LED electronic screen is the perfect combination of technology and media, it can put the dream, science and technology, trend, fashion concept to show, it can become a new force of the new indoor large LED screen, outdoor advertising forms continue to appear, from the traditional LED billboards, to the monochrome walking screen, and to today’s full-color LED screen. Outdoor media advertising forms with the development of the LED industry, has become more and more trendy and fashionable.
01, WIFI wireless control
Working principle: By installing a wireless router or other wireless equipment, bridge with the user’s original wireless network, build a wireless local area network, and conveniently integrate the network control card into the wireless network for wireless network control.
Features: no wiring, easy installation and debugging, fast data transmission speed.
Required equipment and price: Bridge, less than 800 yuan; Wireless router (it is best to choose a device with an exchangeable antenna on the display screen, so that it can effectively receive wireless signals), the price is about 100 yuan.
Disadvantages: The communication distance mainly depends on the gain capability of the bridge, the communication distance of the wireless route is relatively short, and the partition wall signal is relatively weak or no signal. Suitable for places with short distance wireless signal. If your display area already has wireless signal coverage, it is even simpler, just need to bridge the wireless router connected to the control card in the display to your wireless network, you can control the led display on any computer on the Intranet.
02, RF unlimited control working principle
One end of the RF module is connected to the control computer, and the other end is connected to the serial port of the control card. After the driver is installed on the computer, a virtual serial port is generated and data is sent through this serial port.
Features: Easy installation and debugging, data transmission distance up to 300-1000 meters, no cost for later use. Required equipment and price: RF transmitting and receiving modules, about 350 yuan per pair. Support one-to-many sending, that is, one sending module to multiple receiving modules.
Disadvantages: The radio frequency band, the country allows not much civil, 433MHZ of this batch, extremely vulnerable to signal interference, and this way the transmission rate is not very low, the baud rate can only use 4800 or 9600, not recommended.
03, GPRS wireless control
Working principle: After the GPRS module is powered on, it completes the process of dial-up Internet access, connects to the data center server, the client accesses the server through the client software, and the server forwards the information.
Features: easy to install and debug, no distance restrictions, as long as there is a mobile phone signal, you can receive information, and the price is relatively cheap, generally in the range of 200 to 400 yuan.
Disadvantages: The GPRS module needs to install a mobile phone card to dial up the Internet, which will generate a certain amount of traffic costs every month (like China Mobile’s minimum 5 yuan traffic package can meet the demand). Limited by GPRS bandwidth, the transmission rate is slightly slow, so it is more suitable for single and two-color LED large screen that mainly plays text.
04, 4G full Netcom unlimited control
Working principle: The same as 3G/GPRS.
Features: 4G full Netcom (China Mobile, China Unicom, China Telecom full series support), fast transmission rate, full real-time control, send instructions can instantly respond to relevant control.
Disadvantages: In the case of sending a large amount of data, the traffic cost is relatively large, it is recommended to open a traffic plan.
