# WDTC widget | The OpcUa viewer widget **URL:** \ **Category:** Widget Development Tool Chain\ **Tags:** wdtc-idea, wdtc-widget\ **Created:** [April 2, 2025, 11:01am UTC](https://community.br-automation.com/t/wdtc-widget-the-opcua-viewer-widget/6451 "2025-04-02T11:01:34Z")\ **Posts on this page:** 8\ **Page:** 2
**Author:** ![Christian\_Schulte](https://dub1.discourse-cdn.com/brcommunity/user_avatar/community.br-automation.com/christian_schulte/32/1282_2.png) [@Christian\_Schulte](https://community.br-automation.com/u/Christian_Schulte)\ **Post date:** [October 7, 2025, 10:20am UTC](https://community.br-automation.com/t/wdtc-widget-the-opcua-viewer-widget/6451/21 "2025-10-07T10:20:28Z")
Hi Florent, thank you for your prompt reply. I will inquire with local support to see if there is any way to change the alias during runtime. The widget is exactly what I need to see where I can store my data on the customer side, but unfortunately, the fixed alias makes it unusable for me. Regards Christian ---
**Author:** ![hobi72](https://dub1.discourse-cdn.com/brcommunity/user_avatar/community.br-automation.com/hobi72/32/68_2.png) [@hobi72](https://community.br-automation.com/u/hobi72)\ **Post date:** [October 7, 2025, 2:16pm UTC](https://community.br-automation.com/t/wdtc-widget-the-opcua-viewer-widget/6451/22 "2025-10-07T14:16:18Z")
Hi, the widget uses the internal mechanisms of mapp View. As mapp View does not need / support dynamic OPC-UA servers, there is also no way to adjust the configuration at runtime. If you need this additional flexibility, you would need to look into “mapp Connect” - mapp Connect is an additional interface, not directly connected to mapp View / Widgets, which gives you access to a rest-based API, which you can use to connect to any OPC-UA server directly to read/write/subscribe data. CHH ---
**Author:** ![Andi\_Sherifi](https://avatars.discourse-cdn.com/v4/letter/a/FF8800/32.png) [@Andi\_Sherifi](https://community.br-automation.com/u/Andi_Sherifi)\ **Post date:** [May 12, 2026, 2:00pm UTC](https://community.br-automation.com/t/wdtc-widget-the-opcua-viewer-widget/6451/23 "2026-05-12T14:00:33Z")
Hi Florent, great work building this widget. Is it possible to interact with the OPC variables and trigger them, or at this stage can we only browse the OPC variable directory? ---
**Author:** ![florent.boissadier](https://avatars.discourse-cdn.com/v4/letter/f/FF8800/32.png) [@florent.boissadier](https://community.br-automation.com/u/florent.boissadier)\ **Post date:** [May 12, 2026, 3:25pm UTC](https://community.br-automation.com/t/wdtc-widget-the-opcua-viewer-widget/6451/24 "2026-05-12T15:25:16Z")
Hi @Andi_Sherifi Currently this widget is read-only, I build it to browse and read variables values or informations like NodeId on OpcUa servers. I could take a look at writing variables and also executing methods. If you want this feature could you please create an issue on the github repo? Regards, Florent ---
**Author:** ![florent.boissadier](https://avatars.discourse-cdn.com/v4/letter/f/FF8800/32.png) [@florent.boissadier](https://community.br-automation.com/u/florent.boissadier)\ **Post date:** [May 18, 2026, 7:04am UTC](https://community.br-automation.com/t/wdtc-widget-the-opcua-viewer-widget/6451/25 "2026-05-18T07:04:02Z")
Hi @Andi_Sherifi After taking a look at what is available with WDTC, there is no way to write an OpcUa variable. But there is a way to call OpcUa method, so I think I’ll implement the OpcUa method call. Regards, Florent ---
**Author:** ![kovarj](https://dub1.discourse-cdn.com/brcommunity/user_avatar/community.br-automation.com/kovarj/32/537_2.png) [@kovarj](https://community.br-automation.com/u/kovarj)\ **Post date:** [September 9, 2026, 8:31am UTC](https://community.br-automation.com/t/wdtc-widget-the-opcua-viewer-widget/6451/26 "2026-09-09T08:31:31Z")
17 posts were split to a new topic: [The OPC UA widget | How to browse structure variables in the OPC UA widget](https://community.br-automation.com/t/the-opc-ua-widget-how-to-browse-structure-variables-in-the-opc-ua-widget/12576) ---
**Author:** ![Andi\_Sherifi](https://avatars.discourse-cdn.com/v4/letter/a/FF8800/32.png) [@Andi\_Sherifi](https://community.br-automation.com/u/Andi_Sherifi)\ **Post date:** [September 15, 2026, 9:20pm UTC](https://community.br-automation.com/t/wdtc-widget-the-opcua-viewer-widget/6451/27 "2026-09-15T21:20:48Z")
Hi Florent, Just looking back through this. Were you able to implement the OpcUa method call for this Widget? ---
**Author:** ![florent.boissadier](https://avatars.discourse-cdn.com/v4/letter/f/FF8800/32.png) [@florent.boissadier](https://community.br-automation.com/u/florent.boissadier)\ **Post date:** [September 16, 2026, 7:31am UTC](https://community.br-automation.com/t/wdtc-widget-the-opcua-viewer-widget/6451/28 "2026-09-16T07:31:33Z")
Hi Andy, I’ve take a look but I need to think about how I implement it to be user friendly for input and output arguments. I’ll let you know when it’s impletemented! Regards, Florent [Previous page](https://community.br-automation.com/t/wdtc-widget-the-opcua-viewer-widget/6451.md?page=1)