![]() In this article I will create an OPC UA server that will collect sensor data using Python and Node-Red, and the results will be shown in a Node-Red web dashboard. To better address new industrial requirements the OPC UA, (Open Platform Communications Unified Architecture) standard was created. The original OPC standard worked well but it had major limitations in the areas of Linux/embedded systems, routing across WANs, and new security concerns. The original OPC design was based on Microsoft’s Object Linking and Embedding (OLE) and it quickly became the standard for communications between control systems consoles, historians and 3rd party applications. To meet industrial requirements a communications standard called OPC (OLE for Process Control) was created. Some of the key industrial communications requirements include: security, multi-vendor connectivity, time tagging and quality indications. Industrial operations such as chemical refineries, power plants and mineral processing operations have quite different communications requirements than most IT installations.
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