The design is based on MSP430F149 single-chip microcomputer as the main control unit, CC2530 is the data acquisition unit greenhouse greenhouse data acquisition system CC2530 connected temperature and humidity sensor AM2301, carbon dioxide sensor TGS4161 and illumination sensor BH1750, collecting temperature and humidity, carbon dioxide concentration and light intensity in the greenhouse And the collected data is sent to the MSP430F149 single-chip microcomputer equipped with the CC2530 module, and the received data is analyzed and processed by the single-chip microcomputer and sent to the upper computer for storage display. The overall block diagram, acquisition circuit and system software flow chart of the system are given. The actual test shows that the system can accurately complete the collection of temperature and humidity, carbon dioxide concentration and light intensity, low power consumption, and has the characteristics of intelligent sensor network. It has a good market prospect and promotion value in the field of intelligent agriculture.
The growth of crops is affected by natural conditions such as temperature and humidity, carbon dioxide concentration and light. With the development of computer technology and wireless sensor networks, the use of information technology to transform agriculture, especially agricultural greenhouses, is an inevitable stage of agricultural development. Greenhouse environmental testing is an important part of achieving intelligent control of greenhouses. How to effectively use sensor technology, automatic detection technology, communication technology and computer technology to develop a data acquisition system for measuring greenhouse temperature, humidity, light and carbon dioxide concentration, etc., is an important issue for scientists and technicians. . China's smart greenhouses started late, and existing greenhouse greenhouse control systems have a single collection of environmental elements, and the technology is not mature enough. Therefore, it is necessary to design a greenhouse greenhouse data acquisition system with independent intellectual property rights. This paper designs a greenhouse greenhouse data acquisition system using ultra-low-power single-chip MSP430F149 as the control core. It can realize the real-time collection and transmission of temperature, humidity, carbon dioxide concentration and illumination in the greenhouse. The data collected by the main control unit will be passed. After analysis and processing, it is sent to the host computer via USB for real-time display and storage. The system uses less hardware resources, stable circuit operation, lower power consumption, and is easy to carry and install.
1 overall design
The overall structure of the system is shown in Figure 1.
Figure 1 Overall structure of the system
The CC2530 is connected to the temperature and humidity sensor AM2301, the carbon dioxide sensor TGS4161 and the illumination sensor BH1750 to measure the real-time temperature, carbon dioxide concentration and illumination intensity. The data is processed and packaged and sent to the CC2530 routing node, and the routing node sends the received data to the routing node. The MSP430F149.MSP430F149 with the CC2530 wireless module analyzes the data sent by the routing node, filters out the invalid data, and sends the data to the upper computer for storage display via USB. The role played by the USB port is also the download of the BSL mode program of the MSP430F149. For greenhouses less than 50 meters in length, you can choose a suitable location to place a CC2530 module with sensors; for long greenhouses, you can increase the number of CC2530 modules according to the general transmission distance of CC2530.
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