MH-Z-CO2-Sensors/MHZ.h
Andreas Horn 253f8ae7d1 implements various small fixes and improvements
* the preheating time is now a constant variable too
* it is no possible to initialize the senor without PWM xor without (Soft-)Serial
*
2019-06-08 13:37:21 +02:00

51 lines
976 B
C++

/* MHZ library
By Tobias Schürg
*/
#ifndef MHZ_H
#define MHZ_H
#if ARDUINO >= 100
#include "Arduino.h"
#else
#include "WProgram.h"
#endif
#include <SoftwareSerial.h>
// types of sensors.
extern const int MHZ14A;
extern const int MHZ19B;
// status codes
extern const int STATUS_NO_RESPONSE;
extern const int STATUS_CHECKSUM_MISMATCH;
extern const int STATUS_INCOMPLETE;
extern const int STATUS_NOT_READY;
class MHZ {
public:
MHZ(uint8_t rxpin, uint8_t txpin, uint8_t pwmpin, uint8_t type);
MHZ(uint8_t rxpin, uint8_t txpin, uint8_t type);
MHZ(uint8_t pwmpin, uint8_t type);
MHZ(Stream * serial, uint8_t pwmpin, uint8_t type);
MHZ(Stream * serial, uint8_t type);
void setDebug(boolean enable);
boolean isPreHeating();
boolean isReady();
int readCO2UART();
int readCO2PWM();
int getLastTemperature();
private:
uint8_t _pwmpin, _type, temperature;
boolean debug = false;
Stream * _serial;
byte getCheckSum(byte *packet);
};
#endif