1. RF wireless control: 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 computer installs the driver, a virtual serial port is generated and data is sent through this serial port. It has the characteristics of convenient installation and debugging, data transmission distance of up to 300-1000 meters, and no cost for later use. RF sending and receiving modules, about 350 yuan a pair, support one-to-many sending, that is, one sending module to multiple receiving modules. However, this method also has some shortcomings. There are not many radio frequency bands that the country allows for civilian use. This batch of 433MHZ is extremely susceptible to signal interference, and the transmission rate of this method is not very low, and the baud rate can only be used up to 4800. Or 9600, it is not recommended.

2. WIFI wireless control: By installing a wireless router or other wireless devices, bridge the user's original wireless network to build a wireless local area network, and it is convenient to integrate the network control card into the wireless network for wireless network control. This method has the characteristics of no wiring, convenient installation and debugging, and fast data transmission speed. Required equipment and price, network bridge, within 800 yuan; wireless router (applicable to the display screen is best to choose a device with a replaceable antenna, so that you can effectively receive wireless signals), the price is about 100 yuan. The disadvantage is that the communication distance mainly depends on the gain capability of the bridge, the communication distance of the wireless router is relatively short, and the signal of the partition wall is weak or no signal. It is suitable for places with wireless signals in short distances. If the area where your display is located already has wireless signal coverage, it is even simpler. You only need to bridge the wireless router connected to the control card in the display to your wireless network, and you can use any computer in the intranet The upper control LED display is up.

3. GPRS wireless control: After the GPRS module is powered on, it completes the process of dial-up Internet access and connects to the data center server. The client accesses the server through the client software, and the server forwards the information. It is characterized by easy installation and debugging, no distance limit, as long as there is a mobile phone signal, you can receive information, and the price is relatively cheap, generally in the range of 200-400 yuan. The disadvantage is that the GPRS module needs to install a mobile phone card for dial-up Internet access, which will incur a certain monthly traffic charge (such as China Mobile's minimum 5 yuan traffic package can meet the demand). Limited by the GPRS bandwidth, the transmission rate is slightly slower, so it is more suitable for single-color and dual-color LED displays that mainly play text.

4. 3G (WCDMA) wireless control: The 3G module is also connected to the data center server through a wireless network, and the customer directly logs on to the Global Unicast cloud platform to publish programs, which are directly sent to the control card by the server. The characteristic is that the WCDMA signal is stable, and there is basically no data loss during the program transmission process. Compared with GPRS, the rate is faster, and pictures or videos can be transmitted. It is more suitable for full-color LED displays. The disadvantage is that China Unicom's signal coverage is not as high as China Mobile, and it may not be possible to connect to the Internet in some remote areas.

5. 4G full Netcom wireless control: Basically the same as 3G/GPRS, the feature is 4G full Netcom (supported by all series of China Mobile, China Unicom, and China Telecom), fast transmission rate, fully realized real-time control, sending commands can instantly respond to related controls . The disadvantage is that when the amount of data sent is relatively large, the traffic cost is relatively large, and it is recommended to open a traffic package.

The above is the five methods of wireless control LED display summarized and analyzed by the editor of Lianchengfa. You can choose your own control method according to your actual situation.