ABSTRACT
The module of the controller is STM32F103RCT. The crystal system is the most important of the system,
1 SYSTEM DESIGN SCHEME
This paper mainly focuses on the data of acquisition and automatic monitoring system of the greenhouse environment (Ohyama et al. 2003). The environmental control system is composed of the human computer interaction module, the data storage module, the processor module, the control module and the environment factor collection module. The structure of the control system is follows:
1.1 System working process
STM32 controller sends data acquisition commands to the timer, according to the commands, the sensor will collect environmental data within the growth environment and return the data to the controller (Stipanicev et al. 2003). Control system
the frequency of the STM32 depends on the system frequency and the STM32 usually works at the highest frequency of 72 MHz to get a good performance.
