DHT21数字温湿度传感器是一款含有已校准数字信号输出的温湿度复合传

感器。它应用专用的数字模块采集技术和温湿度传感技术，确保产品具有极高

的可靠性与卓越的长期稳定性。传感器包括一个电容式感湿元件和一个NTC测

温元件，并与一个高性能8位单片机相连接

-DHT21 digital temperature and humidity sensor is a calibrated digital signal output with the temperature and humidity combined sensor. Its application-specific digital modules acquisition and temperature and humidity sensor technology, to ensure that products with high reliability and excellent long-term stability. Sensor includes a capacitive sense element and a NTC temperature wet components, and with a high-performance 8-bit microcontroller connected