“…Figure 7 is a software interface running on an all-in-one machine, where Measurement Studio components and pictures are used to display the current running state. Since .NET Framework 2.0, Microsoft Visual Studio has provided the SerialPort class for serial port control [6] , the SerialPort class implements the Modbus RTU protocol to communicate with the main control board, reads the real-time oxygen concentration, temperature, and humidity values of the main control board, and reads the time-stamped oxygen concentration, temperature and humidity historical information stored on the main control board. And it can modify the main control board to control operating parameters such as target value, control accuracy, cloud SMS alarm threshold, etc.…”