Air Quality Detection System Based On QQ IOT

In recent years,with the economic development,industrial pollution and land desertification are becoming increasingly serious.The atmospheric particulate matter pollution problems become more prominent.With complex home improvement materials widely used,indoor air formaldehyde and benzene pollution problems cannot be ignored.Air quality problems have caused more and more concern from people.Outdoor ambient air quality information has been issued by the agency.But the means detection in small environment and indoor air around people detection are less,the price of detection is expensive,the test results cannot be networked and remote real-time monitoring cannot be realized to meet the demand of obtaining the indoor and air quality information in a timely manner for ordinary family.In view of this situation,this paper designs and implements a set of air quality inspection system based on QQ.The system can be divided into three levels: perception,transmission and application.The sensing layer is designed based on various sensors to complete the system data acquisition.The hardware core processor adopts STM32 microprocessor based on ARM Cortex-M3 core of STMicroelectronics and each sensor is connected directly to STM32.The driver of each sensor is based on the STM32 standard peripheral library and the communication transmission of each module is realized by DMA.Sensors include laser air dust sensors and electrochemical sensors that can quantitatively measure formaldehyde concentrations,as well as digital temperature and humidity sensors,small air pressure sensors,and so on.The transmission layer is designed to connect the perceptual layer data of the indoor air quality detection system into the QQ cloud platform and introduces the processing method of the event queue state machine to ensure the response time of the system.Application layer completes the mobile phone terminal "mobile QQ" APP embedded control page application design and uses user-based mobile phone QQ as a front-end carrier,so that the detection device becomes a "QQ friends".Mobile terminal can be used with like QQ Friends of the same time at any time on the air data for remote viewing.Air quality information can also be achieved rapid sharing of users through the QQ account system and the relationship between friends which strengthens the linkage between the final realization of the embedded air testing equipment into QQ A change in a smart device.Compared with the mature detection system,the system has high accuracy,low cost,rich in functionality,good portability and low threshold.The detection system has great significance and business value to improve the quality of life and prevent the disease caused by air.