In order to regulate the environment parameters such as temperature, humidity and carbon dioxide content, the environmental parameters monitoring system based on power line communication is designed and developed. The various greenhouse are divided into nodes, various physical parameters are collected through STM32 chip, and then the parameters is transmitted to the total node through the power supply line by using the FSK modulation signal, at last it is transmitted to the PC machine through 232 serial communication to realize the real-time monitoring of the greenhouse. The hardware of the system is composed of power carrier module, STM32, MX232, DHT11 temperature and humidity sensors and so on. The experimental results show that the system is reliable.%为了调节适合蔬菜、水果生长的温室大棚温度、湿度以及二氧化碳含量等环境参数,设计开发了基于电力线通信的环境参数监控系统.将每个温室大棚设为分节点,通过STM32芯片采集各个物理量参数后,再通过FSK调制信号使用供电线路上传送给总节点后,232串口通信传输到PC机,实现了对温室大棚的实时监控.该系统硬件由电力载波模块、STM32、MX232、DHT11温湿度传感器等组成,实验结果表明,系统可以实现多个点的数据传输,运行可靠.
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