本内容遵循CC 4.0 BY-SA版权协议 DHT22是数字式温湿度复合传感器，采用单总线通信协议，只需要一根IO口完成数据收发。传感器内部集成测温测湿元件，经过内部模数转换，输出数字信号给单片机。
V3.0 - Using NodeMCU ESP8266 for controlling switches (Relay). Uses RTC (Real Time Clock - DS3231) and NTP (Network Time Protocol) for maintaining time. OLED Display (128x64) for instant updates. A ...
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