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by: mimisam |
last post by:
hi,
I am using Win XP and writing an application to check POS devices
(printer and cash drawer).In the application I need to choose the port
which the device is connected to. If the port chosen is wrong or the
device is off power, a communication error message should be
displayed.
I am using FileOutputStream and FileInputStream to send and receive
data from the ports. When parallel port is used, I got the feedback
when the printer is...
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by: willie |
last post by:
Hi,
I'm writing a program which requires the use of three serial ports and
one parallel port. My application has a scanning devices on each port,
which I can access fine with pyserial. However, I'm unsure of how
exactly I should be designing the program, I thought I could use
threading to start class:
class scanner(Thread):
def __init__(self,port):
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by: Sonoman |
last post by:
Hi all:
I tried searching on the net, but I do not even know what I am looking
for. What I want to do is to write aprogram using C++ that will gather
data from an external microprocessor, format it and write it to a file
for later use. I can handle pretty much everything exept the part where
I "listen" to either the serial or parallel (may be USB?) ports for data
from the external source. Any help will be greatly appreciated.
Sonoman
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by: The Man With The Harmonica |
last post by:
Hi All,
What kind of commands can I use to control the serial and parallel port of
my pc. I want to use my laptop instead of microcontrollers and write my
software in ANSI C to be used for control purposes of sensors and other
electronic devices.
I haven't done any C for a while now so I would assume my knowledge is that
of a beginner now.
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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: 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: Soren |
last post by:
Hi,
I want to control some motors using the parallel port.. however, my
laptop does not have any parallel ports (very few do). What I do have
is a USB->Parallel converter... I thought about using PyParallel, but
the USB->Parallel converter doesn't actually map to the LPT port ..
and PyParallel only looks for LPT ports?
Has anyone tried doing this? What are my options for controlling
parallel connections on a laptop with no parallel...
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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: 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: TSSRALBI |
last post by:
Hello
I'm a network technician in training and I need your help.
I am currently learning how to create and manage the different types of VPNs and I have a question about LAN-to-LAN VPNs.
The last exercise I practiced was to create a LAN-to-LAN VPN between two Pfsense firewalls, by using IPSEC protocols.
I succeeded, with both firewalls in the same network. But I'm wondering if it's possible to do the same thing, with 2 Pfsense firewalls...
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by: adsilva |
last post by:
A Windows Forms form does not have the event Unload, like VB6. What one acts like?
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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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