#include"DHT.h"
#define D DHT22
#define P 4
DHT dht(P,D);
void setup(){Serial.begin(9600);dht.begin();}
void loop(){delay(1000);float h=dht.readHumidity(),c=dht.readTemperature();if(isnan(h)||isnan(c)){Serial.println("E");return;}Serial.print("湿:");Serial.print(h);Serial.print("% 温:");Serial.print(c);Serial.println("C");}