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Questions tagged [open62541]

Used to tag questions related to the open62541 OPC UA stack.

79 questions
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How to see added open62541 parameters in uaexpert?

I'm posting this here because I'm convinced this is not a bug an it is just my test configuration that is not properly setup but I'm not able to put a finger on what I'm doing wrong. I install the single file…
simgineer
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basic time series(ADC) transfer arhitecture with open62541

I'm new to OPCUA protocol, and I want to make OPCUA server on device that samples continious analog signal. What is the best OPCUA arhitecture for fast continious sample transfer to client?
user2134766
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compile error with open62541 (OPC UA), lwip and freeRTOS on STM32H7

I have working system with lwip and freeRTOS on this bord. I would like to add open62541 implementation of OPC UA with single .c and .h files like described here. I was able to create open62541 .c and .h files and added these files to my working…
user2134766
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Reading UA_Arguments of a Node from open62541Client

I am interested in Reading InputArguments and OutputArgument nodes of a Method node from the client. Assuming I have 2 InputArguments and I am trying to read the first InputArgument. UA_Variant v; UA_NodeId n = UA_NODEID_NUMERIC(0,…
Indri
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open62541 Client is disconnect from OPC-UA Server

first thanks to read this question I have some problem about open62541 disconnect issue I checked that the connection is lost every same cycle. cycle time is 12min 40sec. I checked connect status from this code UA_ReadResponse response =…
JeaHwan Chung
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Generating automatic NodeIDs in our own namespace

For creating a new node from client (any type , does not matter), I used the below function. UA_NodeId new_node_id; .....some code... UA_Client_addVariableNode(m_client, UA_NODEID_NULL, …
Indri
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UAExpert does not find OPC UA server certificate

I have an OPC UA server based on open62541 that connects correctly with the client UAExpert of UnifiedAutomotion. I try to add a server certificate but the UAExpert cannot find it, even if I add it to the trust list from UAExpert>Certificate…
anvitu
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open62541 OPC UA stack server side callback on client disconnect

I'm building a server using the open62541 OPC UA stack version 1.0. This works great so far. When a client disconnects I need to do some maintenance at server side. Is there a possibility to execute a callback when a client disconnects from the OPC…
SRA
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how to transfer file from OPC UA client to OPC UA Server

I'm using open62541 to run a server on my embedded device(stm32f429), as a client I use UAExpert to connect to the server and borowse the nodes. My problem is that I want to upload a file from Client "UAExpert" to my Server. I found a similiar…
Embedded Sys
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How to build open62541 in C++ Builder 6 with or without using CMake?

I am trying to build the open62541 in C++ Builder 6. I was able to find steps for doing the same in Visual Studio. But, I want to do it in C++ Builder 6. I have followed the steps explained for building open62541 using Visual Studio in the…
inapathtolearn
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Updating/Writing a Variable to an ObjectNode

I am trying to build an OPC UA Server which monitors a REST API. The code for the Object Class is generated from an XML file as explained in the documentation from open62541. I have also tried to use the parent ID and i have also tried to browse for…
gedoensmax
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Wireshark receives UDP multicast packages, but subscribing client application does not?

Description I am currently trying to publish timestamps on the raspberry pi and subscribe to them on my windows based PC. For this, I connected BOTH the Raspberry Pi and the Windows PC to a Switch. So, if I start the publish sample on the Raspberry…
user7335295
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open62541: Error when building PubSub example

Currently, I am trying to build the PubSub example of the open62541 implementation. I have already gone through the documentation on how to build the examples a several times but I cannot figure it out. I have tried to compile the PubSub tutorial…
user7335295
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Build open62541 library as external library with CMake

I would like to include open62541 library to my existing C++ project in Visual Studio using CMake. open62541 itself uses CMake as build tool. Project structure: MyOPC │ CMakeLists.txt │ MyOPC.cpp │ MyOPC.h ├───.vs └───open62541 │ …
user1646245
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Can't query node from open62541 server to milo client

I have an OPC-UA server implemented with open62541. I have an OPC-UA client implemented with milo. My open62541 server works when I request its nodes it with an open62541 client. My milo client is able to request nodes from an milo server. My milo…
Motiss
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