Design of temperature and humidity monitoring terminal for cold storage

Cold storage is an important part of modern agriculture, and the temperature and humidity are the important parameters of each warehouse must be considered. The multi-point temperature and humidity data acquisition controller is designed in the paper with a MCU. The controller is Used AT89S52 as the core chip, measured by the digital sensor SHT75 in temperature and humidity, expended external circuit, realized multi-point temperature, humidity display, parameter setting, real-time monitoring and network transmission. This paper details the hardware principle diagram, and introduces the software flow. Tests show that the design is correct, safe and reliable.