Short And Long Range Data Acquisition On PC?
Mar 15, 2012
Assuming there are some sensors interfaced to a microcontroller in a remote unit. And for the transmission of these signals, bluetooth is used for short range and GSM is used for long range.Now on the PC side for (LOW COST and GOOD) data acquisition, which module is required for the bluetooth and GSM respectively? and what's the algorithm to be used in each case?Also for testing purposes, if a cable is to be used which cable is appropriate?
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Jun 5, 2011
How to Covert a long name to short name??? for example: How to convert Visual Basic name into VB
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Aug 1, 2009
im making a basic program, The relevant code is
SendKeys.Send("0000")
SendKeys.Send("{ENTER}")
Threading.Thread.Sleep(500)
but, i need to make it go from 0000 to 9999. but i don't wanna do 9999*3 lines of code. i need help. i got no idea about how to do this, i was trying to make my own program there would generrate the code for me, but did pretty much crash... so...
SendKeys.Send("0000")
SendKeys.Send("{ENTER}")
Threading.Thread.Sleep(500)
[code]......
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May 11, 2012
i have a very long clickable hyperlinkwith a lot of not necessary to see parameters in a narrow richtextbox
my code
###################################
....
[code].....
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Apr 19, 2011
I'm trying to make a macro for a game, so I use long spells in a shorter amount of time. I'm having trouble with a lot of things. For starters I get the when I start the programs timer: "A call to PInvoke function". (I'm calling it a hack, but it's not a hack because it doesn't hook into memory addresses, only sends keys when the correct combo are pressed)
Option Strict On
Public Class Form1
Private Property hEnabled As Boolean
Private Declare Function GetAsyncKeyState Lib "user32" (ByVal vkey As Long) As IntegerPrivate Sub Button1_Click(ByVal sender As System.Object, ByVal e As System.EventArgs) Handles Button1.Click
If (hEnabled = False) Then
[Code] .....
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Aug 26, 2009
I am trying to write a thread safe application that contains 3 threads : -
1 - Data acquisition and decoding
2- Data graphing
3 - FFT and filtering
Thread 1 is collecting bytes from the serial port and converting them int integers (so taking two bytes) after is has captured 64 Bytes and converted into 32 integers, it then needs to pass the array to the graphing thread.
The graphing thread then plots the data and waits for more data.
Thread 3 also waits until thread one has collected 2023 integers and takes these and performs some FFT calculations (which take time).
My question is how do i share the arrays between the three threads without deadlocking the program? as the serial thread will be flying around reasonable fast (1000 bytes per second) so it will synclock onto the shared buffers for most of the time.
Originally i was going to use two synchronised queues, so when thread 1 has collected 32 bytes it queues the data into the graph queue, and once it has collected 2023 it queues the data into the FFT queue.
Then thread 2 and 3 can simple dequeue the data.
However using queues has the overhead of casting the data in and out, and as i know the data type i was planning on using two arrays :-
Dim GraphArray() as ushort
Dim FFTArray() as ushort
Then Thread 1 adds data to each thread, and thread 2 and 3 simple wait until the correct amount of data is available before removing the data. my question is there an array type that allows me to remove x amount of data from an array?
Because i cannot do this easily with the ararys defined as above (GraphArray, FFTArray), as i was planning on making them 1mByte and allowing thread 1 to fill them Knowing they should never overflow and then let thread 2 and 3 remove x amout of bytes at a time unless there is a better way of doing it
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Nov 26, 2007
I had a copy of Visual Studio Professional on my old computer years ago, but decided against getting it on my new PC. Instead, I downloaded Microsoft's free offerings in the Express editions (C++, VB being the ones I am somewhat familiar with and interested in continuing).
I recently thought of an application that I would like to create, but am concerned that Visual Basic Express won't be able to handle it. I don't quite know what it means when 'they' say that Express can't work with remote data, so I will describe my application and let you tell me if I need to go ahead and get a pay-for version of VB.
a) USB temperature probe (like the one you used in high school chemistry, if you're young enough...) in fish tank, plugged into PC.
b) VB Express app intercepts the data stream and reads the temperature. (I can figure out numerical conversions if necessary using the Logger software which comes with the probe, and excel, if my VB application is showing numbers that follow a pattern with the temperature)
c) Application compares the temperature to the user-defined hi/low settings.
d) Application communicates wirelessly with an X10 Lamp Module, turning on or off the outlet, which is the same as turning on or off the 7.5 watt 'dumb' heater (no on/off switch; you plug it in to turn it on).I've seen ActiveX controls and code examples online that tell you how to code for X10 in visual basic)
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Nov 27, 2009
i need to build a small data acquisition terminal in VB express 2008. it would be able to accept data packets on any serial port or USB virtual serial port. and to parse and send the data to excel.
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Feb 18, 2011
How Can I Short My Data in datagrideview. I want to short by coloum like I have a OLOUM Received_Date I want to short this coloum.
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May 28, 2010
0x0006 is what I'm using in c#, how would I express this in vb.net?
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Jun 13, 2011
I am writing a program and I need to store important data like password, etc. What is the best way to store the password and where is the best way to store it?
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Jan 4, 2006
I recently posted a WIA sample project in the codebank in this forum here : [URL] What I was trying to do is provide a video preview of the webcam video in a window, but I am having problems with trying to pass in the Window Handle. It should be as simple as Adding a reference to "WIAVideo 1.0 Type Library", and then putting in the following
[Code]...
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Sep 18, 2011
Is there a easer way of coding in stead of wrighting long long paragraphs like this in one line [code]All of this is on one line and i got lots of info to put down.."The game will begin on your 16th birthday with your mother waking you up. Today you are to go to the castle for the first time. Leave your bed and open your dresser for a Strength Seed. "
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Oct 6, 2009
i want to create a user control using WIA but i m get a error message at run time Error Assembly generation failed -- Referenced assembly 'Interop.WIALib' does not have a strong name. i m working of windows server 2003.
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Dec 29, 2009
I am trying to split a long string of data into an array:
[Code]....
Ive tried a few ways to write out the regex, but to no avail. Also, sometimes responseFromServer2 contains newlines, and sometimes it does not, depending on the response I get from the server...
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Sep 26, 2011
I keep getting an over flow.I have two longs. The first is set to 16552800. I can add 32760 to it no problem. However I get an overflow error when I add 32820 to is.
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Jun 17, 2011
I have a table in Oracle that has a column with the Long data type. I create a simple recordset and bind it to a gridview.
Me.grdFollowup.DataSource = rsDataSet
Me.grdFollowup.DataBind()
All of the columns populate correctly except for the Long column. It returns a null for all rows. I have tested the SQL statement in Toad and it works perfectly. how to get an Oracle Long data type to populate in a gridview? This is driving me nuts
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Jun 12, 2011
What data type could I use in my access database that can hold very long texts. By default, each cell in Access tables can only contain up to 255 characters. Is there any way to extend this to any length I want?
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Nov 18, 2011
I have a DataGridView with one column, I set for that column
DefaultcelStyle->Wrapmode=True
Modify data a with a long string, I call also
vb.net
DataGridView1.AutoResizeRows()
DataGridView1.Refresh()
But the DataGridView doesn't refresh wrap,il looks like this : I change manually current selected row moving to another record and now the refresh is done :
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Dec 26, 2009
In Visual Studio 2008 I am using :Private Declare Function BlockInput Lib "user32" (ByVal fBlock As Long) As Long To stop input from occuring during a search-replace operation.
BlockInput(True) ' do not allow input during search and destroy
Dim cursorIcon As Cursor
cursorIcon = Cursor
Cursor.Current = Cursors.WaitCursor
Then setting it to false at the end of the operation. It did not work, so I thought maybe it was because I was calling it from a child window, so I created a function in the mainwindow, and ran it like this:
FrmMain.BlockFrmMainInput()With these functions is the Main window:
[Code]...
It did not solve the problem. I thought maybe it was because I was running under the debugger, so I tried compiling and running it debugger-free, but that did not do any better. I am still getting input when I double-click the mouse on either form.
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Apr 12, 2012
I am looking to pull a specific time of data from my sql Data Base, Is this correct or is there a different way to do it?
Dim sqlShift As String = "SELECT * FROM ShiftTasks WHERE Shift=@Shift, Time>=@Time1 and Time<=@Time2 ORDER BY [Shift], [Time], [Priority] DESC"
Using Con As New SqlConnection(ConnectionString)
[code]....
I found it, Needed to replace the , in the SQLShift String with an and
Dim sqlShift As String = "SELECT * FROM ShiftTasks WHERE Shift=@Shift and Time>=@Time1 and Time<=@Time2 ORDER BY [Shift], [Time], [Priority] DESC"
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Jan 21, 2011
I need to import data from Excel worksheet into the VB.Net program. First, I need to get the data to some array or arraylist and secondly to show the data to user through datagridview or similar.So far, I have this
Private Sub Button1_Click(ByVal sender As System.Object, ByVal e As System.EventArgs) Handles Button1.Click
Dim myDataset As New DataSet()
Dim strConn As String = "Provider=Microsoft.Jet.OLEDB.4.0;" & "Data Source=C:TempTest.xls ;" & "Extended Properties=Excel 8.0;"[code].....
How can I adjust the code to manage that? And how can I import the same range to variables (the range contains approx. 200 rows and 30 columns of data points) and I need the flexibility to add or delete items (rows) from the data in memory later.
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Sep 16, 2009
i dun know wats wrong wit my code.....i would like to search the date which located between 2 date time picker and make it goes into print preview.
Dim CustomerFound As Boolean = False
Dim daterange As String
daterange = "[Date of Booking] >=#" & Datetimepicker1.Text & "# AND [Date of Booking] <=#" &
[code]......
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Jun 8, 2011
im doing an employee attendance monitoring system, and i need to have a search feature which shows an employee attendance record in a given range of dates
example[code...]
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Apr 28, 2010
I am trying to open an exisiting excel sheet and then I want to copy a range of cells in to an array in one shot instead of looping thru cell by cell.And then I want to do some calculations and then move them to database tables.[code]...
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May 17, 2011
I am developing one desktop application using vb.net 2008 and Microsoft SQL Server 2005. fetching the data from database between a given range.
the date field in my table is of type VARCHAR(25) and the date format stored is dd-mm-yyyy. when I using the between clause in the SQL query then it is not giving all the data every time i.e. the date criteria in where clause is not working fine.
while my clients requirement is to keep the date format as dd-mm-yyyy and fetch the data according to the given range.
I search on the forum and found many queries to fetch the data by converting or type casting the date field within sql query but nothing worked.
The table structure that I am using is as follows
USE [Firm_master]
GO
/****** Object: Table [dbo].[tblTransaction] Script Date: 05/17/2011 21:49:11 ******/
[Code]....
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Mar 16, 2009
I am having trouble with a table adapter i am working on. In the table adaptor query i am having adaptor take a sum of the data that falls within a date range in a few columns. then i have some text boxes on my program refencing the columns that are being summed together. The program then gives me an error when i go to run the function.
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May 14, 2010
The fact is I'm making an application, which users can install by using a Setup file...once installed the data in the database can be updated by a centralized server. To do this, they can insert a DVD/CD-ROM and export the necessary data towards it. I need to do it that way, because some of the users who really need this data will be using stand alone computers.The application gets it's data from a mdb-file and the connection remains open as long a person works with the application (maybe not the best way to do, but I know :-) )...when the user uses the application, he can perform an export...this exports the .ini-file and pictures (which works fine), but he also needs to export the mdb behind the application...I already tried connection.close() before and connection.open() after the System.IO.File.Copy...but that doesn't seems to work.
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Jul 3, 2010
I've been searching for hours tonight searching existing posts, other websites and all i can find are examples of how to capture a image from a webcam.Does anyone have any code that simple talks to the camera device via WIA, and then saves every image found on the device to a hard drive?I found this code below. Credit i cant tell you as i have a bunch of different flavors of code, but this only saves the file as a tmp file, and not the actual image file i expected after selecting?
Imports System.Drawing
Imports System.Runtime.InteropServices
Imports WIALib
[code].....
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Dec 14, 2009
I am using the following code in the Load method of a VB form to generate random numbers in the range 1 to 8. Without fail after enough loops the range is exceeded and 9 is the random number returned every time. The line using the Rnd function is from: Rnd Function (Visual Basic)
[Code]...
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