Serial port equipment communication method and system

Abstract

The invention relates to a serial port equipment communication method and system. According to the method and the system, the data request command of an upper computer can be cached by a serial port server, and the result is transmitted to a serial port driver by using an active reporting mode without receiving the data request command of the upper computer in caching; besides, the serial port server reports the present data to the serial port driver to be cached by the serial port driver when the data are changed instead of reporting every data of serial port equipment, and then the upper computer can inquire the data of the serial port equipment from the serial port driver anytime so that the upper computer can inquire the serial port equipment in real time and delay can be reduced, active reporting is adopted and reporting is performed when the data are changed and thus large amount of traffic and bandwidth can be saved and the network pressure can be effectively reduced.

Description

technical field [0001] The invention relates to communication technology, in particular to a communication method and system for a serial port device. Background technique [0002] Remote monitoring system is widely used in various occasions. For example, in a large computer room, it is necessary to monitor the environment and parameters of the computer room. [0003] Such as figure 1 As shown, in general, the remote monitoring system 300 will include a remote server 31 and a serial port server 32, wherein the serial port server 32 is connected to the serial port device 34, such as various data collectors, sensors, etc., through a physical cable 32A, The serial port device 34 and the serial port server 32 are connected by serial port communication (such as RS232 / RS485), and the two are connected by a physical cable 32A, so there is no problem of bandwidth limitation. [0004] The physical distance between the remote server 31 and the serial server 32 is generally relative...

AI Technical Summary

Problems solved by technology

[0005] However, the inventors of the present invention have found that in the prior art, at first, the serial port server 32 needs to directly communicate with the serial port device 34, so a protocol (such as RS232 / RS485, etc.) matching the serial port communication needs to be adopted, that is to say, the serial port The server 32 needs to be designed for matching with different serial port devices 34, or needs to be manually configured, which is cumbersome;

[0006] Secondly, the serial port communication protocol adopted a polling mechanism (master-slave architecture), such as polling per second, when the serial port device 34 was a physical device, there was no problem of flow and bandwidth, but when the TCP / IP network was adopted Sometimes, when the number of serial devices is large, polling will bring huge network pressure

Images