The core of intelligent products is wireless technology, which can realize the connection of smart devices with a home network and control them anytime and anywhere. With the development of the intelligent system, home intelligence is becoming more and more mature. However, many people still do not know much about the home automation control technology of smart home. This article will introduce the relevant control technology to have a more comprehensive understanding of smart home.
Wi-Fi Internet access can be understood as wireless Internet access. Almost all smartphones, tablet computers and notebook computers support Wi-Fi Internet access, one of the most widely used wireless network transmission technologies today. The principle is to convert wired network signals into wireless signals and then provide the relevant signals to computers, cell phones, tablets, etc. Wi-Fi Internet access is now very common, and its biggest advantage is that the transmission speed is very fast, up to 54Mbps, in line with the needs of personal and social information. In addition to fast transmission speed, the main advantage of Wi-Fi is that it does not require wiring and can be used regardless of wiring conditions, making it ideal for mobile business users. Wi-Fi LED Controller, for example, can be directly connected to LED strip lights without the need for wiring. Through the Wi-Fi signal, the smartphone can directly control the LED Strip light Controller.
Wi-Fi wireless network has many advantages compared to the wired network
In the smart home system, besides reducing the trouble of wiring, the biggest advantage is that it can seamlessly connect the connected home devices to the network without considering signal transition. At the same time, compared to other wireless communication technologies. Wi-Fi is low cost, low development, fast transmission rate, wide wireless coverage, high penetration, high mobility, etc. It means that Wi-Fi technology is very suitable for the smart home field. A smartphone can control smart light bulbs.
No wiring required
The main advantage of Wi-Fi is that it does not require wiring and can be used regardless of wiring conditions. Therefore, it is very suitable for mobile business users and has a very broad market prospect. Wi-Fi wireless networks have expanded from the traditional healthcare, inventory control and managed services industries to a wider range of industries and have even begun to enter the home and educational institutions.
Safety and Health
Wi-Fi wireless networks are relatively safe because they do not directly contact people in the same way as cell phones. Especially under the epidemic, people keep social distance from each other and intelligent products play an essential role.
Easy to set up
The essential equipment for setting up a wireless network is a wireless network card and an AP so that the network resources can be shared in a wireless mode with the existing wired architecture, and the cost and complexity of setting up are much lower than the traditional wired network.
Long Distance Operation
Although the working distance of wireless Wi-Fi is not large, the actual working distance of 802.11b can reach more than 100 meters with complete network construction. It solves the problem of error correction and error code of data when moving at high speed. The switching and security authentication between W-iFi device and device, device and base station are well solved.
Users can quickly achieve intelligent video intercom and intelligent control of various home appliances. At the same time, after the Web network control of smart gates, remote control of home appliances can also be realized. In addition to the above applications, Wi-Fi wireless smart gateway also has a cell mall management application function. Through the cell management software, property managers can browse various information through the gateway. Meanwhile, it also includes security alarm, information release, remote monitoring, equipment self-check and remote maintenance applications.
Bluetooth technology began with the telecommunications giant Ericsson’s 1994 program, then as an alternative to RS232 data lines, mainly to study the cell phone and other low-cost, low-power wireless communication between the connection method. By 1998, Ericsson wanted to standardize wireless communication technology and named it “Bluetooth”.
Bluetooth has been updated in several versions
Bluetooth version 1.1 and 1.2
This is the earliest version. The transmission rate of both versions is only 748 ~ 810kbps because of the earlier design, so the communication quality is not good but also vulnerable to interference from the same frequency products.
Bluetooth 2.0+EDR version
Bluetooth 2.0+EDR version was launched so that the usefulness of Bluetooth has been greatly improved. The transmission rate reached 21Mbps, compared with 1.2, increased three times, support for stereo sound, and duplex mode of operation. While voice communication, It also can transmit high-quality pictures. Although the 2.0+EDR standard in the technology has been greatly improved from the 1.x standard Although the 2.0+EDR standard has made significant technical improvements, the complex configuration process and high power consumption of the devices inherited from the 1.x standard still exists.
Bluetooth 2.1+EDR version
With the introduction of the Bluetooth 2.1+EDR version, the Sniff power-saving function was added to save power by setting the interval between two devices to confirm each other’s signals. With this technology, the standby time of Bluetooth 2.1+EDR can be extended by more than 5 times, resulting in a more power-saving effect.
Bluetooth version 3.0
With the introduction of Bluetooth version 3.0, the data transfer rate has been increased by about 24Mbps, and the Wi-Fi function can be invoked to achieve high-speed data transfer.
Bluetooth version 4.0
With the Bluetooth 4.0 version launch, Bluetooth 4.0 technology has been applied to the latest products such as iPhone 5, New iPad, Macbook Pro, etc. It has achieved a transmission distance of up to 100 meters with lower power consumption and low latency of 3 milliseconds.
Compared with Wi-Fi, Bluetooth is a little weaker, but in fact, Bluetooth is a very common and important way of communication in life and is also the main communication technology for the wireless smart home. Among all wireless technologies, Bluetooth has taken a big step forward in the smart home.
Recently, cell phones, computers, headphones, speakers, cars, medical devices, etc., have integrated the technology. At the same time, some home devices have also joined the cloud system, such as Bluetooth smart lights, LED strip Bluetooth controller, etc. Based on Bluetooth technology designed to make data acquisition and home security monitoring more flexible, but also to a certain extent to improve the system’s anti-interference ability.
At present, Bluetooth in smart home applications is gradually strengthening because of the ubiquity of Bluetooth because every smartphone has a Bluetooth device, which makes it almost everywhere. At the same time, due to Bluetooth’s low power consumption, some future automated devices will utilize Bluetooth wireless communication technology that can last for months or years.
Therefore, Bluetooth technology has a greater advantage over other technologies in this regard. The biggest benefit is that the performance of Bluetooth is constantly improving: the new generation of Bluetooth technology is using a mesh network, so that by connecting to nearby Bluetooth wireless devices, a Bluetooth radiates over a wider range, assuming that several Bluetooth smart bulbs are installed in a home, the wireless network can be used throughout the house. Such as Bluetooth networking controller can control up to 64 devices at the same time.
In recent years, with smart home short-range wireless technology development, the opportunity brought by home intelligence is becoming a reality. Among the various short-range wireless communication technologies that have emerged, Z-Wave is a strong competitor to other wireless communication technologies because of its simple structure, low cost and sensitive reception.
Z-Wave technology was initially designed to be used in the field of home automation wireless control. Z-Wave converts any standalone device into an intelligently networked device for control and wireless monitoring. Compared to other wireless technologies in its class, Z-Wave technology is designed explicitly for narrowband applications. It uses innovative software solutions instead of costly hardware to build a high-quality wireless network at a fraction of the cost of other similar technologies. In addition, Z-Wave also has relatively low transmission frequency, rather long transmission distance and certain price advantages.
Z-Wave technology is currently designed for control, monitoring and status reading applications such as meter reading, lighting and appliance control, HVAC, access control, burglary and fire detection. Z-Wave technology products include lighting control, curtain control, energy monitoring and status reading applications, entertainment, and audio/video home appliance control. It can be said that Z-Wave technology covers all aspects of people’s home life.
In recent years, ZigBee technology has been widely used in home automation, and the technology has many advantages in the smart home.
At present, ZigBee technology has started to be popular in lighting control, and besides lighting, ZigBee is gradually playing an essential role in other areas of the smart home. Although ZigBee technology plays various advantages in some fields of smart home, the close transmission distance, self-assembling network and huge network capacity have become ornaments, which also restrict the application and promotion of ZigBee technology in the home automation system. By flexibly using the advantages of ZigBee technology and overcoming its disadvantages, we can provide a cost-effective and reliable intelligent home system more effectively.
The advantages of Zigbee are as follows.
Strong anti-interference power
ZigBee transceiver module adopts 2.4GHz direct sequence spread spectrum technology, which has better interference capability than the general FSK, ASK and frequency hopping digital radio.
ZigBee can provide data integrity check and identity verification function, and its encryption algorithm adopts the common AES-128, and the 128-bit long password provides the guarantee of confidentiality of ZigBee signal transmission.
Fast transmission speed
ZigBee data transmission mainly adopts short frame transmission mode, so the transmission speed of ZigBee is fast and real-time.
Because ZigBee is easy to assemble network and has a strong self-recovery ability, ZigBee can expand and add new devices in the smart home.
The rapid development of technology has driven the rapid growth of the smart home industry, which is conducive to improving the wisdom of the whole smart home control system, making the entire system more stable and the transmission rate faster.
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