The best application range of ZigBee technology is in wireless sensor networks, such as hydrological monitoring, pollution monitoring and other scenarios. These application scenarios often require multiple power-saving self-organizing networks to transmit data between each other for easy maintenance and expansion. This year, many manufacturers at home and abroad have applied Zigbee technology to the scene of smart home . Below, we will look at the advantages and disadvantages of Zigbee technology in smart home.
Introduction to ZIGBEE Technology
Zigbee is based on IEEE802.15.4 communication protocol, IEEE802.15.4 handles low-level MAC layer and physical layer protocol, and Zigbee protocol standardizes network layer and API. The Zigbee full protocol is used for 4K bytes of a base node that can be directly connected to a device or 32K bytes as a coordinator of a Hub or router. Each coordinator can connect up to 255 nodes, while several coordinators can form a network, and there is no limit to the number of route transfers.
Zigbee is an emerging short-range (10m to 100m), low-rate (250Kbps nominal rate), low-power wireless network technology, mainly used for short-range wireless connections. Low complexity, low power consumption, low speed, low cost, self-organizing network, high reliability, and over-the-horizon. It is mainly suitable for applications such as automatic control and remote control, and can be embedded in various devices. In short, ZigBee is a cheap, low-power, ad hoc network of short-range wireless communication technology.
ZIGBEE's advantages in smart home
The application of Zigbee technology in smart home has the following advantages.
Strong anti-interference ability: Zigbee transceiver module uses 2.4G direct sequence spread spectrum technology, which has better anti-interference ability than general FSK, ASK and frequency hopping digital radio.
Good confidentiality: ZigBee provides data integrity check and authentication. The encryption algorithm uses the universal AES-128, and the 128-bit password provides guarantee for the confidentiality of ZIGBEE signal transmission.
Fast transmission speed: ZIGBEE transmits data in short frames, so the transmission speed is fast and the real-time performance is strong.
Strong scalability: ZIGBEE networking is easy and self-recovery, so it is easy to expand in smart homes and add new equipment.
Looks beautiful
However, we must realize that many of ZIGBEE's features are implemented in the smart home application scenario, and it becomes a beautiful look:
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 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.
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