The smart home cable solution has the advantages of reliability and performance, and has the disadvantages of complicated wiring, high cost, and poor convenience. At present, in the European and American markets, wireless technology has gradually occupied the mainstream of smart homes.
RF radio frequency technology is a short-range, low-complexity, low-power, low-data-rate, low-cost wireless communication technology. The advantage of this technology is that some products do not need to be re-routed, using point-to-point RF technology to achieve control of home appliances and lighting, installation and setup are more convenient, mainly used to achieve control of certain appliances or lights, the cost is moderate. This type of system has weak functions, a relatively simple control method, and is susceptible to interference and shielding from surrounding wireless equipment environments, especially the same frequency and obstruction. It is more suitable for newly renovated households and renovated households.
Bluetooth technology was originally created by Ericsson. On May 20, 1999, industry leaders such as Sony Ericsson, IBM, Intel, Nokia and Toshiba established the Bluetooth Special Interest Group to develop Bluetooth technology standards. Bluetooth is a new type of wireless transport protocol for wirelessly connecting between different devices, such as connecting computers and peripherals.
Bluetooth provides point-to-point or point-to-multipoint wireless links based on the concept of the network. The status of all devices is equal within any valid communication range. The device that first proposes the communication request is called the master device, and the device that communicates passively is called the slave device (Slaver). With Time Division Multiple Access (TDMA), a master can communicate with up to seven slaves simultaneously and with multiple slaves (up to 200) but not. A network of one master device and more than one slave device is called a piconet of Bluetooth.
If there is communication between devices between two or more piconets, a Bluetooth distributed network (Scatternet) is formed. Based on the principle of TDMA and the equality of Bluetooth devices, any Bluetooth device can be used as both a master device and a slave device in the network. Therefore, it is a typical non-central network with a natural and flexible networking. The Bluetooth network has Adhoc features, and each device can easily enter and leave the network without additional network configuration. Just to complete the appropriate network functions, there must be some initial configuration work.
Although Bluetooth technology is currently a more advanced wireless network technology, and has been gradually popularized in many devices for interoperability, for many consumer electronic devices, it is used as an alternative to cable, in terms of cost and power consumption. Hard to satisfy.
Zigbee is currently the fastest growing and most widely used wireless transmission technology in the smart home field. It features short range, low complexity, low power consumption, low data rate, and low cost. It is mainly used in the field of automatic control and remote control, and can meet the wireless networking and control functions for small and inexpensive devices.
For home network communication, the amount of data transmitted is small, and the transmission rate does not require too high a requirement. The capacity of the network is large, and there are many kinds of electrical equipment in the home. The information has good real-time performance, short delay and low cost. ZigBee Compared with the existing wireless communication technologies, Zigbee technology is one of the lowest power consumption and lowest cost technologies, which satisfies the needs of smart homes.
Wi-Fi is a technology that can wirelessly connect terminals such as personal computers and handheld devices (such as PDAs and mobile phones). Wi-Fi is a wireless network communication technology brand owned by the Wi-Fi Alliance (Wi-Fi Alliance) to improve interoperability between wireless network products based on the IEEE 802.11 standard.
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