Design and Implementation of Intelligent Refrigerator Based on Internet of Things (1)

Mobile phone crystal 3.2*2.5mm 3225 26M (26.000MHZ) 7.5PF 10PPM 20PPM 30PPM

3020 ice blue

Single chip microcomputer STM32L151CCU6

HT7550-1

With the rapid development of people's living standards, the pace of life is accelerating, and the role of refrigerators in the family is getting bigger and bigger, but it is troublesome to sort out. At the same time, it is often unclear whether food is used up or some food is forgotten in the refrigerator. Caused a variety of life troubles.

This design uses Radio Frequency Identification (RFID) technology, combined with the Internet and information processing technology, to establish a smart refrigerator food supervision system to achieve food records in the refrigerator. Then the food in the refrigerator can be displayed on the LCD screen of the refrigerator by querying the database, or the text can be sent to the refrigerator through the mobile phone to inquire the food at home, and the refrigerator food can be purchased through the mobile phone to meet the needs of the smart home in the future.

With the development of the Internet of Things, the investment in intelligent homes in the Internet of Things is rapidly expanding, and the finished products of RFID tags are continually decreasing. In the future, bar codes may be replaced as food outsourcing, and RFID tags are known for their durability, durability, and maintenance-free. As most people's families have reached the level of well-off, they are eager for more convenient and trouble-free home appliances. Although the system is only a prototype, but the price is moderate, and the use of more cutting-edge technology, more convenient than the traditional refrigerator, providing convenient for the busy life of the urban population, solving many trivial things in life, the market will be for most people Accepted.

1 system overall design

1.1 System overall plan

According to the function and technical requirements of the smart refrigerator terminal, it is decided to adopt the system structure of "hardware + software" to design the smart refrigerator terminal. The application layer is written on the basis of the OS according to the different requirements of the project. The parts are briefly introduced as follows:

The system is based on a hardware development platform based on Intel Xscale PXA270, which is an ARM processor with Intel XScale architecture.

The embedded operating system uses Windows CE 5.0. Windows CE is a highly modular embedded operating system that can be customized and reduced by the Platform Builder tool according to your own device requirements.

Application framework: qt-embedded-wince-opensource4.6 has a rich standard library, dynamic engine, Widget style sheet, powerful graphics and multi-threading features; high performance, small footprint and other features on Windows CE .

The system is used as a home appliance. The food can be inquired and accessed online at any time through the network. Users can learn about the refrigerator food information through SMS and decide whether to purchase online. The overall scheme of the system is shown in Figure 1.

1.2 System Module

According to the design, we divide the whole system into three main modules, as shown in Figure 2.

1.3 Module Function Description

(1) Food status module.

(2) Online shopping module.

(3) Cookbook module.

2. Hardware design