What is a virtual serial port and what is it for?
Free Virtual Serial Ports are Windows user mode applications that allow you to create software virtual serial ports and simulate physical serial port behavior. It only runs in user mode, so it is more stable and uses less memory, processor, and operating system resources than any of its competitors. It behaves exactly the same as a hardware serial port with full serial port functionality, providing baud rate simulation, data bit configuration, parity (odd, even, mark, space) and stop bits, XON/XOFF software and hardware flow control, etc.
A virtual COM port or virtual serial port is an ideal solution when a traditional software application expects to connect to a port (COM port or COMM port) on a serial port device, but cannot do so due to a physical lack of available serial ports. Instead, we reconfigure the computer to send serial data over the LAN or Internet just as if it were a real serial port. When a legacy application attempts to send data to a serial COM port, it is actually transmitted over a virtual serial port over a TCP/IP connection. The information sent back to the legacy application is also transmitted over a network received through a virtual serial port or virtual COM port, and eventually passed on to your legacy application.
Why use virtual COM ports?
Most modern desktop and notebook computers no longer use the older DB9 RS232 serial ports (COM ports) traditionally used to connect directly to hardware used in commercial, laboratory, or industrial security and control systems. In many cases, even if they do, the number of ports available is very limited. Problems may arise if you still rely on traditional software applications that communicate over non-existent (or very limited) serial ports. The challenge here is not just to convert the interface of a serial device to a USB or Ethernet interface. That's because traditional software doesn't know how to recognize, read USB, Ethernet data, and restore the software engineer who originally coded it might not be an option.
Why do I lose data when transferring files using a virtual serial port?
At this point, the main reason is that the virtual serial port program ends the data faster, and the virtual program sends data to the remote device when the serial port transmission itself is slow, so the virtual program will lose data. This can be done by setting the "analog baud rate" in the virtual program.
Virtual serial software in many scenarios of serial data transmission is very common, there are people online to provide free virtual serial software, if there is a need to click to download.