I am controlling a relay board via a COM port, no problems. I need to connect to an IP connection, and read data from the server, after sending a username and password. Depending on the data, will depend on what relay I am going to switch.Now I have no idea where to start, I have a document that explains how I need to connect to the IP interface, and what data to expect.
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currently doing a college project called Home Appliances System by using Voice Command.I have done the voice command part and now it comes to the interfacing between PC and relay board part. Currently I'm considering using USB port to send data(to trigger the home application). Does anyone know how to do it with VB.net?
View 9 RepliesIs there any code I can use in controlling a relay through a usb port using vb.net. I have to control some cylinders. So i have to use the relays and control them. For that I need to communicate through USB.
View 6 Repliesi wrote some code to control an ip device, i made in windows forms application , silverlight and asp.net, they all work on the local network , but won't work from internet web server, i have the router forwarding to local device ip and port,
i get this error:
A connection attempt failed because the connected party did not properly respond after a period of time, or established connection failed because connected host has failed to respond 226.45.306.158:4999
here's the code used
Private Function SendRelayCommandTest(ByVal e As String) As String
'SendTextToIP("setstate,1:" & thePort & "," & TheState)
'Dim IPHostCC1 As String = "192.168.1.105"
[Code]....
im new around here and also to VB.NET infact any aspect of programming, im hoping to be able to some useful stuff but at the momment im a little stuck i only have basic knoweldge so anyway here goes im programming in VB.NET 2008 Express edition, im also using inpout32.dll which is running ok and also controlling the parallel port fine.the problem i have is as follows the program so far is controlling the 8 outputs at the momment, i can turn each individual one on but when i try to turn multiple outputs on it will only turn on one and the other that was turned on goes off i understand its controlled in a 255 bit array but how to decode it is a little tough
View 5 RepliesWe are trying to modify a program to control a usb relay device. Essentially what the program originally does is give you a series of check boxes that you check to make the relay fire. We tried to modify the code so that the box is checked after 5 seconds using a counter and an if statement. It works, but only partially, what happens is the check box shows a check, but the even that is normally triggered does not happen. [code]
View 4 Repliesis it possible to create application for my mobile phone Sony Ericsson to remote control my program using Bluetooth connection which have simple functions?I have came across one program that is able to do that which is floAt's Mobile Agent. It can control from media player, powerpoint slides and even mouse cursor movement.
View 10 RepliesI am using SMTP Mail.. I am getting this issue"550 5.7.1 Unable to relay for user.domai.com"I have added the server name in the Relay of the IIS This also not done the trick?
View 4 RepliesI have a simple scraper. It works on some websites, but on some there is this Error:
Quote:
IOException was unhandled Unable to read data from the transport connection: The connection was closed
It is occuring at "Dim htmlresults As String = Urlcontents.ReadToEnd()".
'Create the HttpWebRequest object
Dim req As HttpWebRequest = WebRequest.Create(URL)
'Set the timeout to 1 second (or 1,000 milliseconds)
req.Timeout = 10000
[code]....
how to capture an on/off signal from a relay and count the seconds of elapsed time between the cycles on a com port? Also, which pins on the com port should be used for this?
View 12 RepliesI am trying to connect sql server 2008 in visual express 2008. at connection() line i am getting error. name connection not declared. anyone can one tell me what may be the reason for that error.
my
#Region "Statments"
Imports System
Imports System.Collections.Generic
[Code]....
how to start and control a pppoe connection using code and not using rasdial. Oh and i would also like to be able to specify the phonebook that i would like to use with full path.
View 2 RepliesIs there a (simple) way to connect a textbox, label etc. to a property in a class?I have a project with a complex series of dialogs to enter data into a list of a costum class describing an experiment with many parameters that are stored as properties (both simple variables such as strings and integers, but also more complex ones).I need both to be able to update the list of my experiment class, but also to go the other way to populate the dialogs from the class.It can of course be done outside the class and the dialogs in separate subroutines. This however, quicly becomes unmanagable and hard to maintain as the dialogs and experiment class is expanded with new elements.If there was a simple way to connect say a textbox or label in a dialog with the appropriate property holding the information it would make it much easier.
View 5 RepliesQuestion for all of the more experienced programmers out there. I am working on a program with a tab control. One tab will hold a webbrowser control within it. What I am trying to accomplish to have it pull a specific url from my website to the webbrowser control if the person is connected to the internet, BUT if they don't have a internet connection at the time, I would like to display a local html file instead
View 4 RepliesI am trying to send a simple email
Dim email As New MailMessage, Now.ToShortDateString, "Time Report")
Dim emailClient As New SmtpClient(
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I am trying to get my 4 port USB relay board to work in VB.net using the COM PORT. I found some code from a poster who has the 16 port USB relay version. When trying his code i can only get it to turn on relays 1-3 all at the same time. The product can be found here: USB 4 port relay
"01+//" - Relay 1 is switched ON
"01-//" - Relay 1 is switched OFF
"02+//" - Relay 2 is switched ON
"02-//" - Relay 2 is switched OFF
[code].....
So i am confused as to how to separate each relay out with that code above and just be able to turn on any number 1-4 relay on or off independently from each other!
I'm using interface with relay and interface is connected to computer on COM (serial) 9 pins port. In Visual Studio 2005 I'm using this
SerialPort1.Open
SerialPort1.DtrEnable = True
SerialPort1.Breakstate = True
[code].....
I am trying to get my 4 port USB relay board to work in VB.net using the COM PORT. I found some code from a poster who has the 16 port USB relay version. When trying his code i can only get it to turn on relays 1-3 all at the same time. The product can be found here: USB 4 port relay I was following what the guy in the post was doing to turn his on:
[Code]...
How do I assign a My.Settings.Item connection string to cmd.Connection connection string value?
Dim cmd As New SqlCommand()
cmd.Connection = My.Settings.Item("csStaffHoursWorked")
cmd.CommandType = CommandType.StoredProcedure
cmd.CommandText = "spSaveDeltekImport"
i am doing project in vb.net 2008 using sql server 2008. how ever suddenly changes that i made in my sql server database ate not getting reflected in my project database ..
View 3 Replieshow come the
[code...]
if you can't understand, my english is bad.. and i have a failed grade for that.can anyone help me, to provide me a sample sql connection for vs2008, im not familliar w/it because i only use vb.. and i always use access for my database
View 1 RepliesI have this piece of code which I cant seem to get working properly. I am trying to create 2 programs (a client, and a server). This is working so far with establishing connection over LAN, but for some reason when I try to connect to my friend who's on another network, it doesnt work. I happen to believe this is because he has an internal IP which is 192.168.x.x and an external IP which is pretty much any number :P But erh... How can I make my program to first connect to the external and then continue to the internal IP? :s Since I cant really write his internal IP only, cause it'd think Im trying to connect to a computer on my network. And I cant write only his external IP either, since that would only connect to the router... And I don't see an option in the following code that allows me to write both an external and internal IP :s
Anyways, here's the code (Ive left out everything, I am pretty confident, that doesn't have anything to do with it ):
Client:
CODE:
Once again, works over Local Area Network (LAN xD), but not over the internet (My computer -> My router -> ISP (Not sure if there's anything in between here xD) -> Friends ISP -> Friends router -> Friends computer)
Is there a way to display the connection properties dialog for connection string browsing(for database) in run time?
As I want the user to be able to connect to various database using the GUI.
i have an application. which is executed after every 5 mins. i have an open connection but it gives me the following error:
ExecuteScalar requires an open and available Connection. The connection's current state is closed.
my code is something like this. I have shown where all i am using ExceuteScalar()
Sub Main()
Try
connection.open()
cmd.ExecuteScalar()
[code]....
After running the following sub (VS debugger), I try to detach the database in SSMS, but it shows the connection open still and won't let me detach. If I close program in debugger, the database shows no connections. I check the dataadapter's connection in the finally block and is shows closed. What gives
Private Function ClientMasterDBFiles(ByVal MasterClientDBConnection As String, ByVal DBName As String) As DataTable
[Code]...
I am attempting to write a program that will disable the Local Area Connection while leaving the Wireless connection enabled. My company is using net-books in our stores to demo air-cards and we need to keep them off of the LAN. I'm new to VB and VB.net, and it's been a while since I did any type of programming. I've gathered some code that others have posted in forums and tutorials and I'm working through a tutorial book, but I finally believe that I am stuck.
[Code]...
i make a class and when i call on form then that error occurs "ExecuteNonQuery requires an open and available connection, the connection Current stat is close "
Class Code isImports System.Data.SqlClientImports System.DataImports System.StringPublic Class DatabaseKits Dim Cn As New SqlClient.SqlConnection Public Function BuildConnection() As Boolean Try Cn.ConnectionString = "Persist Security Info=False;Integrated Security=True;Trusted_Connection=Yes;database=BizAimsPro2008;server=Server-2k3s" BuildConnection =
[code]....
I am connecting to a data stream that pushes data continuously and when I tried to set up a network stream I just could not connect and kept getting the 'not found' error. I used the httpwebrequest with webrequest.keepalive = true and started to consume the data by reading into a buffer and then appending to a stringbuilder. Once the stringbuilder reaches max size I flush it to a text file. The problem is that I get disconnected from the data stream because I am not reading the data fast enough. I need to keep the connection open and read the data while ensuring data gets stored in text files. If I use method "CONNECT" it does not connect to the stream.
While (True)
webrequest = DirectCast(Net.WebRequest.Create(url), HttpWebRequest)
webrequest.Credentials = New System.Net.NetworkCredential(username, password)
webrequest.Method = "GET"
[code]....
should I increase the buffer size and if so what is the max? that would mean I can read more data at a time and keep up with incoming push. Disparate here.
ACtually also I noticed that it gets stuck on this line
numbytesread = responseStream.Read(bufferread, 0, BUFFER_SIZE)
and then eventually I get disconnected.
I am connecting to a data stream that pushes data continuously and when I tried to set up a network stream I just could not connect and kept getting the 'not found' error. I used the httpwebrequest with webrequest.keepalive = true and started to consume the data by reading into a buffer and then appending to a stringbuilder. Once the stringbuilder reaches max size I flush it to a text file. The problem is that I get disconnected from the data stream because I am not reading the data fast enough. I need to keep the connection open and read the data while ensuring data gets stored in text files.If I use method "CONNECT" it does not connect to the stream.[code]
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