#include <DHT.h>
#define DHTPIN 2 // what digital pin we're connected to
#define DHTTYPE DHT21 // DHT 11
DHT dht(DHTPIN, DHTTYPE);
void setup() { Serial.begin(9600);
Serial.println("DHT21 test!");
dht.begin();
}
void loop() {
// Wait a few seconds between measurements.
float h = dht.readHumidity();
float t = dht.readTemperature();
// Check if any reads failed and exit early (to try again).
if(isnan(h) || isnan(t))
{
Serial.println("Failed to read from DHT sensor!");
}
else
{
Serial.print("Time: ");
time = millis()/1000;
Serial.print(time);
Serial.print(" secs\t");
Serial.print("Humidity: ");
Serial.print(h);
Serial.print(" %\t");
Serial.print("Temperature : ");
Serial.print(t);
Serial.print(" *C ");
}
ลง library หรือยังครับ
