Abstract
Using PIC16F1939 microcontroller, Siemens S7-200PLC and ESP8266 module, a cost-effective and online measurement and control system of VOCs terminal treatment is constructed. This paper introduces the system construction and control scheme, and designs the communication protocol between MCU and PLC, MCU and ESP8266 module, and describes the specific implementation process of the system software. The system integrates the analog acquisition function of the microcontroller, the stable control function of the PLC, and the convenient network access function of the ESP8266 module, which realizes detection of System operation status, and solves the problem of high cost of the PLC analog acquisition capability, and complicated network access of the PLC.
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