What are the wireless control schemes of LED electronic screen

With the development of LED industry, outdoor media advertising is becoming more and more popular. With the perfect combination of technology and media, LED electronic screen can continue to maintain the form of outdoor advertising, from the traditional LED billboard to monochrome screen, to today’s full-color LED large screen, all of which can reflect the dream and technology, trend and fashion concept.
At present, the outdoor LED electronic screen occupies 80% of the outdoor media advertising field, and has become a new carrier of large-scale outdoor media advertising. Wireless control LED electronic screen technology has come out. Now you can see some common wireless control LED large screen methods.
WiFi wireless control
How to operate: install a line less controller or other wireless devices, and bridge with the existing wireless network to build a wireless LAN, so that the network controller card can easily integrate and control the wireless network.
Function: no wiring, easy to install and debug, fast data transmission.
Disadvantages: the communication distance is mainly the gain function of the bridge, no line communication distance is short, the partition signal is weak or no signal. Suitable for places with short distance wireless signal. If the display area has a wireless signal cover, the LED electronic screen can be controlled by all computers in the internal network by connecting the wireless channel bridge connected to the control card to the wireless network.
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Radio frequency wireless control
Working principle: one side of the RF module is located on the control computer, the other side is located on the serial port of the control card. After the computer installs the driver, it creates a virtual serial port to transmit data through this serial port.
Function: easy to install and debug, data transmission distance up to 300-1000 meters, no need to use the cost.
Disadvantages: wireless band, the state does not allow civil use, this 433MHz deployment is vulnerable to signal interference, baud rate is not very low, baud rate can only use 4800 or 9600, not recommended.
GPRS wireless control
Working mode: after the GPRS module is powered on, the dial-up Internet connection process is completed and connected to the data center server. The client accesses the server through the client software and transmits information from the server. Features: convenient installation and debugging, no distance limit, the place with mobile phone signal can receive information, the price is relatively cheap.
Disadvantages: China Mobile needs to install GPRS module of mobile card with at least 5 yuan flow package and a certain monthly flow cost. Limited by the GPRS bandwidth, the transmission speed is a little slow. It is suitable for LED electronic screen with single or double color mainly playing text.
4G wireless control
Working mode: basically the same as 3G / GPRS.
Features: fast 4G transmission speed, complete real-time control, immediate response to relevant control commands
Disadvantages: if the amount of data transmitted is large, the traffic cost will be higher, so it is better to open the traffic packet.
3G (WCDMA) wireless control
Working principle: the 3G module is also connected to the data center server through the wireless network, the customer directly logs in to the global collaborative content cloud platform to publish the plan, and directly transmits it from the server to the control card.