I know how to send data to com or virtual usb-com if it has physical com port number listed under "Ports (COM&LPT)" tab in the Windows device manager
' sending to device with physical COM port number"
Try
Dim searcher As New ManagementObjectSearcher( _
[Code]...
But how to send data to the device listed in "Universal Serial Bus Controllers" tab without any physical COM port number?
Is it possible to send information to a USB Video game controller in VB.Net? The kind of information I want to send to it is information causing the device to think that a button is pressed on the controller when it really is not. Or even better, is it possible to make a USB wire that connects to your computer and another USB port on something such a computer and send information that a video game controller would send to the other computer or whatever? Basically what I want to do is emulate a guitar hero controller sending the data of the buttons being pressed to an xbox 360 console.
View 6 RepliesIn VB6, I use CHR$(&H00) to create a Null Character. In VB.Net VS2008 CHR(&H00) creats a Null. I'm trying to send a Hex(00) to a serial device, but the VB.Net function only sends a null, not a null character. How can I accomplish this with VB.Net?
View 5 RepliesIn VB6, I use CHR$(&H00) to create a Null Character. In VB.Net VS2008 CHR(&H00) creats a Null. I'm trying to send a Hex(00) to a serial device, but the VB.Net function only sends a null, not a null character. How can I accomplish this with VB.Net?
View 1 RepliesI need to send commands from PC to device through USB cable, and the code is : "0"(48) and must end with Enter(13). so what should I type in for the code for Enter?
View 6 RepliesI am attempting to write/read data to/from a device that is connected to my laptop via a USB-to-serial connection.The device getsa picked up in my device manager on com port 8.What do I need to be able retreive and send info. across to the device?
View 18 RepliesI want to send a simple command, such as "v20" followed by a carriage control character, to a heating/cooling block connected to a desktop computer running Windows XP. I am able to get the commands to work within a terminal emulator. I want to compile a simple program that will be executed by software used to control a liquid handling robot.I've looked at the how to send strings to serial ports in visual basic page and modified that code ever so slightly to send the data that I want. However, it does not work and my heating/cooling block is not changing temperatures.
Here's what I have written:
Sub SendSerialData(ByVal data As String)
data = "n65"
' Send strings to a serial port.
[code]....
I have a need to construct a command Byte to send to another device using bit wise operations.There seem to be plenty of article on how to do this for indiviual bits using an OR'd constant but how do I do this for values that span multiple bits? eg "Bits 4-1" set the repeat count".so how to I inject a repeat count value of say 7 into my command byte?
View 1 RepliesI am currently making an application which can send recharge amount by using a mobile device. (Nokia E71).
View 3 RepliesI want to do what I have done in the past, using the old VB6. Subclassing has changed a lot since VB6 and I still want to do the same:
I need to intercept WM_PAINT of DataGridView, send it to a memory device context (to avoid flickering), make some visual changes, like place a logo over all over the grid. With VB6, was easy to do. I have spend hours trying to convert VB6/API code to Visual Basic Express 2010 code, without success.
I have a table with several rows of data that I need to return to the controller. In my view, I initially load the table by selection of a time period and clicking a button. The table loads all my relevant records but one of my table cells contains a dropdown list. So I should be able make a selection in the dropdown click "update" and my controller saves the changes.
So everything works until I try and save. The model that is sent to the controller is completely null. The list property I have tied to the table cells returns to the controller null.
[Code]...
NOTE: This is written in VB.NET but C# help is welcome. I am familiar with both languages in MVC.
I am writing my first MVC application, and struggling with how best to pass data from my controllers to my views. I have a very simple XML document structured like this. (Yes, this is Magic: The Gathering data)
<setlist>
<set>
<name>Alara Reborn</name>
<block>Shards of Alara</block>
<cards>145</cards>
[Code]...
But I get an Object Block or With Block error when trying to access SelectSingleNode("block") on the second "set" node, since that node doesn't have a "block" node.I also have a feeling that the way I'm approaching the view is all wrong. Is there a better way to get this simple XML data into the view so I can work with it?
How can I create a simple application to send timed controls to an external device?
What I need is to create a very simple application that sends control signals or voltages out to an external device connected via serial perhaps. The external device will in turn trigger some electromechanical devices. There needs to be 24 independent controls each with a simple command equivalent to on or off. What is important is being able to control the timings of the on and off on each control.[code]....
I'm currently working on a project where I am transmitting data from a comm device via the serial port and resorting the raw data (in binary) to its respective ascii values. The problem I'm facing is determining the most efficient method to accomplish my goal. Essentially, I have 68 bytes coming in, the first and second bytes represent the page and packet number and the data itself ranges from 3 to 64, the remaining for my checksum.
What I am needing to do is, grab 50 consecutive bytes per variable in my array, and that is where I'm confused. I have easily pulled my 3-64 bytes and stored that data to a string. I just don't know the most efficient method to accomplish my goal. Should I write directly to file all my data, as there are like 8 pages, of 128 packet data. [Code] I can capture the the first 50 by using a for-loop easily, but what would be the preferred method to track what data chunk I've taken? The more I think about it, I think I may just want to write to file, all my data, and then just take them back to back in 50 byte chunks. Is that the most efficient method?
I have a modbus TCP device that I have managed to connected to through my VB source code.
I want to poll (continueously read) data from certain registers of the device, and store the polled data in a file (text,csv, excel).
how can i make my program feel if any device or usb device plugged into the computer or unplugged.url...
View 3 RepliesA Problem in accessing a device from VB Windows cannot load the device driver for this hardware because there is a duplicate device already running in the system. (Code 42) This error is because i am using 2 devices of the same company which has the mass usb storage on it and when i install one of the device the other hides. So one is detected the Other is not. It also give a error called designed dragnonacally something...
View 2 RepliesI have a usb instrument and a driver who's printed output dumps a data string to the computer I need to be able to read this string into vba The driver manual provides the content of the string but no info on how to access the data.
View 1 RepliesI've created a custom USB device using a PIC18F4550 and I'm having trouble with reading information from the device. The device sends reports without a request from the application as 64 bytes. I'm relatively new to VB and this is my first foray into USB as well... It's not going good. I've set the Vendor ID to Hex 1234 and the Hardware ID to Hex 0001. I've used different libraries and the timer to check for incoming reports, but I can't seem to figure it out. I've waded through pages of USB Complete and all kinds of code for mice and barcode scanners, but nothing so far that will do anything for my device.. how I can register the device and get the raw report from the device and display it in a text box
View 1 RepliesHow can I read data from a HID device (USB RFID Reader)and which acts like a keyboard.
View 4 RepliesI have a sim card reader, that is a usb-to serial device. It has a sim card inserted. what i need to do is access that sim card to get the data, phonebook and sms for example. I CAN connect to the reader but i cannot send any commands or recieve any data.
What are the commands i could use to access data held on the device. The chipset is pl-2303
What is the best way to go about retrieving data from a proprietary hardware device that interfaces via HID USB? The particular device I need the data from is a blood-pressure/heartbeat measurement & monitoring device.The hardware came with software that downloads the data from the device and places that data into a (passworded/encrypted) MS Access database that I cannot connect to using programmatic methods, at least not without having the (admin's) password. The software provided produces reports, but the formatting renders them virtually useless (well, completely useless) for the needs of our company.
The device manufacturer provides to it's customers no API or any other technical information for accessing the data produced by their product; so, this pretty much leaves me stuck trying to figure out how to obtain the data via custom application in order to reclaim the initial justification for the expense associated with the hardware, which by the way has already been purchased.I don't need code snippits specifically, though examples would be nice; what I really need is to know is how to best approach this project, from a general design and programming stand-point.
I have developed a simple software using VB.net, now i want to receive some data from an external device,How to read a hardware transmitted data using VB.net, where hardware is attached to a USB port?"
View 1 RepliesI have an xml file stored on an web server and I need to read the data using vb.net for a smart device application.I also need the ability to select indvidual nodes of the xml file. It currently a simple file but will be expanded upon. [code] I need to access the name node to start with.
View 2 RepliesI need some sample code for sending data to the MIDI device on the computer? I'm not quite sure what the hardware's address is though.
View 2 Repliesust want to ask if its possible for me to measure how many bytes of data does a device sent to my computer using vb.net?
View 3 RepliesI am trying to read data from an external device using MSComm control but the problem is I am getting wrong data. I am recieving 1 byte data but the first three bits are wrong so anything greater than 31 sent from the external devices is recieved wrongly. eg. if I am sending 63(111111) from the device then the input from MSComm control gives me 159(10011111).Due to this reason I tried SerialPort from .Net framework and was surprised to see that it is working properly.
View 3 RepliesI have 20-30 devices that I am connecting to and gathering data from. I want to display six or seven lines of data for each device on the same screen, then allow the user to click the object containing the device and show more detail on a separate form. There aren't any other programmers where I work and am looking for advice on how most efficiently to implement this. I have tried TableLayoutPanels, Datagrids, Textboxes, ListBoxes and I am probably not implementing them right, but they don't seem to be getting me where I want to go. I am also trying to stay away from hardcoding objects onto the screen.
View 3 RepliesI know how to open a communications port and read data from a wired usb device.
How can I open a communications port to read data from a wireless bluetooth device?
I have USB device that is detected as human interface device (HID). The device has one button on it. I want to have more of same devices attached to one PC. I would like to simulate a click on that device (it is not a mouse!). It should be simple using Windows API, but I just can't seem to find an example or at least function that does that (I successfully found code that takes position of a MOUSE, and sends click to a MOUSE, but I need that for my HID). What i really need is an example how to simulate click on HID (something like joystick).Second question is a bit more complicated and I can't find a solution. The HID when button is clicked returns data (5-6 bytes). But data returned is immediately printed to the screen (like i typed it on keyboard) and it is followed by CR, however no data is left on clipboard. I don't know how to get that data to my program. Detecting keystrokes using Windows API (something like keylogger), or to make a control (richtextbox) and retrieve data from that control? Thou important notice is that my program is complicated, involves multithreading (cross-thread operations are a mess) and is TIME CRITICAL (as much as it can be on Windows - you get what I mean), so cross-thread access of control will slow me down a lot or even just won't work. Something like this:[code]Even if this problem is solved it still makes it buggy because user should be able to use GUI all the time.
View 5 Replies
