Interconnecting and Monitoring Heterogeneous Things in IoT Applications

Abstract

Internet of Things (IoT) applications incorporate heterogeneous devices that employ different middleware protocols (MQTT, CoAP, WebSocket, etc). In this paper we present an extension of our cross-integration platform which supports the interoperability of IoT devices. In particular, we introduce the VSB Web Console which enables the development and monitoring of applications with heterogeneous IoT devices. We showcase our approach using the Fire Detection scenario.

Automated synthesis of mediators for middleware-layer protocol interoperability in the IoT

“…Moreover, an automated mediator synthesis process is essential for IoT applications that require dynamic, runtime composition of heterogeneous Things without human intervention. Our DeXMS framework 2 (initially developed under the name of VSB ) [22,43] can be leveraged by application developers to support the automated execution of mediator synthesis.…”

“…DeXMS was originally developed as core component (under the name of VSB) of the H2020 CHOReVOLU-TION European project [44] to support heterogeneous interactions in choreographies of services and Things. Currently, DeXMS supports the following middleware protocols: REST, CoAP, MQTT, WebSockets and DPWS (additional implementation details are provided in [22,43]). We evaluate the DeXMS framework (development and runtime environment) with respect to two criteria: (i) the support offered to developers when developing a new IoT application that may contain several heterogeneous Things; and (ii) the runtime performance of the synthesized mediators in terms of latency as well as resource consumption on the hosting node, under both low traffic and stress conditions.…”