Baidu Encyclopedia's explanation for Zigbee is: "ZigBee is a low-power LAN protocol based on the IEEE802.15.4 standard. It is a short-range, low-power wireless communication technology. This name (also known as the Zigbee protocol) comes from bees. The splayed bee, because the bee is relying on flying and "zig" to shake the wings of the "dance" to convey the position information of the pollen with the companion, that is to say, the bee relies on this way to form the communication in the group. The internet."
ZigBee has always given the impression of an advanced technology and the best wireless communication technology in smart homes. This is related to the emergence of ZigBee at the beginning of the media. It is undeniable that people's longing for smart homes will never stop. Before the launch of ZigBee, the industry lacked reasonable smart home communication technology, and the emergence of ZigBee technology once again ignited people's good wishes for smart home. . In this context, people have great expectations for ZigBee technology, hoping to solve the communication between smart home devices, which gives people the impression of "advanced" ZigBee technology. It is undeniable that ZigBee has its advantages such as: Strong anti-interference ability, good confidentiality, fast transmission, strong scalability and so on. But is it really so perfect? In fact, each technology has its limitations, and ZigBee is no exception. Let's talk about some misunderstandings about ZigBee.
Is the cost really low?
At present, the ZIGBEE chip shipments of TI's CC2430, CC2530 and Freescale's MC1319X, MC1322X series, the cost is about 2 to 3 US dollars, and considering other peripheral devices and related 2.4G RF devices, BOM cost is difficult to low. For $10, the cost-sensitive home appliances that require a large number of nodes for smart homes are costly.
Is communication really stable?
At present, the domestic Zigbee technology mainly uses the 2.4G frequency in the ISM band, which is limited by the physical limitation of the frequency band. The signal interference degree is extremely serious, the diffraction ability is weak, and the wall penetration capability is also weak. In the actual environment, a wall and a door will also greatly reduce the signal. It is easy to cause instability and affect the user experience.
Is networking really easy?
The main features of Zigbee technology are strong self-organizing network and strong self-recovery ability. Therefore, it is very attractive for downhole positioning, parking space location, outdoor temperature and humidity collection, and pollution collection. However, for the smart home application scenario, once the position of the switch, socket, and curtain is fixed, it will remain unchanged, and the advantages of the self-organizing network will no longer exist, but the time and resources consumed by the self-organizing network are still high.
Is the networking capacity really useful?
Although ZigBee supports up to 65,000 nodes, in the actual home environment, it will never be used so much. For example, for a villa, all the switch socket curtain controls will add up to no more than 100. More, it will also exceed the limits that users can use. Therefore, the huge network capacity does not necessarily bring value to smart home applications.
Is ZigBee the future?
It should be said that the unification of smart home communication standards still takes time. Now all communication technologies should have no advantages and disadvantages. They each have their own advantages and disadvantages and are suitable for use in different life scenarios. For example, NFC has been criticized for a very short transmission distance, but it is because of this technical feature that it is suitable for use in close-range authorization scenarios such as door locks. Therefore, the technology itself has no advantages and disadvantages, but it is not suitable. According to the actual situation of the home environment, it is the most sensible idea to choose different technologies.
Summary: ZigBee has been in existence for 12 years since its birth. The reason why it did not complete the original smart home standard is that it has its inherent reasons, one of which is the limitation of technology itself. In fact, as consumers, we should not fall into the strange circle of technology. The best technology does not represent the best experience. As long as it meets the actual needs, don't care about the technology, and use it with confidence.
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