OPC UA seems to miss DataType at the nodes attributes

[anonymous]

Hi,

just played around with the OPC UA Server in OpenModelica and tried to connect with different clients (UA Expert, Beckhoff TwinCat PLC OPC IO, Android Suppanel) to a simple model (Just a sine source, a resistor and ground). Connection to the OPC-UA server works fine and in UA Expert I can set values and watch variables changing.

But there seems to be something broken between version 1.12 and 1.13+. The OPC clients can't reliably determine the datatype for the attributes presented by the OPC-UA server. UA Expert may work around that somehow, but the other clients I tested, reject using the variables - due to the missing variable information?

Please see the following screenshots:

OpenModelica v1.12.0

OpenModelica v1.13 to v1.15-dev

[casella]

@sjoelund.se, any chance to fix this in 1.14.1?

Thanks!

[adrpo]

I already tagged 1.14.1, but we can make a 1.14.2.

[casella]

No problem :)

[Michael G. <michael@…>]

Replying to casella:

@sjoelund.se, any chance to fix this in 1.14.1?

Thanks!

Thanks for taking care. Would love to test a hotfix as soon as it is available... As nightly?

[casella]

Of course we could first get this into the latest 1.16.0-dev nightly, then cherry-pick it for 1.14.2 (1.14.1 has already been tagged)

[Michael G. <michael@…>]

Replying to casella:

Of course we could first get this into the latest 1.16.0-dev nightly, then cherry-pick it for 1.14.2 (1.14.1 has already been tagged)

If this is possible, I would appreciate. Just let me know when it's ready so I load it and test it with Beckhoff TwinCat...

[casella]

@sjoelund.se, any chance to fix this for 1.16.0?

[casella]

Retargeted to 1.17.0 after 1.16.0 release

[casella]

Retargeted to 1.18.0 because of 1.17.0 timed release.

[casella]

Ticket retargeted after milestone closed