DHT-11 with Arduino UNO
DHT-11 is temperature and humidity sensor which returns real time temperature and humidity of the environment.
#include "DHT.h"
#define DHTPIN 2 // what digital pin we're connected to
#define DHTTYPE DHT11 // DHT 11
DHT dht(DHTPIN, DHTTYPE);
void setup() {
Serial.begin(9600);
Serial.println("DHT11 Test!");
dht.begin();
}
void loop() {
delay(2000); // Wait a few seconds between measurements.
float h = dht.readHumidity(); //read humidity
float t = dht.readTemperature(); //read temperature
Serial.print("Humidity: ");
Serial.print(h);
Serial.print(" %\t");
Serial.print("Temperature: ");
Serial.print(t);
Serial.println(" *C ");
}