中文摘要：

设计的温室大棚CO2浓度监控系统采用Arduino Mega2560作为控制器,CO2浓度传感器选用MG811,系统显示选用LCD 12864.MG811输出信号经放大后输入Arduino,由主控制器检测温室内CO2浓度、光强、温度等环境参数,依据预先设定的CO2浓度阈值3控制电加热CO2气肥反应器进行CO2补充施肥.

英文摘要：

A carbon dioxide control system in greenhouses takes Arduino Mega2560 as the main controlling kit, and it uses MGS11 carbon dioxide gas sensing probe to detect carbon dioxide gas concentration. The control system displays the system data through LCD 12864. The signal of MGS11 is amplified for Arduino input. The main control kit is used to acquire temperature, humidity, light intensity, concentration of carbon dioxide etc. through multiple sensors, and accomplish the online control of the system based on the carbon dioxide concentration threshold set in advance.