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by: Al the programmer |
last post by:
I need to access the serial ports on my webserver from an asp.net page. I
have no problem accessing the serial ports from a windows form application,
but the code doesn't work in asp.net. I have been told it is not possible to
access the serial ports from asp.net.
The application is used to control custom hardware. The hardware is
connected to a PC through serial ports. Our customer wants to control the
hardware from a remote...
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by: David |
last post by:
I have written an application in VB.NET 2003 that uses the SAX serial
component for RS232 communications with hardware.
The program sets up 2 serial ports so that it can talk to 2 different
hardware devices simultaneaously.
When I run the program on a desktop running Windows 2000 it works fine. When
I run it on a Laptop using XP I start having problems.
It seems that when the ports are initiated, either one will work but not the
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by: David |
last post by:
I am having trouble with "ACCESS DENIED" error messages in a VB.NET 2003
application when attempting to open
serial comms ports.
The application has 2 ports that connect via serial cable to 2 different
hardware devices to transfer binary data to the application. The setup
screen enables the user to select COM1 -- COM8 via combo boax for each port.
Then they click "Apply" to open the ports.
The code that I have written to open the...
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by: ken |
last post by:
Hello everyone,
I'm new to visual VB and I am trying to setup communications using the
Function ReceiveSerialData() As String example found in the help
section of Microsoft Visual Basic 2005 Express Edition.
Sample Code:
Function ReceiveSerialData() As String
' Receive strings from a serial port.
Dim returnStr As String = ""
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by: Tom Brown |
last post by:
Hey people,
I've written a python app that r/w eight serial ports to control eight devices
using eight threads. This all works very nicely in Linux. I even put a GUI on
it using PyQt4. Still works nicely.
Then I put the app on on a virtual Windows machine running inside of vmware on
the same Linux box. Vmware only lets me have four serial ports so I run the
app against four serial ports using four threads. The app did not respond...
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by: LongBow |
last post by:
Hello,
Is there a way, in .NET, to determine what are the avialable Serial
(Communications) Ports on a Windows OS and is there a way to determine
that port isn't being use other than attempting to opening the Serial
Port and catching the associated exception? Thanks
If there isn't a way to determine the Serial Port within .NET I would
be willing, I guess, to use a WinAPI is that was the only way.
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by: joaquimfpinto |
last post by:
Dear All,
I made an app in c# that uses several serial ports.
For the serial ports I use a pnp Sunix board, some with 8 serial ports
other with 4 or even 2 serial ports.
Whenever I use the development computer I don't have ay problem with
my application.
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by: Wanxi |
last post by:
Hi everyone,
I am testing one of the example -> <UsingTheSerialPort> at VB101SamplesBCL2.
But there are some error which i don't know how to edit. I found some post that having the same problem with me.
I understand that i need to use Invoke method, because there is a different level of thread, so the update on the textBox is not valid..
But i really don't know where to add and what are the variables.
I at least need to show up...
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by: naveen.sabapathy |
last post by:
Hi,
I am trying to use virtual serial ports to develop/test my serial
communication program. Running in to trouble...
I am using com0com to create the virtual ports. The virtual ports
seem to be working fine when I test it with Hyperterminal .
I am using the example program that comes with pyserial, as below.
---------------
import serial
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by: Nasif |
last post by:
Currently I am writing a program which sends and receives messages
through serial port to a device. I am using C# and Microsoft Visual
studio 2005 for windows program. But my problem is when i try to write
in serial port from my windows a Timeoutexception is thrown. I use
SerialPort class in System.IO.Ports and for writing port i used
write() function under the built in class SerialPort. But when i use
hyperterminal , everything goes fine....
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by: Hystou |
last post by:
Most computers default to English, but sometimes we require a different language, especially when relocating. Forgot to request a specific language before your computer shipped? No problem! You can effortlessly switch the default language on Windows 10 without reinstalling. I'll walk you through it.
First, let's disable language synchronization. With a Microsoft account, language settings sync across devices. To prevent any complications,...
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by: Oralloy |
last post by:
Hello folks,
I am unable to find appropriate documentation on the type promotion of bit-fields when using the generalised comparison operator "<=>".
The problem is that using the GNU compilers, it seems that the internal comparison operator "<=>" tries to promote arguments from unsigned to signed.
This is as boiled down as I can make it.
Here is my compilation command:
g++-12 -std=c++20 -Wnarrowing bit_field.cpp
Here is the code in...
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by: jinu1996 |
last post by:
In today's digital age, having a compelling online presence is paramount for businesses aiming to thrive in a competitive landscape. At the heart of this digital strategy lies an intricately woven tapestry of website design and digital marketing. It's not merely about having a website; it's about crafting an immersive digital experience that captivates audiences and drives business growth.
The Art of Business Website Design
Your website is...
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by: tracyyun |
last post by:
Dear forum friends,
With the development of smart home technology, a variety of wireless communication protocols have appeared on the market, such as Zigbee, Z-Wave, Wi-Fi, Bluetooth, etc. Each protocol has its own unique characteristics and advantages, but as a user who is planning to build a smart home system, I am a bit confused by the choice of these technologies. I'm particularly interested in Zigbee because I've heard it does some...
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by: agi2029 |
last post by:
Let's talk about the concept of autonomous AI software engineers and no-code agents. These AIs are designed to manage the entire lifecycle of a software development project—planning, coding, testing, and deployment—without human intervention. Imagine an AI that can take a project description, break it down, write the code, debug it, and then launch it, all on its own....
Now, this would greatly impact the work of software developers. The idea...
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by: isladogs |
last post by:
The next Access Europe User Group meeting will be on Wednesday 1 May 2024 starting at 18:00 UK time (6PM UTC+1) and finishing by 19:30 (7.30PM).
In this session, we are pleased to welcome a new presenter, Adolph Dupré who will be discussing some powerful techniques for using class modules.
He will explain when you may want to use classes instead of User Defined Types (UDT). For example, to manage the data in unbound forms.
Adolph will...
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by: conductexam |
last post by:
I have .net C# application in which I am extracting data from word file and save it in database particularly. To store word all data as it is I am converting the whole word file firstly in HTML and then checking html paragraph one by one.
At the time of converting from word file to html my equations which are in the word document file was convert into image.
Globals.ThisAddIn.Application.ActiveDocument.Select();...
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by: muto222 |
last post by:
How can i add a mobile payment intergratation into php mysql website.
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by: bsmnconsultancy |
last post by:
In today's digital era, a well-designed website is crucial for businesses looking to succeed. Whether you're a small business owner or a large corporation in Toronto, having a strong online presence can significantly impact your brand's success. BSMN Consultancy, a leader in Website Development in Toronto offers valuable insights into creating effective websites that not only look great but also perform exceptionally well. In this comprehensive...
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