Smart Home System Design Scheme

Smart home systems need the support of advanced information technology, and the development of Internet of Things technology has promoted the improvement of smart home technology. Many wireless technologies are used in the Internet of Things, which provides a good technical reference for wireless-based smart home systems. At the same time, with the introduction of Bluetooth Low Power Consumption by the Bluetooth Group (SIG), which aims to enter the broad field of the Internet of Things, the research on Bluetooth-based smart home systems has more practical significance and technical guarantees. Based on the above situation, a wireless-based smart home system architecture is firstly designed, and on the basis of this architecture, the overall architecture of a smart home smart controller based on Bluetooth technology is designed.

1. Wireless smart home system architecture

The architecture system level of the Internet of Things is generally divided into three layers, namely the perception layer (information perception network), the network layer (network communication infrastructure), and the application layer (application service support system). On the basis of the system architecture of the Internet of Things, according to the analysis of the information communication process of the smart home, this paper designs a four-layer wireless smart home architecture system, from the bottom to the top: the perception layer, the local area network layer, the wide area network layer and the application layer.

The perception layer of smart home is mainly supported by various perception technologies, and combined with corresponding control technologies to complete perception and expression tasks. The perception layer is mainly responsible for identifying and acquiring information about smart home appliances, environmental information such as temperature and humidity, and safety information such as gas concentration.

The local area network layer mainly adopts wireless transmission methods, such as ZigBee, Bluetooth and other wireless transmission protocols or public protocols such as IP addresses, and sends the information data collected by the perception layer through the smart home controller to the wide area network layer. Or send the control information of the smart home controller to the device controller of the perception layer, so as to complete the control task. The smart home controller is the core part of the local area network layer, which is responsible for the interconnection of the home local area network, protocol conversion, equipment monitoring, data calculation, data encryption and other functions, and at the same time undertakes the role of information interaction with the wide area network layer.

The wide area network layer of the smart home mainly relies on the existing Internet and mobile communication network to transmit the data information of the perception layer to the application of the smart home system that needs information data. Generally, the 4G mode of the mobile network or the Ethernet mode can be used to exchange information and data with the smart home controller.

The main function of the application layer in the Internet of Things is to process and apply the data in the Internet of Things. The application layer of the smart home is similar to it, and the corresponding application business system is established according to the different business functions or service needs of the smart home. These application systems analyze and process the data information collected by the perception layer, and then make decisions and feed them back to the perception layer to complete the control operation, thereby realizing the intelligent control of smart homes.

2. Wireless Smart Home Applications and Functions

Through the comparison with the functions of traditional smart homes and the analysis of the characteristics of wireless smart homes, wireless smart homes should have home communication, home intelligent control, home security and monitoring, home environment monitoring and energy-saving management, and provide services such as home shopping and online education. and other management functions. Based on the above analysis of wireless smart home, the smart home designed in this paper can be divided into the following five subsystems:

(1) Home security monitoring and danger alarm system: It can detect the concentration of combustible gas, smoke concentration and unexpected power failure in the home; or monitor the intrusion of strangers when the owner is not at home. If the above dangers occur, the security monitoring and danger alarm system can send an alarm signal to the owner, thereby ensuring the safety of the home environment. The system consists of various smart detectors including door magnetic sensors, smoke sensors, combustible gas detectors, and smart home controllers.

(2) Home environment information monitoring system: realize the collection of indoor home temperature, air humidity, and sunlight exposure information data and present it to the user, and combine the home equipment control system and lighting control system to complete the intelligent control of the home. The system consists of temperature and humidity detectors, light intensity sensors and many other detectors and smart home controllers.

(3) Home equipment control system: through various home environment information obtained by sensors or user's artificial control information, use smart sockets, smart switches and other equipment to achieve the purpose of controlling home appliances in the home. The system consists of smart home controllers, smart switch terminal devices and smart home appliances.

(4) Home lighting control system: Complete the switch control and brightness adjustment of various lights such as bedroom lights and living room lights in the home. The system should include various light fixtures, smart switches, regulators, and smart home controllers.

(5) Home access control system: This system can provide users with two ways of home access and remote access to access, control and manage the environmental information data of the smart home and control the home equipment. The short-distance access method can be completed directly by operating the smart home controller; the remote access method is realized through a mobile phone or a remote PC.

3. Bluetooth-based wireless smart home system

The short-range wireless communication technology of wireless smart home requires good communication efficiency and stability, a communication distance of 10-100 meters, low use cost and low energy consumption. The main feature of the Bluetooth 4.0 standard adopted by the Bluetooth Group (SIG) is low power consumption, and its purpose is to meet the requirements of the Internet of Things for short-range communication technology and enter this field. The bluetooth-based wireless smart home system structure designed in this paper is shown in Figure 2. According to the functional division, smart home access system equipment can be divided into four parts: Bluetooth sensor acquisition device, smart home controller, smart home device control device and access control device.

The Bluetooth sensor acquisition device is composed of a Bluetooth communication module equipped with various sensors such as smoke sensors, temperature and humidity sensors, etc. The data information of the home environment collected by the sensors and the status information of information appliances are sent to the smart home controller through the Bluetooth communication module. The device control equipment receives the control signal sent by the smart home controller through the Bluetooth module, and completes the control of lighting, home appliances and other home devices. The smart home controller is composed of a core embedded system equipped with a Bluetooth module, which can calculate and analyze sensory data information, make control operation commands, or display data information on the screen. The smart home controller can realize the communication between the wireless network inside the home and the external community network or the Internet, so that users can access the smart home controller through the remote Internet, control and query various devices and information data within the entire home range.

4. Overall scheme design of Bluetooth-based smart home controller

In the above-mentioned wireless smart home system, the smart home controller is in the most important functional position. It is the central hub of the home's internal network and the link for communication inside and outside the home. According to the previous analysis of the wireless smart home system, the smart home controller should meet the following requirements:

(1) Low-energy smart home controllers generally require 24-hour uninterrupted services for home security and monitoring, and at the same time meet the mobility of the controller, so they must be equipped with batteries to work, which requires the function of the home controller consumption should be as low as possible;

(2) Reliability The software and hardware running on the smart home controller should be safe and reliable;

(3) Scalability Due to the rapid development of microelectronics and computer technology, new equipment, new functions and new services emerge in an endless stream, so smart home controllers are required to have good scalability;

(4) Simple and friendly user interface Now users not only have relatively high demands on the functions of smart products, but also hope that the equipment they use has a friendly interface and simple and convenient operation. Therefore, the user interface of the smart home controller should be friendly and simple, and easy to operate;

The smart home controller applied to the above bluetooth-based wireless smart home system architecture is an embedded device with bluetooth communication function. In terms of hardware, its processor adopts Samsung's S3C6410 ARM processor, and is equipped with core circuit modules and peripheral communication modules. The smart home controller communicates with the community network or the Internet through the Internet interface. In terms of software, the Android operating system is used as the platform, and corresponding drivers are designed according to different hardware modules. At the same time, according to the needs of remote control and on-site control functions of smart homes, an embedded Web server is built on the software system and corresponding application software is designed and implemented. .

The data information collected in the collection device is transmitted to the smart home controller through the Bluetooth communication module, and the Bluetooth communication module in the smart home controller is responsible for receiving and sending information, and passing the information to the ARM processor, and the ARM processor is responsible for information processing. The system in which the information collection device is connected to the smart home controller is shown in Figure 4. Remote users access the smart home controller through an Internet browser as well as the Internet.

Summarize

This paper first proposes a smart home architecture using wireless communication technology based on the Internet of Things architecture, and then analyzes the functions that wireless smart homes should have and the smart home systems that are divided according to functions. Aiming at the bluetooth communication technology, a smart home access system and method based on bluetooth technology is studied and analyzed. Finally, based on the design framework of the smart home system above, the overall scheme design of the smart home controller based on bluetooth is described.

The above are the details of the smart home system design scheme introduced by Shenzhen Zuchuang Microelectronics Co., Ltd. for you. If you have electronic function development needs for smart home products, you can trust us. We have rich experience in customized development of electronic products. We can evaluate the development cycle and IC price as soon as possible, and can also calculate PCBA quotations. We are a number of chip agents at home and abroad: Songhan, Yingguang, Jieli, Ankai, Quanzhi, realtek, with MCU, voice IC, Bluetooth IC and module, wifi module. Our development capabilities cover PCB design, single-chip microcomputer development, Bluetooth technology development, software customization development, APP customization development, WeChat official account development and other hardware and software design. It can also undertake the research and development of smart electronic products, the design of household appliances, the development of beauty equipment, the development of Internet of Things applications, the design of smart home solutions, the development of TWS earphones, the development of Bluetooth earphone speakers, the development of children's toys, and the development of electronic education products.