1. // DHT code from:
2. // Example testing sketch for various DHT humidity/temperature sensors
3. // Written by ladyada, public domain
4.  
5. #include "DHT.h"
6.  
7. #define DHTPIN 2     // what pin we're connected to
8.  
9. // Uncomment whatever type you're using!
10. #define DHTTYPE DHT11   // DHT 11
11. // #define DHTTYPE DHT22   // DHT 22  (AM2302)
12. //#define DHTTYPE DHT21   // DHT 21 (AM2301)
13. DHT dht(DHTPIN, DHTTYPE);
14.  
15. // LCD
16. // LCD RS=3, EN=4, DS4=5, DS5=6, DS6=7, DS7=8
17. #include <LiquidCrystal.h>
18. LiquidCrystal lcd( 3, 4, 5, 6, 7, 8);
19.  
20.  
21.  
22. void setup() {
23.   Serial.begin(9600);
24.   // set up the LCD's number of columns and rows:
25.   lcd.begin(16,2);
26.   dht.begin();
27. }
28.  
29. void loop() {
30.  
31.   // Reading temperature or humidity takes about 250 milliseconds!
32.   // Sensor readings may also be up to 2 seconds 'old' (its a very slow sensor)
33.   int h = dht.readHumidity();
34.   int t = dht.readTemperature();
35.  
36.     // set the cursor to (0,0):
37.   lcd.setCursor(0, 0);
38.   // print from 0 to 9:
39.  
40.    lcd.print("Temp: ");
41.    lcd.print(t);
42.    lcd.print("C");
43.   // set the cursor to (16,1):
44.   lcd.setCursor(0,1);
45.   lcd.print("Humidity: ");
46.   lcd.print(h);
47.   lcd.print("%");
48.     delay(200);
49. }
50.