Writing variables to ABB IRC5 controller using set_value() function

[Engeenur]

I am having problems with using the node.set_value() function. I keep getting a "The value supplied for the attribute is not of the same type as the attribute"s value."(BadTypeMismatch) error. I can change the variable value with the Softing OPC UA Client software.

I tried all sorts of things:
dv = 1.0
self.start_flag_node.set_value(dv)

dv = opcua.ua.DataValue(opcua.ua.Variant(3.0, opcua.ua.VariantType.Double))
dv.ServerTimestamp = None
dv.SourceTimestamp = None
self.start_flag_node.set_value(dv)

dv = opcua.ua.Variant(3.0, opcua.ua.VariantType.Double)
self.start_flag_node.set_value(dv)

and probably some others.

No matter what I do I still get the same error. The DataType of variable that the Softing OPC UA Client detects this node to have is a Double (i=11).

[schroeder-]

Are you using asyncua or python opcua? Because from the module names it looks you are using the old library.

If you are using python opcua try first to switch to asyncua with either async oder use the syncwrapper.

[schroeder-]

Also this is the easiest solution works only asyncua:

dv = 1.0
self.start_flag_node.set_value(ua.Double(dv))

[Engeenur]

@schroeder- thank you. I am still using the old library. Do you know if i have to make a new certificate for my python client if i'm going to use the new one?

[schroeder-]

The certificate can be the same, on both libraries.