intersystemsdc/opcua-mockserver repository overview

⁠OPC-UA Mock Server

⁠Usage instructions

You need to have a folder with a single file on it that will contain the data you want to mock. Once the server starts, it will read that file. Here is the structure of the file:

• The first line of the file define the name of the OPC-UA nodes
• The second line of the file define the data types of the OPC-UA nodes. The current supported data types are:
  • INT64
  • DATETIME

Here is an example:

NODE_NAME1,NODE_NAME2
INT64,INT64
1,2
1,3
2,2
1,2

Let's say you have this file at ~/opcuadata/mockdata.csv. Here is how you start the server with it:

docker run --name opcua_mockserver --init --rm \
    -v ~/opcuadata:/app/data \
    -p 4840:4840 \
    intersystemsdc/opcua-mockserver:version-0.3.0

Without any particular specification, the server will iterate through the lines of the input file at the constant rate of about 1 row per second. However, it is also possible to be more specific as to how long the server is to allow each data row to remain available to queries from OPC UA clients. In order to do so, an additional column can be specified and given the "data type" of "DURATION". (The name of the column is irrelevant.) The values in such a column with thus indicate the length of time in milliseconds that the row should remain available for queries. For example, the specification below would indicate that each row should be held for an ascending number of seconds: the first for 1 second, the second for 2 seconds, etc.

NODE_NAME1,NODE_NAME2,COLNAME
INT64,INT64,DURATION
1,2,1000
1,3,2000
2,2,3000
1,2,4000