GY-63_MS5611/libraries/DHT2pin/dht2pin.h
2023-01-29 20:16:17 +01:00

69 lines
1.5 KiB
C++

#pragma once
//
// FILE: dht2pin.h
// AUTHOR: Rob Tillaart
// VERSION: 0.2.0
// PURPOSE: DHT Temperature & Humidity Sensor library for Arduino
// URL: https://github.com/RobTillaart/DHT2pin
// http://arduino.cc/playground/Main/DHTLib
#include <Arduino.h>
#define DHT2PIN_LIB_VERSION (F("0.2.0"))
#define DHTLIB_OK 0
#define DHTLIB_ERROR_CHECKSUM -1
#define DHTLIB_ERROR_TIMEOUT -2
#define DHTLIB_ERROR_CONNECT -3
#define DHTLIB_ERROR_ACK_L -4
#define DHTLIB_ERROR_ACK_H -5
#define DHTLIB_INVALID_VALUE -999
#define DHTLIB_DHT11_WAKEUP 18
#define DHTLIB_DHT_WAKEUP 1
// max timeout is 100usec.
// For a 16Mhz processor that is max 1600 clock cycles
// loops using TIMEOUT use at least 4 clock cycles
// so 100 us takes max 400 loops
// so by dividing F_CPU by 40000 we "fail" as fast as possible
#ifdef F_CPU
#define DHTLIB_TIMEOUT (F_CPU/40000)
#else
#define DHTLIB_TIMEOUT (75000000/40000)
#endif
class DHT2pin
{
public:
DHT2pin(uint8_t rpin, uint8_t wpin);
void begin();
// return values:
// DHTLIB_OK
// DHTLIB_ERROR_CHECKSUM
// DHTLIB_ERROR_TIMEOUT
int read11();
int read();
float humidity();
float temperature();
private:
uint8_t _rpin;
uint8_t _wpin;
uint8_t _bits[5]; // buffer to receive data
float _humidity;
float _temperature;
int _readSensor(uint8_t wakeupDelay);
};
// -- END OF FILE --