Hello,
I need a way to connect to an opc us server from wappler. I am looking for someone to build me an extension and easy to use ui that connects to an opc ua server. I would need to know how much time and money it would cost. Here is a link to opc ua sdk that might help make the job easier
Please feel free to contact me at if you have any questions at
mmanimator12adgmaildotcom
@sw11
I can use it. how do I get it installed in wappler?
@sw11
do I need credentials?
That’s a private Git repository, needs credentials to download - just pointing out in case you’re not aware 
Hi sw11,
If all went good with this extension, would it be free for commercial use?
This Git repository is private, no one can download it (except you)
Download on Git-Hub
@sw11
I copied the files following instructions in the readme file but I don’t see it in wappler. to explain,
i have a test project in my desktop so I copied your extension folder in my project folder and then did npm i node-opcua node-opcua-client async . I see it installing in the terminal but not showing in wappler after restarting the program.
do you have a screenshot of an app structure?
In your package.json you See the 3 package ?
Screencast HowTo install the extension
@sw11
Thank you very much for showing how to add the extension!
I got couple questions though
1- Were you able to connect to an opc ua server successfully? could you please share a Screencast of how to connect to an opc ua server?
2- If so, what did you used for the endpointurl? the path to the opc ua server or the full path to the tag/datapoint inside the opc ua server?
I tried connecting to an opc ua server which is very simple but I can’t get it to work. I am wondering what I am doing wrong.
@sw11
I did install it, but the data point that I am bringing in is showing as [object Object] on the front-end page.
Please see the attached files.
You have to press F12 and then you will see the content of the object. You should already have some experience/knowledge about objects etc.
Ok, I thing I got it now. I had to add .value to the end of binding.
So, instead of {{serverconnectName.data.OPCClientName.}} I did {{serverconnectName.data.OPCClientName.value}} and it’s working good as far as one datapoint. Please forgive my knowledge, but if I want to get multiple datapoints using one opc ua reader/write, can I just use the identifier # for the main folder? would that brows to all the subfolders and datapoints under that? if yes, what would the path look like in the html code?
for example, if I have two datapoints under root/favorite/ folder what would be the path to those 2 datapoints?
and If I enable security on the opc ua server, would your OPC-UA extension work?
Thanks a lot in advanced.
Ashur…
Hi,
Can you please show me what was nodeid in opcua client reader action? or the {{htnl binding path}} like {{serverconnect1.data.test.etc…}}
I don’t know how to brows everything under folder from one client reader action ! I can only connect to the last datapoint in folder where it has a value to it.
best regards,
Ashur…
