MergenHub 
Install, publish, operate
Step-by-step installation, publishing on a domain, firewall and HTTPS, Windows services and logs, and every module explained with real screenshots.
What MergenHub is
Architecture, modules, services, data flow and where things live on disk.
Read →Installation
Requirements, the setup wizard step by step, what the installer does, upgrade and clean install.
Read →Quick start: first live data
Sign in, add a channel, a device and tags, see live values, connect an OPC UA client.
Read →Publishing on a domain
DNS, port forwarding, HTTPS certificates, reverse proxy (IIS / nginx / Caddy), remote OPC UA.
Read →Windows Firewall and ports
Which ports MergenHub uses, the rules the installer adds, how to open or restrict them.
Read →Windows services and the tray app
The three services, startup and crash recovery, the system tray manager, running without a logged-in user.
Read →Logs and diagnostics data
Every log MergenHub writes: file logs, event log, audit log, historian database, installer log; retention and locations.
Read →Licensing and trial mode
Trial limits, online and offline activation, releasing and moving a license, subscriptions and maintenance.
Read →Backup, restore, upgrade, uninstall
What to back up, project export/import, in-place upgrades, uninstalling.
Read →Channels, devices and tags
The project hierarchy, scan rates and scan modes, scaling, tag groups, addressing helpers, tag generation.
Read →Protocol drivers
Modbus, Siemens S7, OMRON, DNP3, IEC 104, IEC 61850, MQTT, OPC UA client, simulator — what each supports.
Read →OPC UA server
Endpoints, security policies, certificates, the address space, system tags, history access, alarms over UA.
Read →REST API
Authentication, configuration API, live values, writes, Swagger, examples in curl.
Read →Data Bridge (IoT gateway)
REST server, REST client and MQTT client agents; payload formats; Kepware-compatible endpoints.
Read →Advanced (virtual) tags
Expression engine, average/min/max, totalizer, derived, link, Oracle cumulative tags; function reference.
Read →Alarms and notifications
ISA-18.2 lifecycle, conditions, deadband, e-mail and SMS, per-user preferences, alarm history.
Read →Historian (data logger)
Log groups, triggers, SQLite or ODBC targets, store-and-forward, trends and export.
Read →SCADA / HMI
Editor, symbol libraries, pipes and flow animation, bindings, faceplates, operator view, templates.
Read →Users, groups and security
Roles and permissions, resource ACL, HTTPS, session policy, audit, hardening checklist.
Read →AI assistant (MCP server)
Connecting AI assistants over MCP, OAuth and tokens, the tool set, what it can and cannot do.
Read →Automation (workflows)
Drag-and-drop flow editor: schedule/tag/alarm/webhook triggers, conditions and calculations, write-tag, email, SMS and HTTP actions; live run monitoring; building with the assistant.
Read →In-app AI assistant
Choosing a provider (cloud and local LLMs), permissions and consent, network diagnostics, SCADA screen design, attachments, skills, context management.
Read →Troubleshooting
Device diagnostics and packet traces, common errors and their fixes, where to look first.
Read →MergenHub Mobile (iOS and Android)
Server mode and phone mode, preparing the server, live values, writes, alarm acknowledge, SCADA screens, push notifications, screen editor, the Add device wizard, security, troubleshooting.
Read →Creating device templates (packages)
The .mhpkg.json format: parameters, channels-devices-tags, calculated tags and expression functions, alarms, server and phone screen sets, validation, a complete example, the AI skill, getting a device into the library.
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