Temperatur och luftfuktighetssensor för arduino

(sensor DHT11)det här är en modul för temperatur och luftfuktighet. Den ger även /skickar kalibrerad digital signal. Den är tillverkad för långvarighet alltså produkten håller länge samt bra kvalité. Samt tillförlitlighet i svåra situationer.

1. /* Arduino example code for DHT11, DHT22/AM2302 and DHT21/AM2301 temperature and humidity sensors. More info: www.makerguides.com */
3. // Include the libraries:
4. #include <Adafruit_Sensor.h>
5. #include <DHT.h>
7. // Set DHT pin:
8. #define DHTPIN 2
10. // Set DHT type, uncomment whatever type you’re using!
11. #define DHTTYPE DHT11 // DHT 11
12. //#define DHTTYPE DHT22 // DHT 22 (AM2302)
13. //#define DHTTYPE DHT21 // DHT 21 (AM2301)
15. // Initialize DHT sensor for normal 16mhz Arduino:
16. DHT dht = DHT(DHTPIN, DHTTYPE);
18. void setup() {
19. // Begin serial communication at a baud rate of 9600:
20. Serial.begin(9600);
22. // Setup sensor:
23. dht.begin();
24. }
26. void loop() {
27. // Wait a few seconds between measurements:
28. delay(2000);
30. // Reading temperature or humidity takes about 250 milliseconds!
31. // Sensor readings may also be up to 2 seconds ‘old’ (its a very slow sensor)
33. // Read the humidity in %:
34. float h = dht.readHumidity();
35. // Read the temperature as Celsius:
36. float t = dht.readTemperature();
37. // Read the temperature as Fahrenheit:
38. float f = dht.readTemperature(true);
40. // Check if any reads failed and exit early (to try again):
41. if (isnan(h) || isnan(t) || isnan(f)) {
42. Serial.println(“Failed to read from DHT sensor!”);
43. return;
44. }
46. // Compute heat index in Fahrenheit (default):
47. float hif = dht.computeHeatIndex(f, h);
48. // Compute heat index in Celsius:
49. float hic = dht.computeHeatIndex(t, h, false);
52. Serial.print(“Humidity: “);
53. Serial.print(h);
54. Serial.print(” % “);
55. Serial.print(“Temperature: “);
56. Serial.print(t);
57. Serial.print(” \xC2\xB0″);
58. Serial.print(“C | “);
59. Serial.print(f);
60. Serial.print(” \xC2\xB0″);
61. Serial.print(“F “);
62. Serial.print(“Heat index: “);
63. Serial.print(hic);
64. Serial.print(” \xC2\xB0″);
65. Serial.print(“C | “);
66. Serial.print(hif);
67. Serial.print(” \xC2\xB0″);
68. Serial.println(“F”);