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Feature Request: OPC-UA Array support #1

Description

@nareso

Could opcua-write support OPC-UA Array data types?

Currently, scalar types such as Int32 are supported, but I would like to write an Array-type node, for example an Int32[] node:

{
"nodeId": "ns=1;s=MyInt32Array",
"dataType": "Int32[]",
"value": [1, 2, 3, 4, 5]
}

I understand that Batch Write supports writing multiple nodes, but it cannot replace writing an array value to a single OPC-UA node.

My immediate requirement is Int32[], although support for other common OPC-UA array types such as Float[], Double[], UInt32[], etc. would also be useful.

Would you consider adding Array data type support to opcua-write?

Thanks for the great Node-RED OPC-UA package!

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