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While there are plenty of Delphi OPC-DA Client components (commercial and open source), I can't seem to find Delphi component for OPC UA. In the absence of a Delphi OPC UA solution, should I look into using an OPC-DA to UA gateway?
EDIT
Native Delphi will be preferred, if not a DLL. I'm only looking at basic data access of OPC items.
Have a look at QuickOPC: http://www.opclabs.com/products/quickopc/languages-and-tools/delphi . Disclaimer: This is a self-promotion.
You can use OPC UA Proxy from Matrikon, which allows classic OPC DA clients connect to OPC UA Servers.
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I need to send data in real time between Delphi/C++Builder apps placed in different PCs not connected in the same LAN, only using Internet.
My first approach was via DataSnap REST server but it is not practical due proxy and router problems. The configuration was too hard for the users plus that some people do not like to have a web server running in their machines opening the corresponding ports.
My second approach is using a server in the middle. I am checking SignalR technology that seems to fit very well. It is well solved for C# but I cannot find any information about VCL, Delphi or C++ Builder.
Is there some library or do I need to work from scratch via WebSockets?
Is there another way to communicate VCL applications that run in separated PCs only connected to Internet?
/n Software has a WebSockets library - with C++Builder support.
https://www.nsoftware.com/ipworks/ws/
Docs at https://cdn.nsoftware.com/help/IWF/bcb/
Download (there is a trial edition) at https://www.nsoftware.com/ipworks/ws/download.aspx
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I am going to buy Delphi Tokyo because my company has XE2 and we need a fresh update. I see that Delphi tokyo has Linux support but I have 2 questions:
1) I have seen that I can make apps for linux ubuntu server. Does Delphi allow apps for ubuntu client lts as well?
2) Can delphi produce GUI? I mean firemonkey support for linux so that I can use buttons and so on. If not is it planned?
Thanks in advance
Currently, there isn't any native support for Linux client applications - however, third party client support is available via FmxLinux.
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As mentioned on the Aquarium, the WebSocket protocol, often described as one of the key elements of HTML5, has finally been blessed (RFC 6455).
Which WebSocket server implementations are available for Delphi?
Delphi on Rails (Google Code, Mozilla Public License 1.1)
Delphi Web Socket (Google Code, based on Indy 9, New BSD License)
WebSockets Delphi Components (commercial, Indy 10, Delphi 7 to Rio)
Newer version of Indy implementation by André Mussche (the author of AsmProfiler) can be found here.
It is implemented in Delphi on Rails, it support old and new WS protocol.
http://code.google.com/p/delphionrails/
Here is 2 more projects:
bauglir-websocket - WebSocket server/client implementation in Pascal and C#;
ics-websockets - WebSockets server for Delphi based on Internet Component Suite (ICS);
Try IPworks for Delphi, they have nice quite of interoperable components (paid, not free).
https://www.nsoftware.com/ipworks/ws/#plat-delphi
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I have looked for forever on google on how to make a Delphi IRC client.
But to no Avail, and being new to the language of Pascal has not helped my endeavors. All I need is code demonstrating how to connect to an IRC server on a channel, and receive anything sent on just that channel(no private messages).
Thanks
I one wrote one: RoIRC and open sourced it, but that site apparently doesn't allow open access to its SVN to non-members, so I'll put it up on github sometimes soon. Keep an eye out here
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I have to implement a communication between my app and another PC using the industrial standard protocol SECS/GEM PV2.
Are there any libraries available that I can use with Delphi?
Google didn't give me any usable results so far, maybe someone has experience with this protocol already?
The page about High-Speed SECS Message Services lists an open source implementation:
FREESECS, an open source suite of implementations of semiconductor fab communication standards
FREESECS components are implemented in C and C++. Currently available are: HSMS (SEMI E37.1) and SECSII (SEMI E5).
Maybe these components can be used with Delphi.