Virtual.com Port Emulator
Virtual Serial Port Driver is an advanced COM port and null modem cable emulator. With Windows kernel technology Virtual COM Port allows you to create an unlimited number or COM port pairs, fully emulating serial port connections. When you create these virtual com port drivers, they appear to your system as copies of the original physical port. Another feature of this virtual com port emulator is the ability of multiple applications to share physical serial interfaces. This software tool lets you link a number of physical serial interfaces to one emulated COM port.
If you are developing for Windows, the 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. EDIT: 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. Download adobe illustrator 2017 torrent. 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 It provides an API for creating kernel mode virtual comport devices, i.e. Connectors, mappers, splitters etc. However, some of the advertised capabilities were really not capabilities at all. EDIT A much better choice,. 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.
Usb Virtual Com Port Emulator
However, as other posts here have pointed out, there are other options. Here is a list of various serial utilities: (current) (Pete's Blog) (obsolete, but still downloadable). Musica para atraer dinero urgente. 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.
Virtual Serial Ports Emulator
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. Note that USB serial adapters have different timing/bunching behavior from traditional UARTs. However, testing with one isn't a bad idea if there's any chance of one ever being used. When they first become popular, poorly designed or implemented protocols sometimes broke or slowed to a crawl when used with one.
Virtual Com Port Emulator Freeware
Today it is less likely that something gets out the door without being tried with a USB-attached-UART in development; indeed being tried on a traditional UART on a PC is what is now unlikely. – Feb 17 '18 at 22:07.