opcua2mqtt Technical Documentation & Engineering Reference

Complete specification and user manual for deploying opcua2mqtt across industrial Linux, Docker, and air-gapped systemd environments.

Documentation Sections

• POSIX Automated Quickstart — Deploy and verify in under 60 seconds.
• Architecture & Performance — Pure Rust memory model and multi-threaded event loop.
• Configuration Reference — Comprehensive config.toml schema and environment variable overrides.
• Store & Forward WAL — Embedded disk buffering and power-loss recovery.
• Eclipse Sparkplug B — UNS compliance, payload compression, and birth/death certificate management.
• Siemens S7 Integration — TIA Portal address spaces and DB browsing.
• Beckhoff TwinCAT Integration — ADS and TwinCAT OPC UA Server mapping.
• Prometheus & Health API — OT observability, scrape targets, and readiness probes.
• Management REST API — Local daemon administration and runtime diagnostics.