Partical Concentra Monitoring System Based On LoRa

China's economy and modernization is becoming more and more rapidly.There is also coming with environmental pollution problem.Most of the air quality monitoring stations is still use primitive methods to monitor the air quality.These methods are reliable but inefficient and expensive at the same time,we can not get the real-time concentration of the gas and the particulate matter.In the recent years,there are trend on using smart sensors and standards for the measurement of the air quality.In this paper,we propose a particle concentration monitoring system based on the LoRa Wireless Communication technology.The system includes sensor nodes,mobile phone Application and PC.As a communication technology of internet of thing,LoRa can improve the transmission distance and reduce the power consumption The system integrates a single-chip microcontroller,several air pollution sensors(PM1.0,PM10,PM2.5),LoRa Module,a solar PV-battery part and user terminal.As communication module LoRa sends the data to the central monitoring unit and then the data would be saved.The figures show that LoRa's communication distance is about 3Km and the TX power is only about 120 mA.LoRa has lower compared with other used wireless technology.An easy to use GUI and App was designed in the system.In this paper,the hardware of sensor nodes has been completed.STM32F103VET6 as the sensor control module is used to collect the data and transmit the data to the data center through LoRa technology.At the same time the data can be transmitted to the nearby users through Wi-Fi.The power supply system of the sensor nodes includes solar power supply module and the lithium battery.Finally,the PCB board is completed and hardware of the particle concentration monitoring system is also realized at the same time.In order to receive the data of concentration of the particulate matter,I design an application based on Android.Android Application's software compiling is on eclipse platform.Using the Java language complete the data exchange between the mobile phone Application and the sensor nodes,the display of data on mobile phone.In this paper,The GUI software of PC was developed using LabVIEW and G language.In the data center,PC can receive all the data from the sensor nodes and display the data.The designed interface can help users to complete the preservation,view history and other functionalities.The particle concentration monitoring system based on LoRa technology is presented in paper is used to collect particle matter concentration from 2017.3.31 to 2017.4.5.and I analyse the datas.System has several progressive features such as easy to operate,low cost,long distance,high coverage,efficient self-supply,long device battery life,and high capacity,fast response time with scientifically acceptable accuracy.At the same time,the system can covered the mobile phone and the computer.