Apr 09, 2018 The Null-modem emulator (com0com) is a kernel-mode virtual serial port driver for Windows. You can create an unlimited number of virtual COM port pairs and use any pair to connect one COM port based application to another.
I often use HyperTerminal in Windows XP. The problem is that it just supports COM and telnet. I know COM Port is very old-fashioned, but I can't replace it with USB because there is no such program for USB.
Is USB bad for connecting computers? Or I just mistaked something?
First, you should use PuTTY instead of Hyperterminal as it's better in pretty much every way.
A terminal will commonly work with the following methods of communication:
The first two require the device you are trying to reach has an IP and supports the protocol in question.The second requires the device be connected to your system via a COM port on Windows.
Now if you are expecting to do a RS-232 style terminal connection over USB, it must be a USB serial port. You can buy RS-232 to USB converters. Some devices have a USB port that implements a RS-232 to USB converter internally. On Windows, for any kind of hardware like this, you'll likely need to install a manufacturer-provided driver - this is probably why you are having trouble. Then, in devmgmt.msc
, under Ports, you'll see an extra COM port. You can use this to talk to your device through PuTTY (or Hyperterminal, if you insist.)
I'm developing a project that has a number of hardware sensors connecting to the deployment machine through RS232 serial ports.
But .. I'm developing on a machine without an physical RS232 serial ports, but I would like to make fake serial ports that I can connect to and output data from with the aim of faking input from hardware sensors.
Does anyone know of a way to create a fake serial port and control it on Windows XP?
If you are developing for Windows, the com0com project might be, what you are looking for.
It provides pairs of virtual COM ports that are linked via a nullmodem connetion. You can then use your favorite terminal application or whatever you like to send data to one COM port and recieve from the other one. The office dvd amazon.
As Thomas pointed out the project lacks of a signed driver, which is especially problematic on certain Windows version (e.g. Windows 7 x64).
There are a couple of unofficial com0com versions around that do contain a signed driver. One recent verion (3.0.0.0) can be downloaded e.g. from here.
I know this is an old post, but in case someone else happens upon this question, one good option is Virtual Serial Port Emulator (VSPE) from EterlogicIt provides an API for creating kernel mode virtual comport devices, i.e. connectors, mappers, splitters etc.
However, some of the advertised capabilities were reallynot capabilitiesat all.
EDIT
A much better choice, Eltima. This product is fully baked. Good developer tech support. The product did all it claimed to do. Product options include both desktop applications, as well as software development kits with APIs.
Neither of these products are open source, or free. However, as other posts here have pointed out, there are other options. Here is a list of various serial utilities:
com0com (current)
com0com - With Signed Driver (old version)
and, yet another place for com0com with Signed Driver(Pete's Blog)
Tactical Software
Termite
COM Port Serial Emulator
Kermit (obsolete, but still downloadable)
HWVSP3
HHD Software (free edition)
I use com0com - With Signed Driver, on windows 7 x64 to emulate COM3 AND COM4 as a pair.
Then i use COM Dataport Emulator to recieve from COM4. Miss pooja video song download bari bari barsi.
Then i open COM3 with the app im developping (c#) and send data to COM3.
The data sent thru COM3 is received by COM4 and shown by 'COM Dataport Emulator' who can also send back a response (not automated).
So with this 2 great programs i managed to emulate Serial RS-232 comunication.
Hope it helps.
Both programs are free!!!!!
Another alternative, even though the OP did not ask for it:
There exist usb-to-serial adapters. Depending on the type of adapter, you may also need a nullmodem cable, too.
They are extremely easy to use under linux, work under windows, too, if you have got working drivers installed.
That way you can work directly with the sensors, and you do not have to try and emulate data. That way you are maybe even save from building an anemic system.(Due to your emulated data inputs not covering all cases, leading you to a brittle system.)
Its often better to work with the real stuff.
There's always the hardware route. Purchase two USB to serial converters, and connect them via a NULL modem.
Pro tips:1) Windows may assign new COM ports to the adapters after every device sleep or reboot.2) The market leaders in chips for USB to serial are Prolific and FTDI. Both companies are battling knockoffs, and may be blocked in future official Windows drivers. The Linux drivers however work fine with the clones.