Keywords:
IIoT, OPC UA, LoRaWAN, OpenWrt, Industry 4.0
Abstract
This article presents the integration of a long-range wireless sensor network, using LoRa technology, the LoRaWAN protocol and an OPC TCP network with the OPC UA standard. This proposal allows the creation of cyber-physical spaces where all elements can communicate in a secure, adaptable and scalable way, offering a IIoT (Industrial Internet of Things) connectivity solution, useful for Industry 4.0. Due to the specificities of each protocol (LoRa, LoRaWAN and OPC UA), developments in hardware, firmware and software are presented with the objective of obtaining an integrated solution capable of providing data from a LoRaWAN network directly to an HMI, using the OPC UA standard. Details of the embedded electronic system developed for the LoRa sensor nodes are presented. The implementation steps of the LoRaWAN - OPC UA Gateway, based on the OpenWrt system are also presented. Finally, the test results of the developed LoRa sensor nodes are discussed, as well as the integration with a SCADA operation interface, demonstrating the feasibility of the proposed integration.
