0


I'm new to both Unity3D and OPC UA. My task is to write a simple Android app by Unity, which can connect to an available OPC UA Server.
Actually I found some source on the Internet, e.g: Create a very simple OPC client in Unity3d with opc ua .net library
The problem is, I don't really understand how the project work. I mean, for example, I create a connect Button and a text which indicate variable value. Then where to add the code? I tried some ways but it didn't work probably.
So can you give me some instruction? Thank you so much!
P/S: Here is my project: https://drive.google.com/file/d/1aQUoCXd6INWb7NcsOAR6h0lRWbhiPiog/view?usp=sharing
The OPC UA Code doesn't work (compile error but it have successfully built). Please take a look and let me know if you find my fault. Thank you

mononaro
  • 13
  • 5
  • IMHO you should start at the beginning. How to create a unity application. How does OPC UA works. Step-by-step. You will realize that this is a learning curve. Walk before you run. You can't build a house in a day. – Jeroen van Langen May 12 '20 at 11:24
  • hi @JeroenvanLangen, I have editted my question, please review and give me some advice if possible. Thank you for replying to me. – mononaro May 13 '20 at 13:43

2 Answers2

0

It could work for me with Android apk and also the windows platform. You can contact me if you still have some problems with it.

ZHICHENG HU
  • 1
  • 1
    Your answer could be improved with additional supporting information. Please [edit] to add further details, such as citations or documentation, so that others can confirm that your answer is correct. You can find more information on how to write good answers [in the help center](/help/how-to-answer). – Community Sep 22 '21 at 19:06
-1

First of all, Unity has a lot of documentation ready for you to get information out of, the documentation for a UI button can be found here: https://docs.unity3d.com/Packages/com.unity.ugui@1.0/manual/script-Button.html

In that documentation you can see the OnClick event that triggers a UnityEvent.

A simple way to get your case working can be done simply by doing the following:

Create an empty gameobject

Assign a class (script) that you made to this gameobject

Add a public method that does your connecting, or just do a print for now so you can see what happens, Unity has a print(string) method :)

To make sure it is working, you can also put a print in the start method (called at the start of a scene).

You can then click on + of the OnClick method, seen in this

image of the documentation.

Select the gameobject with the script, select the script and then the method you created. Run and press the button.

Jan Julius
  • 1
  • 1
  • Hi Jan Julius. First of all, thank you for replying to me. I'm sorry for not being clear, but my problem is writing and adding C# code (about OPC UA), not the button click event. I mean, I copied code in the link above, add it to C# script named "TestOPC.cs", then add the script to my GameObject. When I click Play, the code is supposed to intiallize OPC UA connection between my Unity app and OPC UA Server. However, there's alway a message like "all compiler errors have to be fixed before you can enter playmode", but I cannot find out that error(notthing in Console,my code is sucessfully built) – mononaro May 13 '20 at 12:13
  • If you are able to instruct me sth about OPC UA in Unity, please let me know so that I could send you my project for more details. Thank you so much – mononaro May 13 '20 at 12:14