mirror of
https://github.com/sigmasternchen/MH-Z-CO2-Sensors
synced 2025-03-15 06:38:55 +00:00
253f8ae7d1
* the preheating time is now a constant variable too * it is no possible to initialize the senor without PWM xor without (Soft-)Serial *
51 lines
976 B
C++
51 lines
976 B
C++
/* MHZ library
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By Tobias Schürg
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*/
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#ifndef MHZ_H
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#define MHZ_H
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#if ARDUINO >= 100
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#include "Arduino.h"
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#else
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#include "WProgram.h"
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#endif
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#include <SoftwareSerial.h>
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// types of sensors.
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extern const int MHZ14A;
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extern const int MHZ19B;
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// status codes
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extern const int STATUS_NO_RESPONSE;
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extern const int STATUS_CHECKSUM_MISMATCH;
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extern const int STATUS_INCOMPLETE;
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extern const int STATUS_NOT_READY;
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class MHZ {
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public:
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MHZ(uint8_t rxpin, uint8_t txpin, uint8_t pwmpin, uint8_t type);
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MHZ(uint8_t rxpin, uint8_t txpin, uint8_t type);
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MHZ(uint8_t pwmpin, uint8_t type);
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MHZ(Stream * serial, uint8_t pwmpin, uint8_t type);
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MHZ(Stream * serial, uint8_t type);
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void setDebug(boolean enable);
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boolean isPreHeating();
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boolean isReady();
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int readCO2UART();
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int readCO2PWM();
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int getLastTemperature();
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private:
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uint8_t _pwmpin, _type, temperature;
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boolean debug = false;
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Stream * _serial;
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byte getCheckSum(byte *packet);
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};
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#endif
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