1-Use the MQ-4 series gas sensor to monitor the content of specific gases (such as methane) in the environment. Its output analog voltage increases as the gas content increases.
2-Use Hangshun microcontroller to collect the sensor voltage in real time, and then output it to ESP8266 through the serial port and transmit it to the Raspberry Pi server through the wifi network.
3-Use python to open a tcp-sever to listen to the specified port, receive the data uploaded by the microcontroller, and write it to the file.
4-Use nginx to open a web server, write a simple html page, and use the php language to parse the data file to display the corresponding collected data.
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