Smart home appliances do not refer to a single home appliance, but should be a technical system. With the continuous development of human application requirements and smart home appliances, its content will be more abundant. The functions of smart home appliances will also vary depending on the actual application environment. The difference, but generally should have the communication function, intelligent control of consumer electronics, interactive intelligent control and other functions. Wireless communication technology has become the cornerstone of intelligent home appliances. Currently, there are several wireless technologies used in smart home appliances: zigbee technology, infrared technology, Bluetooth technology, Wi-Fi technology and radio frequency technology.
Wi-Fi technologySmart home appliances systems are mostly based on Wi-Fi wireless IoT technology to achieve intelligent control of home appliances. The main working principle is as follows: the program instruction is issued by the user's own mobile phone, and the system module in the home receives the information and performs appropriate processing on the information, and then the processing result is transmitted to the single chip through Wi-Fi, so that the single chip can do according to the information. The corresponding control command is executed 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 intelligent control of the home appliance, 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.
The application areas of Wi-Fi modules in smart home appliances include: entertainment video and audio services, telecommunication services, smart home services, interconnection of devices in the home, after-sales 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 through their networks. The home appliance manufacturer can track the use of the product based on the network environment according to the Wi-Fi module in the smart home appliance. Once the smart home appliance fails, the Wi-Fi module can automatically send information to the manufacturer, and the home appliance manufacturer according to the cause of the failure. Promptly develop treatment measures and proactively contact users to solve problems.
Zigbee technologyIn general, smart home appliance control systems using zigbee technology include zigbee coordinators, zigbee infrared control terminals, and home gateways. There are two functional modules in the zigbee network, one is the zigbee coordinator, which establishes and manages the zigbee network; the other is the zigbee terminal node, which mainly completes the joining of the zigbee network and the control of the learning infrared remote control module. The zigbee coordinator can interact with the home gateway through the RS232 serial port to realize the connection between the wireless control network and the control host.
The Bluetooth system is embedded in a microwave oven, a washing machine, a refrigerator, an air conditioner, and the like, which can be intelligent and have the function of a network information terminal, and can proactively publish, acquire, and process information, giving the traditional appliance a new connotation. With the development of Bluetooth, all Bluetooth information appliances can be controlled by a remote controller, and even useful information can be shared among these Bluetooth information appliances. The Bluetooth module is a module for wireless transmission using Bluetooth technology. The Bluetooth module communicates with the network environment externally, and the internal communication system plays a very important role in the smart home appliance system. The development process is also highly concerned by the industry. The demand for smart home appliances is growing, and the demand for Bluetooth modules is growing rapidly.
Infrared technology
In the past, for some traditional household appliances, the use of infrared transmission, such as various types of remote control, television, air conditioning and so on. But with the development of smart home appliances, from the refrigerator to the small socket, all the appliances seem to have been labeled with intelligence. Infrared technology is also a way to achieve intelligent upgrade of home appliances, mainly relying on wireless infrared transponders to complete.
The wireless infrared transponder is a built-in infrared and transceiver module. It has the function of learning and remembering infrared signals, and can learn and memorize the intelligent products of multiple infrared devices. It can connect the transceiver module, zigbee wireless signal and infrared wireless signal, and control any household equipment using infrared remote control, such as TV, air conditioner, washing machine, refrigerator, electric curtain, etc. through mobile intelligent terminal. Through the wireless infrared transponder, the user can remotely control multiple electrical devices by using the smart home application APP on any mobile phone, and realize the function of integrating multiple infrared remote controllers.
In addition, one of the great advantages of using infrared technology in smart home appliances is that it is stable because it uses analog transmission, not digital signal transmission, so almost no similar signals interfere with it. Infrared transmission technology has been widely used in smart homes and smart home appliances due to its mature technology, stability, privacy, and relatively low cost.
Radio frequency technologyUsually there are many electrical appliances in the home, refrigerators, air conditioners... Some of them have remote control capabilities, such as air conditioners, TVs, etc. Some do not have remote control functions, such as water heaters, microwave ovens, rice cookers, refrigerators, etc. Different remote control devices have different remote controls, which are not universal with each other. With products based on radio frequency technology, all the appliances in the home can be connected into a network.
The radio frequency technology includes RFID radio frequency tag, which is a non-contact automatic identification technology. It recognizes the target object and acquires relevant data through the radio frequency signal, and the identification work does not require manual intervention. As a wireless version of the barcode, the RFID technology has a barcode that is not available. Waterproof, anti-magnetic, high temperature resistance, long service life, large reading distance, data on the label can be encrypted, storage data capacity is larger, and storage information can be changed freely.
RFID radio tags are believed to be widely used in smart refrigerators, eventually replacing the bar codes that need to be used 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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