Integrations

OPC UA to Microsoft Fabric, without a script.

Read the OPC UA nodes with MaestroHub on site, give them names, units and quality, and write them into a Fabric lakehouse through OneLake with Entra ID authentication. Outages to Azure are buffered on disk.

The flow

One value, from the machine to Microsoft Fabric. Illustrative.

OPC UAindustrial protocolns=2;s=Boiler1.Steam

MaestroHub

Boiler 1 steam flow · 8.2 t/h · Good

named, unit, quality
origin stamped
buffered on disk

Microsoft Fabriclakehouse (OneLake)Files/plant/boiler1/

Why do it with MaestroHub

More than a pipe from OPC UA to Microsoft Fabric.

Enterprise identity all the way

Writes use a service principal or managed identity in Entra ID, the way your IT team already secures Fabric.

Clean lakehouse files from day one

Named, typed values with quality, instead of raw node dumps.

Runs on site, not in the cloud

MaestroHub sits next to the machines and only sends what you choose to Fabric.

What lands in Microsoft Fabric

An example. You choose the fields in the pipeline.

ts	asset	signal	value	unit	quality
2026-10-03 06:00:01	utilities/boiler1	steam_flow	8.2	t/h	good

Set it up in three steps

1
Connect OPC UA
Add the OPC UA server, browse its address space and pick the nodes, or add hundreds at once with bulk creation.
2
Give the values meaning
Map each value to a topic in the namespace with its name, unit and schema. Quality and origin are stamped on every value.
3
Deliver to Microsoft Fabric
Add a OneLake output with Entra ID credentials and write to the lakehouse's Files or Tables area.

Before you start

What each side needs, from the connector documentation.

OPC UA

The server address, built as opc.tcp://host:port/path. The standard OPC UA port is 4840.
For any Security Policy other than None, a client certificate: paste your own (RSA keys only) or let MaestroHub generate a self-signed one.
If you use the auto-generated certificate, the OPC UA server administrator must trust it on the server.
A username and password when the server does not allow Anonymous access.

Example settings

Server Hostname: opcua.example.com
Port: 4840
Security Policy: Basic256Sha256
Security Mode: SignAndEncrypt
Certificate Mode: Auto-generate (self-signed)
Authentication Type: UsernamePassword

OPC UA connector documentation

Microsoft Fabric

The Fabric workspace and lakehouse, by ID (GUID) or by name. Give the lakehouse name without the .Lakehouse suffix.
A Microsoft Entra ID identity: a service principal (tenant ID, client ID, client secret), a managed identity when MaestroHub runs on Azure, or the default credential chain.
Contributor, or a OneLake data role, on the target workspace for that identity.

Example settings

Authentication Method: service_principal
Workspace: <your-workspace>
Lakehouse: <your-lakehouse>
Tenant ID: <your-tenant-id>
Client ID: <your-client-id>
Default Scope: Files

Microsoft Fabric connector documentation

Things to know

Pitfalls and limits the documentation calls out, so they don't surprise you on site.

OPC UA

Security Policy and Security Mode must agree. Policy None requires Mode None. Any other policy requires Sign or SignAndEncrypt.
Node identifiers need a namespace index and a type prefix (i=, s=, g=, b=). Namespace 0 is typically standard nodes, 2 and up custom nodes. Browse a small scope first to find the exact IDs.
On Monitor functions, set the sampling interval equal to or faster than the publishing interval, or changes can be missed. Subscriptions are recreated automatically after a lost connection or a session timeout.

Limits

Manual client certificates support RSA keys only. Auto-generated certificates are RSA 2048-bit and valid for 365 days.
Monitor functions cannot be created through Quick Add. Use the full Function Builder.

Microsoft Fabric

A Parquet file written under Tables/ does not become a table; it lands in the unidentified area. Write it under Files/ and convert it with Load to Tables, a notebook, or the Fabric Load Table REST API.
Set Input Format to base64 for binary files such as Parquet. Left on text, the base64 characters themselves are uploaded and no Parquet reader can open the file.
Paths that do not start with Files/ or Tables/ get the Default Scope prepended (Files by default).

Limits

The connector writes files only. It does not run SQL, manage Fabric items or create tables.
Files are limited to 124 MB (25 MB by default), measured on the decoded bytes.

What teams use it for

Power BI on plant data

Operational KPIs in reports alongside finance and supply chain.

Utility and energy tracking

Steam, power and water per asset for cost allocation.

Data science in Fabric

Notebooks on clean, quality-flagged time series.

Ways to connect OPC UA to Microsoft Fabric

In general terms. Check any specific product for its own details.

Compare a custom script, a flow tool, a cloud vendor's edge service and MaestroHub

Swipe sideways to see every column

	A custom script	A flow tool	A cloud vendor's edge service	MaestroHub
Talks OPC UA	A library you choose	Community plug-ins	Depends on the vendor	Built in, one of 90+ connectors
Names, units and schema	You write it	You build it	Partly, in the vendor's model	One governed namespace
Quality on every value	You write it	You build it	Depends on the vendor	Built in, carried through calculations
Where each value came from	You write it	You build it	Depends on the vendor	Stamped on every value
Survives a network outage	You build it	You build it	Usually, to that vendor's cloud	On disk, per destination, in order
Several destinations at once	One script each	Yes, flow by flow	Mostly that vendor's cloud	Any mix, each with its own buffer
Permissions and audit	You build it	You build it	Cloud account permissions	Roles, single sign-on, audit trail
AI agents can use the data	You build it	You build it	Depends on the vendor	Through the MCP server

Questions

How do I send OPC UA data to Microsoft Fabric?

Do I need to write code to connect OPC UA to Microsoft Fabric?

No. You configure the OPC UA connection and the Microsoft Fabric output in MaestroHub and join them with a pipeline. Transformations can be added where you need them.

Where does MaestroHub run for this?

On your own infrastructure next to the machines: an edge box, a virtual machine or Kubernetes. Nothing has to leave your network.

Why not just write a script for OPC UA to Microsoft Fabric?

A script works on day one. The cost comes later: decoding and naming values, handling bad quality, buffering through outages, keeping credentials safe, and doing it again for the next machine and the next destination. MaestroHub does those once, for every connector.

What else can OPC UA data go to?

More than 90 connectors are included in every edition, among them historians, databases, cloud warehouses, message brokers and business systems, so the same values can feed several destinations at once.

Other integrations

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