Several commonly used wireless control LED display modes Shenzhen caishida
Author:Wu Haibo Time:2021-07-19 14:40 Browse(569)
Several commonly used wireless control LED display modes - Shenzhen caishida, touch screen and OLED Forum
1、 Working principle of 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, it generates a virtual serial port and sends data through this serial port.
features: convenient installation and debugging.
the data transmission distance can reach 300-1000 meters, and there is no cost for later use.

Several commonly used wireless control LED display modes Shenzhen caishida

required equipment and price: RF sending, data transmission, data transmission and data transmission Receiving module.
about 350 yuan per pair.
it supports one to many transmission.
that is, one transmission module to multiple receiving modules.
disadvantages: the frequency band of radio frequency is limited. The batch of 433MHz is extremely vulnerable to signal interference, and the transmission rate is not very low. The baud rate can only be used for 4800 or 9600, so it is not recommended Working principle of WiFi wireless control: by installing a wireless router or other wireless devices.
bridge with the user's original wireless network, build a wireless LAN, and easily integrate the network control card into the wireless network for wireless network control.
features: no wiring.
convenient installation and debugging, Fast data transmission speed.
required equipment and price: bridge.
within 800 yuan; The price of wireless router is about 100 yuan. The communication distance mainly depends on the gain ability of the bridge. The communication distance of wireless router is relatively short, The partition wall signal is weak or no signal.
it is suitable for places with wireless signal in a short distance.
if the area where your display screen is located is already covered by wireless signal.
it is even simpler. You only need to bridge the wireless router connected with the control card in the display screen to your wireless network, and then you can control the display screen on any computer in the intranet.
in this way, you can control the display screen on any computer in the intranet3、 Working principle of GPRS wireless control: GPRS module completes the process of dial-up Internet access after power on.
connect to the data center server, and the client accesses the server through the client software, and the server forwards the information.
features: convenient installation and debugging.
there is no distance limit, only the place with mobile phone signal can receive information, and the price is relatively cheap, Generally in the range of 200-400 yuan.
disadvantages: the GPRS module needs to install a mobile phone card to dial up the Internet.
a certain amount of traffic fee will be generated every month (for example, the minimum 5 yuan traffic package of China Mobile can meet the demand).
limited by the GPRS bandwidth.
the transmission rate is slightly slow, so it is more suitable for single and double color LED display screen mainly playing text.
4 Working principle of 3G (WCDMA) wireless control: 3G module is also connected to the data center server through the wireless network.
customers directly log in to the global network cloud platform to publish programs, which are sent directly to the control card by the server.
features: WCDMA signal is stable.
in the process of program transmission, there is basically no data loss, which is faster than GPRS, It can transmit pictures or videos, which is more suitable for full-color screen.
disadvantages: Unicom's signal coverage is not as high as that of China Mobile.
in some remote areas, it may be unable to connect to the Internet.
5. 4G all Netcom wireless control working principle: basically the same as 3G / GPRS.
features: 4G all Netcom (China Mobile, China Unicom China Telecom full series support).
the transmission rate is fast, the real-time control is fully realized, and the sending instructions can respond to the relevant control instantaneously.
disadvantages: when the amount of data sent is relatively large.
the traffic cost is relatively large, so it is recommended to open the traffic package/ r6 p4 c3 B5 l.
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