RS232 serial port server is a kind of serial port server, and its serial port has RS232 serial port. So its principle is the same as that of serial server. Because RS232 serial port has developed very well, RS232 interface is called "one of the most popular peripheral interface modes" internationally, which can provide an integrated solution for software and hardware communication.
Most modern electronic instruments, including measuring tools and laboratory instruments (balance, electrochemical instrument, spectrometer, spectrometer, etc. ) Connect to the computer using a standard RS232 serial line. RS232 protocol has existed for many years, and many cost-effective software and hardware solutions have been established. More than 90% computers are equipped with at least one RS232 port with an additional adapter. There are hundreds of software applications that can be used to communicate with instruments through RS232 connection. Because of its flexibility and universality, RS232 standard is likely to be still applicable in the future.
The problem of RS232 communication is that it needs point-to-point serial line connection transmission, and the distance of serial line is limited. This requires each instrument communicating with it to use a separate serial line to connect to the only RS232 port on the PC. If you want to connect multiple devices to a PC, you must install multiple RS232 ports on the PC.
If the RS232 standard is to be improved, multiple connections will be allowed through one serial line, and the length of the serial line is not limited, and 100% will be compatible with all existing RS232 communication software.
Fortunately, there is a very simple way to achieve it. The original local serial port control function is extended by virtual serial port software, and it can still be used without modifying the original serial port program.
USR-VCOM can map TCP/IP connections, UDP broadcasts and devices connected to the cloud to local virtual serial ports, and applications can complete remote control and data transmission by accessing the virtual serial ports.
Virtual serial port software in the market usually does not need to pay, but the practicability of the software is uneven. Some people's serial port virtual software USR-VCOM is used with serial port servers, DTU, industrial routers USR-G800V2 and other communication devices with serial ports, which can support multiple virtual serial port mapping, TCP clients, TCP servers and UDP network protocols, and real-time virtual serial port data transmission monitoring.