In response to the development of the times, the current wireless control has more and more features, even in the office can control the outside of the LED display. So in the end there are several kinds of LED display wireless control method? Let ainengLED display Xiaobian to give you the following analysis:
First, RF wireless control
How it works: One end of the RF module is connected to the control computer and the other end is connected to the control card serial port. After installing the driver, the computer generates a virtual serial port and sends the data through this serial port.
Features: easy installation and commissioning, data transmission distance of up to 300-1000 meters, no later use the cost.
Required equipment and price: RF send, accept module, about 350 yuan pair. Support one-to-many transmission, that is, a sending module for multiple receiving modules.
Disadvantages: radio frequency band, the state allows the civilian not much, 433MHZ this batch, extremely susceptible to signal interference, and this way the transmission rate is not very low, the baud rate can only be used 4800 or 9600, is not recommended.
Second, WIFI wireless control
How it works: through the installation of wireless router or other wireless devices, and the user's original wireless network bridge, set up a wireless LAN, easy to network control card into the wireless network, the wireless network control.
Features: no wiring, easy installation and commissioning, data transmission speed.
Equipment required and the price: bridge, 800 yuan or less; wireless router (in the application of the screen is best to choose the antenna can be changed, so that can effectively receive the wireless signal), the price of 100 yuan
Disadvantages: communication distance depends mainly on the bridge's gain capability, wireless routing communication distance is relatively short, wall signal is weak or no signal. Suitable for short-range wireless signals. If your area of the screen where there is a wireless signal coverage, it is more simple, and only need to display the wireless card connected to the control card connected to your wireless network, you can in the network any computer On the control of the display.
Third, GPRS wireless control
How it works: GPRS module power to complete the process of dial-up Internet access, connected to the data center server, the client through the client software to access the server, the server for information forwarding.
Features: easy installation and commissioning, there is no distance limit, as long as there is a mobile phone signal, you can receive information, and the price is cheaper, generally in the 200 to 400 yuan range.
Disadvantages: GPRS module need to install a mobile phone card to dial the Internet, the monthly will have a certain traffic costs (such as China Mobile minimum 5 yuan flow package can meet the demand). By the GPRS bandwidth limit, the transmission rate is slightly slower, so that is more suitable for single-color main play text led display.
Fourth, 3G (WCDMA) wireless control
How it works: 3G module is also connected to the data center through the wireless network server, the customer directly to the global network platform to publish the program, sent directly from the server to the control card.
Features: WCDMA signal stability, in the process of sending the program will not be the basic loss of data, compared to GPRS faster, you can send pictures or video, more suitable for full-color screen.
Disadvantages: Unicom signal coverage is not as high as China Mobile, in individual remote areas may be unable to network situation.
Fifth, 4G all Netcom wireless control
How it works: basically the same as 3G / GPRS.
Features: 4G all Netcom (China Mobile, China Unicom, China Telecom full range of support), transmission speed, full realization of real-time control, send instructions can instantly respond to the relevant control.
Disadvantages: send a relatively large amount of data, the flow is relatively large, it is recommended to open flow packages.
