The ZigBee protocol affects the nerves of the global IoT industry and deeply affects the development of smart homes. This is beyond doubt. Unifying the market-leading wireless standard ZigBee into ZigBee 3.0, announced that ZigBee's ZigBee Cluster Library (ZCL) will be implemented on the Thread network architecture, and Samsung's smart home platform brand SmartThings will be included as a member of the ZigBee Alliance Board of Directors. All of them caused strong repercussions.
From a public perspective, WiFi and Bluetooth are almost all well-known and well-known vocabulary, and are widely used in various electronic products. In comparison, ZigBee's popularity is not the same. But why does ZigBee have more influence in the smart home field?
ZigBee, also known as the Purple Bee Protocol, is a short-distance, low-power wireless communication protocol based on IEEE802.15.4. It is suitable for building automation equipment, such as smart bulbs and smart door locks. , motion sensors, environmental sensors, etc. As an emerging wireless technology, ZigBee's first official standard was released in 2004. It is not too early, but it has been adopted by many world-renowned companies based on its own advantages and external factors. So who is using the ZigBee protocol?
On the international ZigBee Alliance official website, one sentence is very eye-catching: ZigBee may already be in your home (ZigBee may already exist in your home). This is not a false statement, see which companies have used the ZigBee protocol to understand.
- Bosch, one of Germany's largest industrial companies, engaged in automotive technology, industrial technology and consumer goods and construction technology industries; Comcast, a major US cable TV, broadband network and IP telephony service provider, with 24.6 million cable TV users, 14.4 million broadband network users and 5.6 million IP phone users; Logitech, the world's most famous computer peripheral equipment supplier, 55% of the 900 million personal desktop computers produced worldwide are equipped with Logitech mouse; Osram, the world's two One of the light source manufacturers, headquartered in Munich, Germany, the products are widely used in public places, offices, factories, homes and automotive lighting; Samsung, LG, General Electric, Philips, Mitsubishi, Siemens, Sony, Panasonic, etc. Explanation.
——China, Huawei, ZTE, Xiaomi, IOT Sensing, Xing Electronics, Wuhan Endjin Power, Beijing Ols Technology, Chengdu Baiwei Electronics, Furui Electronics, Shunzhou Technology and other companies have used to varying degrees The ZigBee protocol, part of the technology companies and even the loyal fans of the ZigBee protocol, has contributed a lot to the promotion and promotion of the ZigBee protocol in China.
Why is ZigBee? The main intent is in smart homes and the Internet of Things.
Analysts at Gartner, an information technology research and analysis firm, predict that by 2020, the number of connected devices will increase from 900 million in 2009 to 26 billion. The previous "dumb" products will become smart products that can communicate with each other. . Market research firm IDC also believes that the value of the "Internet of Things" market in 2020 is expected to reach 3.04 trillion US dollars. The market research firm IHS Technology reports that the smart home market will show a compound annual growth rate of 56% in the next three years, and there will be up to 190 million product shipments in the market by 2018.
However, the problem now is that WiFi, Bluetooth, Z-Wave, etc. are equally suitable for smart homes and the Internet of Things, and have certain adoption. Why is the ZigBee protocol only a favorite in the smart home field?
{ZigBee is the communication protocol of the intelligent home control system popular in recent years. It has the following advantages compared with other communication protocols:
1) Ultra-low power consumption: In the low power consumption and low power mode, the ZigBee protocol can guarantee at least 2 years of service life or even longer;
2) High security: ZigBee provides a three-level security mode, including no security settings, access control list (ACL) to prevent illegal access to data, and symmetric passwords using the Advanced Encryption Standard (AES 128) for flexibility. Determine their security attributes to ensure the security of your home ZigBee network;
3) Self-organizing network, which can accommodate many sub-devices: The ZigBee network of the gateway can theoretically add 65,535 sub-devices. Compared with the number of digits in Bluetooth, ZigBee has obvious advantages, and is more suitable for multiple devices in smart homes. Into the network. }
The above is the answer to why the Xiaomi smart home eco-chain company Green Rice Smart Home Set chooses the ZigBee protocol. Simply put, the meaning is that the ZigBee protocol has low power consumption, is very secure, and can connect many devices in series, which is more in line with the communication requirements of the smart home system, reliable and guaranteed, and other protocols have more or less problems.
Nowadays, more and more enterprises are adopting the ZigBee protocol. Is it necessary that products using the ZigBee protocol are superior to products adopting other protocols? In theory, this is true, but it does not rule out the problem of equipment caused by the “scraping and reducing materials†of some enterprises. In other words, who can adopt the ZigBee protocol, but it is not easy to do a smart home based on the ZigBee protocol, especially the security issue.
A, ZigBee's biggest problem is that the development threshold is high, there is no certain technical strength, it is difficult to perfect. Last year, the domestic Internet of Things leader, IoT Sensing, and the ZigBee Alliance were in conflict. At that time, IOT Sensing suspected that small companies were stalking. When responding, the M&A Director of IoT Sensing Media, Ms. Zhang said that she was a small company. The trick is not Care, "ZigBee entry is easy to master, the source code is 400,000 lines, it takes two years to read it once, not a small manufacturer can get it...".
B, ZigBee security is indeed stronger than other protocols, but it is not easy to make device security issues. According to industry insiders, in the general security level of ZigBee, there is a key of the trust center and a network key when actually transmitting data on the network. In the end, if you want to crack the ZigBee network, you must obtain the latter 16-byte strong password network key. ZigBee's AES128 encryption algorithm makes brute force hacking impossible. However, if the vendor's technology is not in place or not, the ZigBee-based device may still have security holes.
At the recent 2015 Black Hat Conference (BlackHat2015), ZigBee devices were exposed to serious security vulnerabilities, and the main reason was not the design problem of the ZigBee protocol standard itself. "The root cause of the vulnerability is more pointed out because the manufacturer is producing Ease of use, devices that work seamlessly with other networked devices, while minimizing equipment costs, regardless of the security considerations required at the security level."
"Even if you adopt the ZigBee protocol, you can't say that the level is the same. There is also a difference. For example, in terms of security, the system of IoT sensing is a self-contained system, and the key of the trust center is not publicly available, and the actual communication. The network key is randomly generated, and each network is different. The self-innovated method of dynamically switching the network key can make the network key dynamically update as needed, so there is basically no security risk. However, if some vendors have random protocols Abuse, ignoring security enhancements, regardless of the protocol, their devices will be cracked by malicious attackers,†said Dr. Sun, senior security expert at IOT.
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