DHT11 Temperature and Humidity Sensor

1#include <DHT.h>
2
3#define DHTPIN 2     // Pin where the DHT11 is connected
4#define DHTTYPE DHT11   // DHT 11
5
6DHT dht(DHTPIN, DHTTYPE);
7
8void setup() {
9	Serial.begin(9600);
10	dht.begin();
11}
12
13void loop() {
14	// Reading temperature or humidity takes about 250 milliseconds!
15	// Sensor readings may also be up to 2 seconds 'old' (it's a very slow sensor)
16	float h = dht.readHumidity();
17	// Read temperature as Celsius (the default)
18	float t = dht.readTemperature();
19
20	// Check if any reads failed and exit early (to try again)
21	if (isnan(h) || isnan(t)) {
22		Serial.println("Failed to read from DHT sensor!");
23		return;
24	}
25
26	// Compute heat index in Celsius (isFahreheit = false)
27	float hic = dht.computeHeatIndex(t, h, false);
28
29	Serial.print("Humidity: ");
30	Serial.print(h);
31	Serial.print(" %	");
32	Serial.print("Temperature: ");
33	Serial.print(t);
34	Serial.print(" *C	");
35	Serial.print("Heat index: ");
36	Serial.print(hic);
37	Serial.println(" *C");
38
39	delay(2000);
40}