#pragma once // // FILE: MHZCO2.h // AUTHOR: Rob Tillaart // VERSION: 0.1.3 // PURPOSE: Arduino Library for MHZ series CO2 sensors // DATE: 2020-05-05 // URL: https://github.com/RobTillaart/MHZCO2 // #include "Arduino.h" #define MHZCO2_LIB_VERSION (F("0.1.3")) #define MHZCO2_OK 0 #define MHZCO2_TIMEOUT -10 #define MHZCO2_ERROR_CRC -11 class MHZCO2 { public: MHZCO2(); // Stream is either a HW or SW serial. void begin(Stream * str); uint32_t uptime(); // PPM = 2000, 5000, 10000 (other values unknown) // check datasheet void setPPM(uint16_t PPM); uint16_t getPPM(); // MEASUREMENT int measure(); uint32_t lastMeasurement(); int getCO2(); int getTemperature(); int getAccuracy(); int getMinCO2(); // CALIBRATION // USE WITH CARE => READ DATASHEET! void calibrateZero(); void calibrateSpan(uint16_t span); void calibrateAuto(bool mode = true); protected: Stream * _str; uint32_t _startTime; uint32_t _lastMeasurement; uint16_t _PPM = 0; int _CO2 = 0; int _temperature = 0; int _accuracy = 0; int _minCO2 = 0; void send(uint8_t * data, uint8_t len); int receive(uint8_t * answer); uint8_t checksum(uint8_t * arr); }; ///////////////////////////////////////////////////////// // // DERIVED CLASSES // class MHZ1311A : public MHZCO2 { public: MHZ1311A(); }; class MHZ19 : public MHZCO2 { public: MHZ19(); }; class MHZ19B : public MHZCO2 { public: MHZ19B(); }; class MHZ19C : public MHZCO2 { public: MHZ19C(); }; class MHZ19D : public MHZCO2 { public: MHZ19D(); }; class MHZ19E : public MHZCO2 { public: MHZ19E(); }; // -- END OF FILE --