基于单片机的sht11温湿度感测器的温湿度控制系统，用1602 显示其温湿度值，并设有温湿度上下限，具有越限报警功能。-Sht11 microcontroller-based temperature and humidity sensor temperature and humidity control system, with the 1602 show its temperature and humidity values, and a lower limit on the temperat