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Build an OPC HDA client & server in VB.NET

$250-750 USD

In Progress
Posted about 7 years ago

$250-750 USD

Paid on delivery
Please read everything before responding. • Build vb.net DLLs which can function as an OPC (OLE for Process Control) HDA client & server each (the DCOM version). Support full functionality of OPC-HDA. The OPC-HDA Server will work against a MS SQL Server database. The DB schema will be provided. Deliver OPC HDA client first. • A test application that will work with some Historian that supports OPC-HDA. Allow us to test the finished solution with it also. Must specify the Historian intended to be used. • The DLLs must not just be the examples downloaded off the some web site which don’t have the source code. • Need full vb.net source code for the internal part of the server & client. We need this source code in case we have errors or need to do optimization later. • It can have dependencies on PUBLIC and FREELY, UNENCUMBERED AVAILABLE libraries if necessary. • Works with latest .NET framework & Builds in latest MS Visual Studio. More info on OPC may be obtained from OPC Foundation website. You have to provide training to us for at least 8 hours to explain the coding topology-structure made in the project & also help encapsulate it into our code project successfully. The budget is flexible. Complete source code with detailed documentation for this project, need to be submitted on daily basis. The code & all deliverable will become our property. Please specify your team's hours (in GMT) when they will be readily available via phone etc. We expect a week time of delivery from you after the award or specify the time. Provide us with rough milestones (if any) tied to payments. no upfront. Delays will cause problems for our project. DO NOT PROVIDE ANY IRRELEVANT INFO IN YOUR RESPONSE. Provide enough relevant info in your response so we do not have to ask any questions. Only serious contenders need to apply & we shall assume you have understood & accept all conditions, unless specified otherwise. Your response will need to be a binding for 20 days after bidding. Also explain why should we hire you against others.
Project ID: 12953444

About the project

9 proposals
Remote project
Active 7 yrs ago

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Dear employer, My name is Leonid, I am experienced .NET developer and am interested in bidding on your project. I have a lot of experience working with OPC DA/HDA/AE interfaces since version OPC 2.0, including support of OPC Xi - based custom class library for .NET when I've been working as an Emerson Process Management employee. I'd like to clarify some of your key requirements to better understand the scope of your project. 1) Do you need the source code to be written using VB .NET and not using C#? I have a lot of existing OPC-related code written in C#. It is possible to translate it into VB .NET of course, but it would require additional efforts. 2) Do you need DLLs or EXEs for your HDA server and client (i.e. in-process or out-of-process COM modules)? 3) Am I understand correctly that HDA server should load data from MS SQL database and then expose it as HDA nodes/values? Is the structure of nodes/values fixed or dynamic? 4) Why do you need OPC HDA client delivered first? What is the purpose of having a client without a server? 5) What is "the latest version of .NET Framework and MS Visual Studio" in the context of this project? Your answers will allow me to refine my bid conditions and provide real estimation of completion date. I have a colleague of mine who can help me with this project, but I suppose that the delivery date can't be less than 10 days. I am looking forward to hearing from you soon. Best regards, Leonid.
$555 USD in 10 days
5.0 (4 reviews)
0.9
0.9
9 freelancers are bidding on average $751 USD for this job
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Hello, I am VB, VBA, C#, WPF, Java, Delphi, PHP, ASP.NET, CAD and GIS developer, I developed many desktop applications and custom tools, macros and Add-Ins. For reference see my profile. I am ready to discuss and doing the project. Best regards, Eyad
$1,578 USD in 20 days
5.0 (25 reviews)
7.0
7.0
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C, C++, VB3, VB4, VB5, VB6, VB, VB.NET 2015, ASP.NET, MVC, WPF, XML, MSSQL 2014, HTML & CSS3, AWS(Amazon Web Service) programmer. I have experience about 20 years (32,000+ hours) in programming complex database application as well as Windows Desktop and Server/Client application. *** I understood the requirements to build the components of vb.net and the OPC Client & Server specifications *** i had worked such type of protocol and have experience on PLC *** my GMT +6 *** feel free to message me on freelancer.com & see my portfolio *** you will get yearly service and support as well as update of this software to avail new version from me. I am professional to provide corporate custom complex software which is not available in the recent market. So you may turn your desired application dream to real. Long term support.
$1,500 USD in 30 days
5.0 (17 reviews)
6.0
6.0
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Hello. I have a very professional team in this field. We can help you realize your idea in shot time. Actually we have help more than 200+ customers in the past 3 years. I can help you out.
$277 USD in 10 days
0.0 (0 reviews)
0.0
0.0
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Hello! My name is Dasha, I'm Business Development Manager in the big Ukrainian company with has been working with Software and Application development for nearly 10 years. I'm pretty sure we have a lot of things to discuss considering your project. We are having 24/7 customers support. That means you can give us a call, talk to someone you trust and be sure that your issue will be resolved ASAP. Just write me back and I will contact you whenever it is convenient for you in order to discuss the possible cooperation in the nearest future.
$555 USD in 10 days
0.0 (0 reviews)
0.0
0.0

About the client

Flag of UNITED STATES
HOUSTON, United States
5.0
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Member since Aug 19, 2013

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