how to ensure guaranteed delivery ?

[HaythemLtifi]

Hello guys. can any one guide me how to implement a guaranteed delivery? i want to know if the client got the values or not like a feed back loop to make sure that when the client loses connection i can just save the data somewhere until the client reconnect.
I am not a software developer but i have to do this so wish me luck
link: https://opcfoundation.org/about/opc-technologies/opc-ua/

[AndreasHeine]

OPC UA Pub/Sub is not implemented in this library!

[AndreasHeine]

https://github.com/FreeOpcUa/python-opcua/blob/master/README.md

[HaythemLtifi]

thanks for your effort guys, keep up the good work

[zerox1212]

Implementing PUB/SUB is not a trivial task.

However an alterative is to enable history on your node in the server, then have the client work from the history. As long as server is recording, it should not miss values. This might help you, but it isn't a replacement for PUB/SUB.

[HaythemLtifi]

oh that will be perfect . i have a rude question xD since i am not a developer its tricky for me to code . is here an example code that uses history that i can build on it? thanks