“…Using the STM32 serial port to connect to the server, the server receives the information and sends out the data information [5] . ONENET cloud platform connects to the server to get the data information and finally displays it on the display page of the cloud platform, so as to realize the detection of the environment by smart home [6] . The methane concentration acquisition circuit was confirmed through analysis and research using the MQ-4 natural gas sensor module, which is of high quality, durable, reliable, and stable [7] .…”