revolution requires further focus on the Internet of Things (IoT) as a means to integrate all relevant entities within a single technological system. In the integration process, a gateway to relay the raw data to an IoT endpoint is essential so that a joint interface among the heterogeneous domains can be provided. This work describes the development of a distributed industrial IoT gateway, called DIIG, able to relay industrial network data to a centralized data-store. DIIG exploits a real-time client server programming model based on S7 communication and Modbus TCP protocols. The subsequent analysis carried out on the testbed mainly focuses on the performance evaluation of the gateway. In order to achieve high performance data transmission in a fair environment, a parallel real-time communication mechanism has been proposed.