OFweek smart home network news: smart appliances do not refer to a single appliance, but should be a technical system, with the continuous development of human application needs and intelligent home appliances, its content will be more abundant, according to the actual application of different intelligence The function of household appliances will also be different, but generally should have the function of communication, intelligent control of consumer electronics, interactive intelligent control and other functions. The wireless communication technology has become the cornerstone of intelligent household appliances. Currently, there are several basic wireless technologies used in smart home appliances: zigbee technology, infrared technology, Bluetooth technology, Wi-Fi technology, and radio frequency technology.
Wi-Fi technology
Most smart home systems are based on Wi-Fi wireless Internet of Things technology to achieve intelligent control of home appliances. Its main working principle is: through the user's own mobile phone to send program instructions, the system module at home to receive the information after the appropriate processing of information, and then pass the results of the processing to the microcontroller through Wi-Fi, so that the microcontroller can be based on information to do A corresponding control instruction is issued to complete the control command issued by the user, and the final processing result is also fed back to the client. The function that the client needs to complete is mainly the home appliance intelligent control, that is, the client sends control information to the server through the Wi-Fi network, and then the server returns the information to the client.
Applications of Wi-Fi modules in smart home appliances include entertainment video and audio services, telecommunications services, smart home services, interconnection of various devices in the home, after-sale tracking of home appliances, multimedia sharing, and remote control of information appliances. For example, users can remotely control smart home appliances such as rice cookers, air conditioners, microwave ovens, temperature and humidity regulators, and washing machines at home through the Internet. Appliance manufacturers can follow the Wi-Fi module in the smart home appliance to track the use of the product based on the network environment. Once the smart home appliance fails, the Wi-Fi module can automatically send information to the manufacturer. Timely development of measures to deal with, and take the initiative to contact the user to solve the problem.
Zigbee technology
In general, the smart home appliance control system adopting zigbee technology includes a zigbee coordinator, a zigbee infrared control terminal, and a home gateway. Zigbee network has two functional modules, one is zigbee coordinator, to establish and manage the zigbee network; the other is zigbee terminal node, mainly to complete the zigbee network to join and control of learning infrared remote control module. The zigbee coordinator can exchange data with the home gateway through the RS232 serial port to realize the connection between the wireless control network and the control host.
Bluetooth
The Bluetooth system is embedded in traditional household appliances such as microwave ovens, washing machines, refrigerators, and air conditioners, which can be intelligentized and have the functions of a network information terminal, can actively publish, acquire and process information, and give traditional appliances a new meaning. With the development of Bluetooth, all Bluetooth information appliances can be controlled through a remote controller, and even useful information can be shared among these Bluetooth information appliances. The Bluetooth module is a module that uses wireless Bluetooth technology for Bluetooth transmission. The Bluetooth module communicates with the network environment externally, contacts the operating system internally, and plays a very important role in the smart home appliance system. Its development process is also highly concerned by the industry. The market demand for smart appliances continues to grow, and the market demand for Bluetooth modules is also rapidly increasing.
Infrared technology
In the past, for some traditional household appliances, basically infrared transmissions were used, such as various types of remote controls, televisions, and air conditioners. But with the development of smart appliances, from refrigerators to sockets, all appliances appear to have been labeled with smart labels. Infrared technology is also a way to achieve smart home appliances upgrades, mainly rely on wireless infrared transponders to complete.
Wireless infrared transponder is a built-in infrared and transceiver module, with infrared signal learning and memory function, can learn, memory intelligent devices of multiple infrared devices. It can associate the transceiver module and the zigbee wireless signal with the infrared wireless signal, and control any household device using an infrared remote control such as a television, an air conditioner, a washing machine, a refrigerator, an electric curtain and the like through the mobile intelligent terminal. Through the wireless infrared transponder, the user can use any smart home application APP on the mobile phone to remotely control a plurality of electronic devices and achieve a combination of multiple infrared remote controller functions.
In addition, one of the advantages of using infrared technology in smart home appliances is good stability, because the analog transmission method is used, and digital signals are not used for transmission, so there is almost no similar signal to interfere with it. Infrared transmission technology is widely used in smart homes and smart home appliances due to its mature technology, stability, privacy, and relatively low cost.
Radio frequency technology
Usually there are many household electrical appliances, refrigerators, air conditioners, etc. Some of them have their own remote control capabilities, such as air conditioning, television, and some do not have remote control functions, such as water heaters, microwave ovens, rice cookers, refrigerators and so on. Different remote control devices are equipped with different remote controllers, which are not universally usable. Using products based on wireless radio frequency technology, all appliances in the home can be strung together into one network.
Radio frequency technology includes RFID radio frequency tags. It is a non-contact automatic identification technology. It recognizes target objects and obtains related data through radio frequency signals. The recognition work requires no manual intervention. As a bar code wireless version, RFID technology does not have a bar code. Waterproof, anti-magnetic, high-temperature resistant, long service life, large read distance, data on the label can be encrypted, storage data capacity is greater, storage information changes freely and so on.
RFID radio tags are believed to be widely used in smart refrigerators, eventually replacing bar codes that are needed today. Each RFID tag represents a unique number for each product, rather than a bar code tracking product as a whole. The processing data can be connected via a network via an RFID reader to determine the product name, manufacturer, expiration date and all other relevant project information.
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