A new batch of OPCPublisher direct methods

Update: As seen here, this functionality is only available of the OPCPublisher version 2.5 and below. You can upvote this feature request.

Recently, Microsoft put some real effort into updating the OPCPublisher project. This application/IoT Edge Module ingests telemetry from an OPC-UA Server.

I already wrote two blogs about it: Getting started with OPC-UA on Azure IoT Edge and Managing nodes from the cloud in the OPC-UA Publisher Edge. The seconds one showed how to connect to the OPCPublisher as an IoT Edge module using DirectMethods.

New methods have arrived, this time we get information about the module itself.

Let’s check them out.

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Managing nodes from the cloud in the OPC-UA Publisher Edge

Update: The Direct methods of the IoT Edge OPC-UA publisher are recently depricated. Please check the new Rest API for the new format.

In my previous blog, we learned how to get started with the Azure IoT Edge module named OPC Publisher.

This module makes it possible to extract data from a ‘local’ OPC-UA server and to expose this data to the Azure IoT Hub. The data is sent using the routing feature within Azure IoT Edge so before we sent the data to the cloud, we first can have an insight in the actual data, take actions locally and transform the data.

But the OPC Publisher connects to the OPC-UA server based on local settings. Here is the configuration, taken from my c:\iiot\pn.json file:

    "EndpointUrl": "opc.tcp://[IP address]:53530/OPCUA/SimulationServer",
    "UseSecurity": false,
    "OpcNodes": [
        "Id": "ns=5;s=Counter1"
        "Id": "ns=5;s=Random1"

These settings are ‘hardcoded’, the file is on the file system, not in Docker.

Can we change these settings remotely, using the cloud?

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