71 lines
1.5 KiB
C++
71 lines
1.5 KiB
C++
/* DHT library
|
|
|
|
MIT license
|
|
written by Adafruit Industries
|
|
*/
|
|
#ifndef DHT_H
|
|
#define DHT_H
|
|
|
|
#include "Arduino.h"
|
|
|
|
|
|
// Uncomment to enable printing out nice debug messages.
|
|
//#define DHT_DEBUG
|
|
|
|
// Define where debug output will be printed.
|
|
#define DEBUG_PRINTER Serial
|
|
|
|
// Setup debug printing macros.
|
|
#ifdef DHT_DEBUG
|
|
#define DEBUG_PRINT(...) { DEBUG_PRINTER.print(__VA_ARGS__); }
|
|
#define DEBUG_PRINTLN(...) { DEBUG_PRINTER.println(__VA_ARGS__); }
|
|
#else
|
|
#define DEBUG_PRINT(...) {}
|
|
#define DEBUG_PRINTLN(...) {}
|
|
#endif
|
|
|
|
// Define types of sensors.
|
|
#define DHT11 11
|
|
#define DHT22 22
|
|
#define DHT21 21
|
|
#define AM2301 21
|
|
|
|
|
|
class DHT {
|
|
public:
|
|
DHT(uint8_t pin, uint8_t type, uint8_t count=6);
|
|
void begin(void);
|
|
float readTemperature(bool S=false, bool force=false);
|
|
float convertCtoF(float);
|
|
float convertFtoC(float);
|
|
float computeHeatIndex(float temperature, float percentHumidity, bool isFahrenheit=true);
|
|
float readHumidity(bool force=false);
|
|
boolean read(bool force=false);
|
|
|
|
private:
|
|
uint8_t data[5];
|
|
uint8_t _pin, _type;
|
|
#ifdef __AVR
|
|
// Use direct GPIO access on an 8-bit AVR so keep track of the port and bitmask
|
|
// for the digital pin connected to the DHT. Other platforms will use digitalRead.
|
|
uint8_t _bit, _port;
|
|
#endif
|
|
uint32_t _lastreadtime, _maxcycles;
|
|
bool _lastresult;
|
|
|
|
uint32_t expectPulse(bool level);
|
|
|
|
};
|
|
|
|
class InterruptLock {
|
|
public:
|
|
InterruptLock() {
|
|
noInterrupts();
|
|
}
|
|
~InterruptLock() {
|
|
interrupts();
|
|
}
|
|
|
|
};
|
|
|
|
#endif
|