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 Repliesim 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 RepliesI 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 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]...
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.
View 7 Replieshow 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 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]....
We 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 RepliesI'm writing some VB2008 code to control four 7-seg LEDs I bought from Velleman. They came with some example code in VB 5.0, and with instructions telling me to input 5 bytes at a time in the format Chr$() & Chr$() & etc. for the rest of the 5 bytes. When I try to do this using VB2008, it rejects the $ sign, so I've tried it using the Chr() format, which VB2008 allows. However, it doesn't work. Is Chr() the new version of Chr$() or are they different entities? In sending data to the LEDs, I'm using LiveComPort.WriteLine() as my command. (My serial port is called LiveComPort) I also tried it with LiveComPort.Write() asthe command. I know that my serial port and the LEDs are working, because they respond to the demo program provided by Velleman.
View 7 RepliesDo someone know if there is a\\ USB control for the USB port communication? like the SerialPort control for the COM port.
View 2 RepliesAll these days i used to program in Vb6.0. Now since from last 15 days I have been using Vb2008. In Vb6.0 I used MSCOMM for serial communications. Here in Vb2008 I found Serial port control equivalent to it. I somehow managed to learn how to send data using serial port control and set parameters like baudrate , stopbits , etc. But I' not getting how to get the received data. In VB 6.0 we used to use comEvReceive in OnComm event and used MSCOM1.Input to get the received data. But I'm not getting how to do the same in vb2008.
View 2 RepliesI have created a laser that can be controlled via the serial port. I've written the code to switch it on/off and it works fine. How do i make it strobe? Here's the code to switch it on, to switch it off is similar (don't ask why it is like this...i think it's the transistor from the circuit board that switches the signal):
[Code]...
I 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 RepliesHow to control LCD 2X16 or 4X20 by the LPT port?
I have these two LCDs, I wired them and connected them to the LPT port and used free programs from the net. they work fine. I would like to learn how to do that in VB.NET. Maby program a form to show time and date and display the contenant of TextBox.
I have a simple USB fan that just runs on the power from the USB port. I want to be able to turn of and on the fan from a simple application.
View 1 Repliesi trying to make a control for serial port to send a string "1" to serial port , but i don't want to use a form. I want to be able to save as .ost file or be able to input it into outlook 2003 macro to use as a script. can someone get me started on how to name, open, set, write to a serial port without using a form? just to use as a macro?
View 2 Repliesi want to control pc parallel port using vb.net/vb6 , i need timer coding .
View 1 RepliesI have written a programm with visual basic 2008 express edition and I'd like to use the parallel port to communicate with my self-made circuit. I want to controll 120 LEDs with the parallel port but I don't get it how. I know how to activate the databus but not how to activate the control lines of the parallel port.
View 3 RepliesI just need to write data to serial port to control a toy car
Moving left, right, forward, back.
Can someone tell me if the functionallity to control a parallel port in MS VB 2010 Expess exists? I was expecting to have to add a reference such as the microsoft comm control 6.0. However this reference does not appear in the list. Everything I search for references .net 2005/2008.
View 4 RepliesI am trying to send a control string from VB.NET to a serial port. I am using a pololu trex jr. on the receiving end of the serial port. I have attached a copy of my current code which compiles without errors, but fails to send data. I can tell that it is not sending data because I have a light on the control board connected to the port and it normally blinks when data is received. The program that came with the board drives it perfectly but does not serve the purpose I need it to. I am open to any suggestions as I eventually plan to write a class to contain the control routines.
View 12 RepliesIn my windows application I am using Mscomm32.ocx control for serial communication.
I set the control properties like below in the Form1_Load event.
AxMSComm1.CommPort = 1
AxMSComm1.Settings = "9600,N,8,1"
AxMSComm1.InputLen = 0
[Code]....
I'm working on a project where I need to trigger an event when a switch is closed. It is my understanding that it is possible to use the control lines on a serial port and read whether the switch is closed or not. I've found a schematic of how to connect the switches to the pins, but I have not been able to find any example code on how you can read the state of the switches.
View 2 RepliesI am getting scale values from a comm port into a richtextbox control, now as long as the connections and the scale is working great scale readings continuously flow into the control all the time, however when the connections or the scale is turned of the label that displays the weight will give a message saying error.
After 5 seconds I want to be able to give the operator the choice to take scale readings manually. This is my code so far.
Private Sub tmScaleTimer_Tick(sender As System.Object, e As System.EventArgs) Handles tmScaleTimer.Tick
If rtbDisplay.Text.Length = i Then
[Code].....
how do I restart the timer if the interval has elapsed
In my application I am using MSComm32.ocx control for the purpose of serial port communication.
when i am using it I am getting a following error while writing data to the port.
"AxMSComm1.Output {"Exception from HRESULT: 0x800A018A (CTL_E_GETNOTSUPPORTED)"} Object "
I am writing the output to the port like below. AxMSComm1.Output ="Hello"
I mention the properties of the ocx control in the form load like below. AxMSComm1.CommPort = 1
AxMSComm1.Settings ="9600,N,8,1"
AxMSComm1.InputLen = 0
AxMSComm1.PortOpen =True
I searched for this error in the net.But I am not found any information for this issue.
can anybody explain why I am getting that error and how to resolve it???
here is my code
Public
Class
Form1
[code].....
I'm mohammed from Oman ,I'm visual studio.net programmer How I can Read the Data From Barcode Weight scales By Serial port and TcpIp port
View 7 RepliesI have a Windows form.in windows form have a combo box that give me a list of available port serial with it code (Dim ports As String() =SerialPort.GetPortNames())for example( Com1,Com8,Com15,...).but I want to give me fullname of serial port in device manager for example in dvice manager is these (Comunication Port(COM1) - Printer Port(LPT1) And USB Serial Port(COM8)).how to Get it?
View 2 RepliesI would like to detect the Address and Port number of the Parallel Port in computer.
View 4 Replies