Read group or multiple variables

[h1n0t0r1]

How to read group of variables or multiple variables at once ? In OPC DA we have groups.

[AndreasHeine]

Every OPC UA Variable can be an array! Its the most efficient way to read large amounts of data. you could combine custom data types with arrays.

[AndreasHeine]

from opcua import ua, uamethod, Server

server = Server() server.set_endpoint("opc.tcp://127.0.0.1:4840") server.set_server_name("test") address_space = server.register_namespace("asdf") server.set_application_uri("urn:test")

root_node = server.get_root_node() object_node = server.get_objects_node() server_node = server.get_server_node()

parameter_obj = object_node.add_object(address_space, "Parameter")

array = [0,0,0,0]

test_node = parameter_obj.add_variable(address_space, "test", ua.Variant(array, ua.VariantType.UInt64))

server.start()

[Brandon-lz]

you can use client.get_values([node1,node2,...]) and this will return a list of values