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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: Marty Cruise |
last post by:
I understand how easy it is to use the my.computer.network.ping command, but
is it as easy to check for a response on a given port?
How can I check for a response for port x at 123.456.789?
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by: pandi |
last post by:
Hi,
I am using a check scanner.It has functions which gives output like image ,checknumber. i am using serial port to get this output in my coding. My problem is i am not able to read the display image ( which i scanned using scanner ). I used serail port as well as MSCOMM control.but i couldn't get the output. Can anybody knows this and help me to sort out my problem -- it is very urgent
here i am using windows 2000 professional OS and i...
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by: bmearns |
last post by:
Is it possible to specify which port to use as the outbound port on a
connection? I have the IP address and port number for the computer I'm
trying to connect to (not listening for), but it's expecting my
connection on a certain port.
Specifically, I'm trying to write an FTP host, and I'm trying to
implement the PORT command. From everything I've read, the client
supplies the IP address and port number for where I'm supposed to
connect...
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by: NoOne |
last post by:
Hi everybody!
I'm want to check if a certain port is opened or closed.
now I'm using try-catch to connect to the port. if it fails, it meas that
the port is closed.
The problem is that this method is extremely inefficient! anyone has a
better idea on how to do this kind of verification?
Thanks!
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by: evle |
last post by:
haw to read data from an Infrared Infrared Remote Control
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by: Rob |
last post by:
Hi all,
I am fairly new to python, but not programming and embedded. I am
having an issue which I believe is related to the hardware, triggered
by the software read I am doing in pySerial. I am sending a short
message to a group of embedded boxes daisy chained via the serial port.
When I send a 'global' message, all the connected units should reply
with their Id and Ack in this format '0 Ack' To be certain that I
didn't miss a...
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by: Sir C4 |
last post by:
Can someone give a quick example of how to check for activity on a TCP
port? For example, I'd like to watch and listen for activity on port
80. Once activity is detected, I'd like an event to be triggered.
Thanks in advanced.
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by: Rainer Borchmann |
last post by:
Hi,
please can anyone tell me what is wrong with this code ?
i have an oszilloskop on the COM1 ,and nothing comes out of it.
Rainer
VS2005
..............................
private void button1_Click(object sender, EventArgs e)
{
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by: ssndk123 |
last post by:
Hi,
Using the UserPort program that changes permissions in XP so that I am
able to write directly to the parallel port using assembler..
I'm trying to send out square wave pulses for x number of seconds. I'm
able to write and read from the parallel port, but after a few reads
and writes it crashes... how many reads and writes before it crashes
is not always the same.. sometimes it crashes at the first write or
read.. other times it...
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by: marktang |
last post by:
ONU (Optical Network Unit) is one of the key components for providing high-speed Internet services. Its primary function is to act as an endpoint device located at the user's premises. However, people are often confused as to whether an ONU can Work As a Router. In this blog post, we’ll explore What is ONU, What Is Router, ONU & Router’s main usage, and What is the difference between ONU and Router. Let’s take a closer look !
Part I. Meaning of...
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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: 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: 6302768590 |
last post by:
Hai team
i want code for transfer the data from one system to another through IP address by using C# our system has to for every 5mins then we have to update the data what the data is updated we have to send another system
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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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