I'm trying to interface my UNO with a Wonderware application. I installed the OPC server and it connects to the UNO. I added one item for testing, but can't see it. My OPC tag browser comes up empty.
And if I go to http://192.168.2.229/random I can see the actual data, so the Arduino is serving it up, but the OPC Server is not getting the individual items for some reason.
phuz:
And if I go to http://192.168.2.229/random I can see the actual data, so the Arduino is serving it up, but the OPC Server is not getting the individual items for some reason.
You are the one that needs to do the googling, and post relevant links. Do NOT expect us to do that to help you with your project, without compensation.
PaulS:
You are the one that needs to do the googling, and post relevant links. Do NOT expect us to do that to help you with your project, without compensation.
No offense, but a user with 43k posts asks "What is" twice in the same reply...obviously has no idea what either are, and therefore is of no help.
Believe me, I've done my googling, which is why I defer to the forum.
But I digress. I found the issue, and hopefully this will help someone else who stumbles on the same issue. Make sure the OPC server and the OPC library are the same version. Turns out I had v2.0 of the server (from st4makers) but 1.7 of the library. Only 1.7 is available through the IDE. I removed that and found a copy of the 2.0 library and once I started using that, the OPC items showed up. There must be a change significant enough in the library versions that prevented it from working.