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Prevent dht.h being imported multiple times

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Added a basic #ifndef DHT_H to the dht.h file so that if you have a
larger program and want to access the sensor from a different file, you
don't import it twice.
This commit is contained in:
Colin Miller 2012-07-26 21:39:47 -07:00
parent 53e6481231
commit fca71323bd
1 changed files with 39 additions and 36 deletions
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75
DHT.h
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@ -1,36 +1,39 @@
#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;
boolean read(void);
unsigned long _lastreadtime;
boolean firstreading;
public:
DHT(uint8_t pin, uint8_t type);
void begin(void);
float readTemperature(bool S=false);
float convertCtoF(float);
float readHumidity(void);
};
#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;
boolean read(void);
unsigned long _lastreadtime;
boolean firstreading;
public:
DHT(uint8_t pin, uint8_t type);
void begin(void);
float readTemperature(bool S=false);
float convertCtoF(float);
float readHumidity(void);
};
#endif