OPCUASim

Cross-platform OPC UA simulation suite — pure Rust desktop apps built with egui and the async-opcua stack.

Binary	Role
OPCUAMaster	Master station / client — connect, browse, monitor, history, methods
OPCUAServer	Address-space simulator — folders, variables with simulation modes, optional writable nodes

中文文档

Features

OPCUAMaster — Client / Master Station

• OPC UA DA — connect to any OPC UA server, browse address space, read/write values
• Security — None / Sign / SignAndEncrypt; Anonymous, Username/Password, Certificate auth
• Endpoint discovery — query a server URL to enumerate available endpoints and their security profiles
• Lazy-loading address browser — infinite-depth tree, expand on demand
• Smart variable collection — pick an Object node to add all Variable descendants in one click
• Subscription + Polling — server push or client pull at a configurable interval, per-node DataChangeFilter
• Real-time table — searchable, multi-select with Ctrl/Cmd+Click, quality colour coding
• Value & Write panel — node attributes, manual read, value write back to writable nodes
• History (HA) — read raw history into a plot + table tab, quick ranges (1m … 24h)
• Method calls — auto-discover input/output arguments and invoke methods from the browser
• Communication log — bottom panel with direction filter, search, CSV export
• Project files — save/load all connections + groups as .opcuaproj
• Certificate manager — list, trust/reject, delete certificates in the local PKI

OPCUAServer — Address-Space Simulator

• Embedded OPC UA server — defaults to opc.tcp://0.0.0.0:4840
• Folder + Variable tree — add folders and variables under Objects
• Simulation modes — Static, Random, Sine, Linear (Repeat/Bounce), Script (evalexpr)
• Live values — variable values update at their per-node interval and stream to the UI
• Writable nodes — toggle RW to let clients write through
• Project files — save/load the entire address space as .opcuaproj

Development

Prerequisites

• Rust 1.77+
• A CJK font on your system (PingFang on macOS, Microsoft YaHei on Windows, Noto Sans CJK on Linux) for Chinese labels — auto-detected at startup

Build & Run

# Master station
cargo run -p opcuamaster-egui --release

# Server simulator
cargo run -p opcuaserver-egui --release

Project Structure

OPCUASim/
├── crates/
│   ├── opcuasim-core/          # Core library: client, server, browse, subscription, polling, history, methods
│   ├── opcuaegui-shared/       # Shared egui pieces: theme, widgets, fonts, tokio runtime handle, settings
│   ├── opcuamaster-egui/       # OPCUAMaster desktop app
│   └── opcuaserver-egui/       # OPCUAServer desktop app
├── pki/                        # Local PKI (trusted/rejected/own)
└── docs/                       # Design notes & implementation plans

Contributing

1. Fork and create a feature branch from master
2. cargo fmt and cargo clippy --workspace -- -D warnings before committing
3. Conventional commit prefixes: feat:, fix:, refactor:, docs:, chore:
4. Open a PR against master

Changelog

See CHANGELOG.md and the Releases page.

License

MIT