A portable plant glucose monitoring device based on STM32 F103 ZET6 microcontroller is designed to monitor the glucose of plants on site

real-time and in vivo.The glucose concentration is monitored by electrochemical method using the needle glucose sensor developed by our laboratory.The hardware part of the system adopts modular processing.Each function module is designed

and the design for potentiostatic circuit（core circuit） is provided

and peripheral circuit electronic components is selected.In the software part

the main program controls the instrument to monitor the plants and displays the data graphically on the LCD.The subroutine is responsible for the specific functions such as data saving

data copying and historical backtracking.Compared with the electrochemical workstation

the linear correlation between the two groups of data is high

which indicates that the test results of the monitoring system are accurate.