Unable to write arrays (v3)

[mm-dlwe]

I'm submitting a ...

Problem

• (x) bug report (might be related to #51, it does not work in v3 even if it seems like it should have been fixed)

Information

Current behaviour

Writing an array produces an invalid message where only a value of 0 is send instead of the array. For this reason the OPC server responds with an error.

Response from the OPC server:

• description: "The value supplied for the attribute is not of the same type as the attribute's value."

• name: "BadTypeMismatch"

  Reason for this behaviour is the following code sequence:

  1. opcua-iiot-write.js: node.on('input', ...) is called
  2. opcua-iiot-write.js: node.bianco.iiot.writeToSession is called to initiate the write request.
  3. opcua-iiot-write.js: coreClient.core.buildNodesToWrite is called to create the request
  4. core/opcua-iiot-core.js: de.biancoroyal.opcua.iiot.core.buildNodesToWrite tries to create a request for each listed node and calls de.biancoroyal.opcua.iiot.core.buildNewVariant
  5. core/opcua-iiot-core.js: de.biancoroyal.opcua.iiot.core.buildNewVariant tries to convert the value type and does not respect arrayType, it tries to parse the array as integer with results in a value of zero instead of an array
  6. The message is send to the OPC-UA Server which responds with a BadTypeMismatch failure because it expects an array and not a value.

  Expected behaviour Instead of a single value the whole array should be passed to the node-opcua library and the OPC server. The write operation should then suceed.

  Minimal reproduction of the problem with instructions

  1. Setup a flow and try to write an array (see the attached demo flow)

  Minimal Demo Flow flows.txt

Your Environment

Please tell us about your environment:

• (x) I am using just the Node-RED package and got node-opcua installed with it
• Device :
  • (x) Windows: 10
• Description of the connecting OPC UA system:
  • Name : UaCPPServer
  • Version: 1.5.6
  • Vendor : Unified Automation
  • Link : https://www.unified-automation.com/downloads/opc-ua-servers.html

• Node-RED version: 0.20.5
• node-red-contrib-iiot-opcua version: 3.10.2 (a0c60da)
• Node: (min. 8.x) node --version = v8.11.3

[biancode]

The full array handling is not implemented for now.

[mm-dlwe]

I have added a possible solution in PR #109.

[biancode]

feat since prerelease 3.11.1-4 - Matrix and Array is working well on testing

[biancode]

released with 3.11.1