libplctag.NET is a .NET library providing two NuGet packages for industrial PLC communication via EtherNet/IP and Modbus TCP. The primary package (libplctag) offers a high-level, asynchronous, strongly-typed API built on top of the native libplctag C library, handling resource cleanup, exceptions, and event-driven operations. The second package (libplctag.NativeImport) exposes a low-level P/Invoke wrapper that manages platform-specific native binary loading and provides raw tag access. The architecture is a classic wrapper layer: the high-level Tag class encapsulates native handle lifecycle, attribute string generation, synchronous and async operations (using TaskCompletionSource with concurrent stacks to handle native callbacks), and exposes typed data accessors. The library targets a wide range of .NET frameworks (netcoreapp3.0 through net8.0, plus .NET Framework 4.7+), reflecting its industrial compatibility requirements. Some parts of the codebase (the generic Tag<M,T> and associated PlcMappers) are marked obsolete due to a planned API redesign (referenced as issue #406), indicating ongoing evolution.
This repository is a Java library for industrial communication protocols, providing implementations for Siemens S7 PLC, Modbus, Mitsubishi Melsec, RTSP/RTP/RTCP media streaming, and MP4 file format handling. The library features a modular architecture with clear separation by protocol, annotation-based serialization frameworks, and low-level utilities for binary data handling. It serves as an SDK for developers to integrate industrial device communication and media streaming capabilities into their applications. The code demonstrates consistent use of design patterns (builder, template method, annotation-based processing) and includes comprehensive test suites showing usage patterns.
FUXA is a full-stack web-based SCADA/HMI builder and runtime for industrial automation and IoT. It provides a visual editor (Angular + SVG) to create real-time dashboards, connect to field devices via 13+ protocols (Modbus, OPC UA, BACnet, Siemens S7, MQTT, etc.), and manage alarms, data acquisition (DAQ), scripting, scheduling, and user permissions. The backend (Node.js/Express) communicates with the frontend via Socket.IO for real-time device value updates. The system supports multiple time-series databases (SQLite, InfluxDB, QuestDB, TDengine) and can be deployed as a web server, Docker container, or Electron desktop app. It also integrates with Node-RED for low-code automation flows. The architecture is modular with a device driver factory pattern, JWT-based authentication, and a plugin system for extensibility. While the codebase is large and contains some monolithic components, it demonstrates solid engineering practices and has a rich set of reusable UI components and utility patterns.