CODEWITHSUNDEEP
asynchronousopc-uaopen62541
Socrates
Socrates

Reputation: 395

Async read and write API on Open62541 OPC UA

I am developing an OPC UA client that needs to connect asynchronously to a server and update its node data. I am using UA_Client_connectAsync to connect to the server but the async write/read APIs e.g. UA_Client_writeValueAttribute_async in

Examples/client_async.c

of Examples codes are missing from source code and do not compile. Are they deprecated? What is the new API for Async read/write to the server?

I am asking this question because I have tried the UA_Client_writeValueAttribute API with the non-blocking UA_Client_connectAsync and the server node does not receive any data on its node.

Upvotes: 2

Views: 1062

Answers (1)

robert
robert

Reputation: 3615

There is an async client example at https://github.com/open62541/open62541/blob/master/examples/client_async.c.

The critical ingredient is to call UA_Client_run_iterate repeatedly (e.g. in a loop that is executed by a separate thread).

Upvotes: 1

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