In Chapter 4, Implementing the Industrial IoT Data Flow, we learned about the Open Platform Communications (OPC) protocol. We looked at how the features of its original implementation were based on the Microsoft COM/DCOM architecture. We also looked at how it evolved into its current Unified Architecture (UA) and how it uses open and inter-operable standards to overcome constraints and security issues. After that, we learned how to gather industrial data from different sources in different deployment scenarios, using the Edge Gateway and OPC UA. Finally, we briefly discussed the differences between the Edge Gateway and edge computation. In this chapter, we will look at how to implement a basic data flow with OPC UA and Node-RED.

We will carry out a practical example using the following:

• Prosys OPC UA
• Node-RED Edge Gateway