| With the development and innovation of technology,people have higher and higher demand for real-time wireless data acquisition and transmission display technology.The Bluetooth 4.0 technology released in 2010 integrates traditional Bluetooth technology,high-speed Bluetooth technology and low power Bluetooth technology.It not only inherits the advantages of Bluetooth technology in wireless communication,but also adds the characteristics of high-speed Bluetooth technology and low-power Bluetooth technology,it is a widely used low-power wireless communication technology.According to the above requirements,this paper designs and implements an indoor composite model based on Bluetooth 4.0,builds a multi-point indoor temperature and humidity information acquisition network,real-time monitoring of temperature and humidity information at different locations and transmission to the mobile terminal to be displayed.The main work done as follows.Firstly,based on the development of Bluetooth technology over the years,this paper introduces the development of Bluetooth technology at home and abroad,and discusses the importance of building a real-time data acquisition and monitoring system based on Bluetooth 4.0.Analyze and introduce the work way and principle of bluetooth 4.0.According to the specific needs of indoor temperature and humidity acquisition network,compared with the Bluetooth technology similar to several other major short-range wireless transmission technology,select the most appropriate wireless transmission solutions.Secondly,the design of a temperature and humidity data acquisition system based on Bluetooth 4.0,including sensor module,Bluetooth data transmission module,mobile terminal data display module.The CC2540 Bluetooth chip equipped with a temperature and humidity sensor is used as a Bluetooth node device to establish and communicate with another Android smart phone which is a Bluetooth concentrator device.There are multiple Bluetooth node devices that can realize one-to-many Bluetooth connection.Finally,the paper analyzes the internal structure of the Bluetooth protocol stack and the function of each part of the work,designed the data acquisition module workflow,Bluetooth module broadcast,connection process,and data transfer process.The collected data is then sent to a smart phone client equipped with an Android system for display.So as to achieve the effect of real-time collection and monitoring of the temperature and humidity information in different places in the house.This system can realize the real-time collection and monitoring effect of indoor multi-point temperature and humidity information.The use of Bluetooth 4.0 technology not only connect fast,high transfer rate,more importantly,the entire system has a very low power consumption,this has some considerable reference value and application value for some application scenarios that require high cost,complicated scene environment and difficult wiring. |
