How to program to write a value to OPCUA node

General Discussion
1

I have read the example of OPCUA----Ignition-ModuleSDK-7.2.8\example\WeatherModule_Gateway,the example show how to build nodes,and get node value from others sourse(In this example :Weather service from a web service),so it can read the node value,but how can I write a value to a node ,in other words: change the node’s value,and in response to change the value from others sourse,thank you very much.

2

The way the weather driver works is that there’s a lot of machinery going on in the background as a result of extending from NodeMapDriver that leads to values being asked of DataNode - not the other way around.

But for any driver what ultimately happens when a subscription is made is that you get a SubscriptionItem for each address. SubscriptionItem extends ReadItem, which has a setValue(DataValue) call on it. This call is how the driver communicates value changes back to the server.

These interfaces (SubscriptionItem, ReadItem) are documented in the javadocs as well.

3

Thank your very much.
Can you give me more detailed inforamtion about it,A framework of code about how to read and write a value to a node will be appreciated.