Why can different smart home devices in the home work in the same environment because there is Wi-Fi? If there is no Wi-Fi outside, why can you still see the situation at home? In the process of interviewing smart home businesses, I heard the names of various agreements. The agreements are used to do something. Why should we understand them? Let's take a look at several criteria for smart home technology today.
Four kinds of smart home technology standards
The smart home technology standards that we know are most familiar with Wi-Fi and Bluetooth. But in fact, in addition to Wi-Fi and Bluetooth, there are two smart home technology standards that are currently applied, one is Z-wave and the other is Zigbee. Come to meet each other first.
　　 1. Z-wave: Short-range wireless communication technology
According to the definition of Baidu Encyclopedia, Z-Wave is a wireless networking specification dominated by Danish company Zensys. It is an emerging radio frequency-based, low-cost, low-power, high-reliability, short-range wireless communication technology suitable for networks.
Since it is a short-range wireless communication technology, it should be suitable for home. Therefore, it is used in residential, lighting commercial control and status reading applications such as meter reading, lighting and home appliance control, HVAC, access control, anti-theft and fire detection.
In addition, it can convert any independent device into a smart network device, enabling control and wireless monitoring. Therefore, when it was originally designed, it was positioned in the field of smart home wireless control. In other words, it is for wireless control of smart homes.
As for the technical control of how it is implemented, to give a small example, a small home with three bedrooms and one living room, three lighting control switches, three wall switches, a remote control, and a touch control screen. All devices are guaranteed to be connected, then you can see the switch status of all Z-Wave appliances in your home through the remote control and touch control screen, and you can easily control it.
2, Zigbee: Wireless network protocol for low-speed short-distance transmission
According to the definition of Baidu Encyclopedia, ZigBee is a low-power LAN protocol based on the IEEE 802.15.4 standard. “bee†is the meaning of a bee, and “zig†is the “click†sound of a bee moving wings. Therefore, it is also called the Zigbee agreement. Bees rely on this way to form a communication network in the group.
ZigBee is characterized by close range, low complexity, self-organization, low power consumption, and low data rate. It is mainly suitable for the fields of automatic control and remote control and can be embedded in various devices. In other words, it is a wireless network protocol for low-speed short-distance transmission.
As for Z-wave and Zigbee, which is better, it is said on the Internet that Z-Wave aims at home automation applications at the beginning of its establishment, while ZigBee pursues a wider range of applications. Therefore, the original guiding principles of the two are not the same. They also have their own advantages and disadvantages. As for the choice of which technology to use as the basis for its own products, it is up to the company itself to decide.
3, Allseen: Internet of Things Alliance
When it comes to Allseen, it should be the Allseen Alliance. An IoT alliance made up of companies such as the Linux Foundation, Qualcomm, LG, Sharp, Haier, Panasonic, HTC, Silicon Image, TP-Link, and Cisco.
The original framework of the AllSeen Alliance was derived from the AllJoyn open source project, which was mainly driven by the Qualcomm Innovation Center. It later involved processor vendors, network infrastructure vendors, router vendors, and home terminal vendors. Enterprises joining the alliance hope to be able to communicate with each other.
In September 2014, the chairman of the AllSeen Alliance reported on the work of the Alliance: it has nine important members and 42 community members; it is actively implementing additional features and improvements, such as security and lighting; both versions of AllJoyn have Released, including the SDK; AllJoyn projects can be extended to all HLOS platforms, from Android to IOS to Linux, OpenWRT, Windows, and even embedded RTOS solutions with extremely limited memory and processing power.
It can be seen from the work process that the Allseen Alliance is trying to bring an open platform to everyone, at least within the members, to make the code open, so that the products between members can be integrated into the technical standards.
4, Thread: Google led the alliance
After Google acquired Nest, it was led by Nest and members including ARM, Silicon Labs, Freescale, and Samsung's industry group ThreadGroup announced the 1.0 version of the Thread specification. Thread is actually a league standard for another group of companies. At the time of publication, everyone believed that "the standards of the Internet of Things will be unified."
Why do you say that? Because Thread has several advantages:
1. Advantages of the Thread protocol: Support IPv6 through 6LoWPAN technology, improve the disadvantage that Bluetooth does not support IPv6, and ZigBee cabling is complicated.
2. Thread's openness: Focusing on the design of a networking layer that allows a wide range of Internet of Things solutions to interoperate, it is also seeking broader opportunities for collaboration.
3. Charisma and influence: From the initial 7 to the current 160, even Qualcomm has joined the board of directors.
Of course, for Thread, there is obviously a mark of Google, which means that like Android, it represents a standard of attributes. Because there are windows and IOS systems, whether they are willing to enter the system, apparently have not seen any signs.
Why should we understand the smart home technology standards?
Many people in the home industry have to ask, these technical standards seem to be dry, why should we understand the technical standards of smart home? This does not seem to bring any benefits for their own products.
1, Internet of Things needs technical standards support
First of all, it is necessary to make it clear that if you want to achieve smart home, you need to connect objects and things, like going out, timing the rice cooker, the door automatically opens, the lights automatically opened, the rice is cooked. There is a connection between these different devices. As long as the connection is achieved, there needs to be a technical standard to support it. Whether it is Z-wave, Zigbee, or Allseen and Thread, all need a standard to implement.
2, with technical standards to ensure the stability of smart home systems
Without this uniform standard, smart home systems are more difficult to achieve full stability. Just like now, if we buy products with different technical standards, we will find that it is not easy to use when it is used. This is the problem. Of course, if we can achieve complete unification, it will obviously be more conducive to our use environment.
3, smart products do not exist in isolation, but also need this technical standard
Some people may ask, what is the relationship between smart home products and these technologies? Is smart sofas and smart toilets still required this technical standard? If you want users to control smart sofas and smart toilets from one device, you really need to This technical standard. In other words, do not think that the product is just a single product, as long as the user manually use it, as long as the entire system in the smart home, the product is not isolated.
What do we need to do?
It is clear that we also need technical standards, then what needs to be done:
1, clearly what kind of technical standards to do the product
When developing smart home products, you need to consider what kind of technical standards to use to make products. Some use Z-wave, some use Zigbee, or use Thread in the future. Currently, smart home products manufactured using these technical standards are mainly concentrated in lighting, control systems, and smart single products. The actual use of traditional household items has not yet been seen, which also indicates that the traditional household items may be developed. .
2. Keeping Focus on New Technology Standards
In addition, there is a need to maintain a focus on new technology standards. Perhaps the technical standards have not yet been used, but it does not mean that the products we will develop in the future will not be used. Maybe in the near future, the standards of the Internet of Things will be truly unified, so we will use the uniform standards directly to build our own products. .
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