模拟智能灌溉系统.要求“模拟智能灌溉系统”能够实现土壤湿度测量、土壤湿度和时间显示、湿度阈值设定及存储等基本功能。通过电位器 Rb2 输出电压信号，模拟湿度传感器输出信号，再通过AD 采集完成湿度测量功能-Intelligent irrigation system.Requirements "intelligent irrigation system" can achieve soil moisture measurement, soil humidity and time display, humidity threshold setting and the basic function such as storage. Through the potentiometer rb2’s much-publicised output voltage signal, simulation of humidity sensor output signal, again through the AD collection complete humidity measurement function