DHT.h 820 Bytes
Newer Older
Nelso Jost's avatar
Nelso Jost committed
1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
28
29
30
31
32
33
34
35
36
37
38
39
40
41
#ifndef DHT_H
#define DHT_H
#if ARDUINO >= 100
 #include "Arduino.h"
#else
 #include "WProgram.h"
#endif

/* DHT library 

MIT license
written by Adafruit Industries
*/

// how many timing transitions we need to keep track of. 2 * number bits + extra
#define MAXTIMINGS 85

#define DHT11 11
#define DHT22 22
#define DHT21 21
#define AM2301 21

class DHT {
 private:
  uint8_t data[6];
  uint8_t _pin, _type, _count;
  unsigned long _lastreadtime;
  boolean firstreading;

 public:
  DHT(uint8_t pin, uint8_t type, uint8_t count=6);
  void begin(void);
  float readTemperature(bool S=false);
  float convertCtoF(float);
  float convertFtoC(float);
  float computeHeatIndex(float tempFahrenheit, float percentHumidity);
  float readHumidity(void);
  boolean read(void);

};
#endif