GY-63_MS5611/libraries/DHTNEW/dhtnew.h
2018-04-03 18:23:45 +02:00

75 lines
1.8 KiB
C++

//
// FILE: dhtnew.h
// AUTHOR: Rob Tillaart
// VERSION: 0.1.4
// PURPOSE: DHT Temperature & Humidity Sensor library for Arduino
// URL: --
//
// HISTORY:
// see dhtnew.cpp file
//
#ifndef dhtnew_h
#define dhtnew_h
#include <Arduino.h>
#define DHTNEW_LIB_VERSION "0.1.3 - dhtnew"
#define DHTLIB_OK 0
#define DHTLIB_ERROR_CHECKSUM -1
#define DHTLIB_ERROR_TIMEOUT -2
#define DHTLIB_INVALID_VALUE -999
#define DHTLIB_DHT11_WAKEUP 18
#define DHTLIB_DHT_WAKEUP 1
// max timeout is 100usec.
// For a 16Mhz proc that is max 1600 clock cycles
// loops using TIMEOUT use at least 4 clock cycli
// so 100 us takes max 400 loops
// so by dividing F_CPU by 40000 we "fail" as fast as possible
#define DHTLIB_TIMEOUT (F_CPU/40000)
class DHTNEW
{
public:
DHTNEW(uint8_t pin);
// 0 = unknown, 11 or 22
int getType() { return _type; };
int read();
// lastRead is in MilliSeconds since start sketch
uint32_t lastRead() { return _lastRead; };
float humidity;
float temperature;
// adding offsets works well in normal range
// but can introduce under- or overflow
void setHumOffset(float offset) { _humOffset = offset; };
void setTempOffset(float offset) { _tempOffset = offset; };
float getHumOffset() { return _humOffset; };
float getTempOffset() { return _tempOffset; };
bool getDisableIRQ() { return _disableIRQ; };
void setDisableIRQ(bool b ) { _disableIRQ = b; };
private:
uint8_t _pin = 0;
uint8_t _wakeupDelay = 0;
uint8_t _type = 0;
float _humOffset = 0.0;
float _tempOffset = 0.0;
uint32_t _lastRead = 0;
bool _disableIRQ = false;
uint8_t _bits[5]; // buffer to receive data
int _read();
int _readSensor();
};
#endif
// END OF FILE