LED network wireless management system based on server and IE browser

1 Network management system based on server and IE browser

The network management system based on server and IE browser mainly consists of three parts: one is the network device. Guangzhou Zhiyuan Electronics can provide a variety of network devices such as serial device network server and wireless GPRS DTU; the second is the server, which is generally built by the customer himself; the third is the client. In this method, the client does not need to install additional software, but is completed by the IE browser.

2 Application Cases: LED Network Wireless Management System

LED network wireless management system realizes the real-time remote monitoring of the display data of LED display screen by users. Its main principle is: the LED display screen located on site is connected to the wireless DTU through the serial port (RS232/485/422), and the DTU is connected to the server communication of the Internet through GPRS to realize data transmission. The server connected to the Internet is the remote control server of the display screen. Users log in to the server through the browser to complete the update of display data and the monitoring of equipment operation.

2.1 Introduction to LED

As a new information medium, LED display screen has outstanding advantages in performance. It has long service life, fast response speed, long viewing distance, high brightness, large viewing angle, low power consumption, simple driving, impact resistance and stable performance. Therefore, it has been widely used in various fields of society. Figure 1 shows some applications of LED display screen in real life.

2.2 Selection of communication method for LED network management system

At present, data transmission of outdoor LED display screens can be carried out in the following ways.

①The LED display is directly connected to the computer via a data cable, and the computer is used to directly control the LED display. This data transmission method requires wiring, has disadvantages such as inconvenient installation, high maintenance costs, and limited transmission distance. It is also difficult for users to remotely control.

② The staff use portable computers to update data on site. The disadvantage of this data transmission method is that it is difficult to achieve real-time update of display data, difficult to timely discover faults in the LED display, and also increases the labor intensity of the staff and the human cost of enterprise operation.

③Control the LED display screen through short messages. The disadvantage of this data transmission method is that short messages are difficult to edit and the amount of data transmitted is relatively small. At the same time, there is a certain delay in the transmission of short messages, and it is difficult to ensure the real-time nature of the data, especially in situations where real-time information display is required, such as road traffic and stadiums.

④Control the LED display screen through GPRS/CDMA wireless data transmission. The advantage of this transmission method is that it is fast, not limited by time and space, and can update the display data in real time. Therefore, using wireless data transmission becomes an ideal choice.

2.3 Composition of LED Wireless Network Management System

Wireless data transmission can be done by GPRS or CDMA. The average service rate of GPRS can reach 20 kbps to 40 kbps, and the average service rate of CDMA 1X is 80 kbps to 100 kbps. As far as the current network conditions are concerned, CDMA is fast and suitable for wireless Internet access in cities or not too remote villages, and can roam across the country; GPRS is not as fast as CDMA, but the network coverage in remote areas is worse than CDMA. If the user's equipment is installed in remote mountainous areas or villages, GPRS should be used for data transmission.

The whole system in this scheme consists of LED display screen, GPRS wireless data transmission equipment (DTU) ZWG-23A, server and remote monitoring terminal, and its composition scheme is shown in Figure 2.

As can be seen from the figure, the LED display screen located on site is connected to the DTU via the serial port (RS232/485/422), and the DTU communicates with the server connected to the Internet through the GPRS network and the Internet to achieve data communication. The server connected to the Internet is the remote control server of the display screen. After the system is put into operation, users can use IE browser to access the server anywhere in the world to update and monitor the display data of the LED screen.

The advantage of this method is that the user's data update is not limited by time and place. Whether it is day or night, whether in the company or on a business trip, the user can update the display data of the LED display at any time as long as he has a computer with Internet access.

2.4 Server and Monitoring Service Software

A server is a specific computer that usually acts as a node in a network to provide a specific service to clients from different parts of the network. The "service" here is actually a computer program with specific functions that can run continuously. Under a modern operating system with multi-tasking capabilities, a computer can usually provide multiple services at the same time. From the perspective of "service", this computer actually plays the role of multiple servers. It can also be said that it is multiple "servers" rather than just a computer in the physical sense. All services running on it can reasonably use the computer's software and hardware resources under the coordination of the operating system.

The server in the remote control LED display system can provide at least the following services: Web server, database server, FTP server, etc. When the ZWG-23A on the LED display is connected to the server, the server automatically transmits the latest data to be displayed to the LED display through ZWG-23A. If the LED display fails during use, the fault can also be transmitted to the server through ZWG-23A. When the remote user logs in to the server through the IE browser, on the one hand, he can upload new data for the LED display to update, and on the other hand, he can view the current operation of each LED display in real time.

Technical maintenance personnel can also log in to the server to monitor the operation of the equipment and promptly identify equipment that needs maintenance.

According to the specific situation of each LED manufacturer, there are two ways to set up the server. One way is that the LED manufacturer purchases the server by itself, develops various software to run on the server by itself, and we provide the necessary equipment for wireless communication (ZWG-23A); the other way is that we customize all the software for the LED manufacturer, the LED manufacturer sets up the server, and we provide the necessary equipment for wireless communication (ZWG-23A).

We recommend the latter cooperation mode. In this mode, LED manufacturers can quickly obtain the "remote control LED display system" without investing any manpower or material resources, thereby enhancing their market competitiveness.

When the LED display screen is upgraded to use ZWG-23A for data transmission, it only needs to install the virtual serial port software on the server of the previous LED manufacturer or LED user. After simple settings, the server of the LED manufacturer or LED user can process data normally without any changes. The upgrade of RS232 to wireless connection is shown in Figure 3.

Conclusion

This article introduces the application examples of the network management system based on server and IE browser in the field of LED remote monitoring. From the examples, we can see that the advantages of this system are obvious and the industrial progress it brings is huge. This system can not only be widely used in the LED industry, but also has many potential markets in other industries. Guangzhou Zhiyuan Electronics is committed to providing professional network management systems based on servers and IE browsers. It can also customize network management software and provide various network devices according to customer requirements.