#ifndef MQUnifiedsensor_H #define MQUnifiedsensor_H #include #include //Count of posible lectures #define lecturesAvailable 19 //Index in the nameLecture vector #define defaultMQ2 "LPG" // LPG #define defaultMQ3 "Alcohol" // Alcohol #define defaultMQ4 "CH4" // CH4 #define defaultMQ5 "H2" //H2 #define defaultMQ6 "CH4" // CH4 #define defaultMQ7 "CO" //CO #define defaultMQ8 "H2" //H2 #define defaultMQ9 "LPG" // LPG #define defaultMQ131 "O3" //O3 #define defaultMQ135 "NH4" //NH4 #define defaultMQ303 "Isobutano" //Isobutano #define defaultMQ309 "CO" //CO /*****************************Globals***********************************************/ //From the graph, we can see that the resistance ratio in fresh air is a constant: #define RatioMQ2CleanAir 9.83 //RS / R0 = 9.83 ppm #define RatioMQ3CleanAir 60 //RS / R0 = 60 ppm #define RatioMQ4CleanAir 4.4 //RS / R0 = 4.4 ppm #define RatioMQ5CleanAir 6.5 //RS / R0 = 6.5 ppm #define RatioMQ6CleanAir 10 //RS / R0 = 10 ppm #define RatioMQ7CleanAir 27.5 //RS / R0 = 27.5 ppm #define RatioMQ8CleanAir 70 //RS / R0 = 70 ppm #define RatioMQ9CleanAir 9.6 //RS / R0 = 9.6 ppm #define RatioMQ131CleanAir 15 //RS / R0 = 15 ppm #define RatioMQ135CleanAir 3.6//RS / R0 = 3.6 ppm #define RatioMQ303CleanAir 1 //RS / R0 = 1 ppm #define RatioMQ309CleanAir 11 //RS / R0 = 11 ppm //From the calibration program we can obtain the R0 value for each sensor #define R0_MQ2 9.659574468 //R0 after 48 hours pre-heating the sensor #define R0_MQ3 3.86018237 //R0 after 48 hours pre-heating the sensor #define R0_MQ4 47.775076 //R0 after 48 hours pre-heating the sensor #define R0_MQ5 71.100304 //R0 after 48 hours pre-heating the sensor #define R0_MQ6 13.4285714 //R0 after 48 hours pre-heating the sensor #define R0_MQ7 4 //R0 after 48 hours pre-heating the sensor #define R0_MQ8 1 //R0 after 48 hours pre-heating the sensor #define R0_MQ9 9.42857143 //R0 after 48 hours pre-heating the sensor #define R0_MQ131 385.40 //R0 after 48 hours pre-heating the sensor Thanks ostaquet HIGH_CONCENTRATION #define R0_MQ135 76.63 //R0 after 48 hours pre-heating the sensor Thanks Georgk https://github.com/GeorgK/MQ135/blob/master/MQ135.h #define R0_MQ303 10 //R0 after 48 hours pre-heating the sensor #define R0_MQ309 10 //R0 after 48 hours pre-heating the sensor /***********************Software Related Macros************************************/ #define ADC_RESOLUTION 10 // for 10bit analog to digital converter. #define retries 5 #define retry_interval 20 /**********************Application Related Macros**********************************/ /* Gas, Value of m (Slope) and b (Cut on x axis) points */ //Values consolidated //Equation PPM = a*((x)^b) /********************** MQ2 ******************************************************/ #define MQ2_H2_a -2.2459 #define MQ2_H2_b 2.9845 #define MQ2_LPG_a -2.2879 #define MQ2_LPG_b 2.7901 #define MQ2_CO_a -2.6208 #define MQ2_CO_b 3.6075 #define MQ2_Alcohol_a -3.1157 #define MQ2_Alcohol_b 4.5134 #define MQ2_Propane_a -2.7028 #define MQ2_Propane_b 3.5595 #define MQ2_Benzene_a -2.2879 #define MQ2_Benzene_b 2.7901 /********************** MQ3 ******************************************************/ #define MQ3_LPG_a 44771 #define MQ3_LPG_b -3.245 #define MQ3_CH4_a 2*10^31 #define MQ3_CH4_b 19.01 #define MQ3_CO_a 521853 #define MQ3_CO_b -3.821 #define MQ3_Alcohol_a 0.3934 #define MQ3_Alcohol_b -1.504 #define MQ3_Benzene_a 1.8006 #define MQ3_Benzene_b -0.373 #define MQ3_Hexane_a 22.996 #define MQ3_Hexane_b -0.351 /********************** MQ4 ******************************************************/ #define MQ4_LPG_a -2.5818 #define MQ4_LPG_b 3.6303 #define MQ4_CH4_a 0.9873 #define MQ4_CH4_b 2.6386 #define MQ4_CO_a -5.5945 #define MQ4_CO_b 5.6693 #define MQ4_Alcohol_a -11.89 #define MQ4_Alcohol_b 9.0375 #define MQ4_smoke_a -11.189 #define MQ4_smoke_b 9.0375 /********************** MQ5 ******************************************************/ #define MQ5_H2_a -4.368 #define MQ5_H2_b 2.9667 #define MQ5_LPG_a -2.5723 #define MQ5_LPG_b 1.8943 #define MQ5_CH4_a -2.4438 #define MQ5_CH4_b 2.3044 #define MQ5_CO_a -4.8188 #define MQ5_CO_b 5.2023 #define MQ5_Alcohol_a -4.419 #define MQ5_Alcohol_b 4.8044 /********************** MQ6 ******************************************************/ #define MQ6_H2_a -3.6775 #define MQ6_H2_b 5.0286 #define MQ6_LPG_a -1.6567 #define MQ6_LPG_b 2.8775 #define MQ6_CH4_a -1 #define MQ6_CH4_b 3.301 #define MQ6_CO_a -12.791 #define MQ6_CO_b 14.523 #define MQ6_Alcohol_a -5.8057 #define MQ6_Alcohol_b 7.5292 /********************** MQ7 ******************************************************/ #define MQ7_H2_a -1.329 #define MQ7_H2_b 1.8864 #define MQ7_LPG_a -7.8626 #define MQ7_LPG_b 9.1056 #define MQ7_CH4_a -5.4878 #define MQ7_CH4_b 8.8387 #define MQ7_CO_a -1.4065 #define MQ7_CO_b 2.0162 #define MQ7_Alcohol_a -6.3219 #define MQ7_Alcohol_b 9.924 /********************** MQ8 ******************************************************/ #define MQ8_H2_a -0.7152 #define MQ8_H2_b 2.9891 #define MQ8_LPG_a -3.419 #define MQ8_LPG_b 7.3513 #define MQ8_CH4_a -7.5609 #define MQ8_CH4_b 15.243 #define MQ8_CO_a -7.0753 #define MQ8_CO_b 15.396 #define MQ8_Alcohol_a -1.7459 #define MQ8_Alcohol_b 4.7575 /********************** MQ9 ******************************************************/ #define MQ9_LPG_a -2.2535 #define MQ9_LPG_b 2.9855 #define MQ9_CH4_a -1.6012 #define MQ9_CH4_b 3.1476 #define MQ9_CO_a -1.749 #define MQ9_CO_b 2.827 /********************** MQ131 ******************************************************/ #define MQ131_NOx_a -2.7245 #define MQ131_NOx_b 3.3004 #define MQ131_CL2_a -1.0333 #define MQ131_CL2_b 1.7117 #define MQ131_O3_a -1.2037 #define MQ131_O3_b 1.6455 /********************** MQ135 ******************************************************/ #define MQ135_CO_a -2.7268 #define MQ135_CO_b 2.301 #define MQ135_Alcohol_a -2.8608 #define MQ135_Alcohol_b 1.8627 #define MQ135_CO2_a -3.2819 #define MQ135_CO2_b 1.9903 #define MQ135_Tolueno_a -5.7015 #define MQ135_Tolueno_b 1.1612 #define MQ135_NH4_a -2.2119 #define MQ135_NH4_b 2.0473 #define MQ135_Acetona_a -5.9682 #define MQ135_Acetona_b 1.0175 /********************** MQ303 ******************************************************/ #define MQ303_Iso_butano_a -2.3543 #define MQ303_Iso_butano_b 1.144 #define MQ303_Hydrogeno_a -2.4338 #define MQ303_Hydrogeno_b 0.7558 #define MQ303_Ethanol_a -2.5597 #define MQ303_Ethanol_b 0.4436 /********************** MQ309 ******************************************************/ #define MQ309_H2_a -2.1311 #define MQ309_H2_b 3.0886 #define MQ309_CH4_a -1.6554 #define MQ309_CH4_b 2.985 #define MQ309_CO_a -4.7623 #define MQ309_CO_b 6.7413 #define MQ309_Alcohol_a -3.7686 #define MQ309_Alcohol_b 5.6744 /* const String _MQ2[18] = {"H2","-2.2459","2.9845","LPG","-2.2879","2.7901","CO","-2.6208","3.6075","Alcohol","-3.1157","4.5134","Propane","-2.7028","3.5595","Benzene","-2.2879","2.7901"}; const String _MQ3[18] = {"LPG","-3.1851","4.7048","CH4","-17.531","28.785","CO","-4.339","6.4432","Alcohol","-1.435","0.4103","Benzene","-2.7009","0.632","Hexane","-2.7268","3.6299"}; const String _MQ4[15] = {"LPG","-2.5818","3.6303","CH4","0.9873","2.6386","CO","-5.5945","5.6693","Alcohol","-11.89","9.0375","smoke","-11.189","9.0375"}; const String _MQ5[15] = {"H2","-4.368","2.9667","LPG","-2.5723","1.8943","CH4","-2.4438","2.3044","CO","-4.8188","5.2023","Alcohol","-4.419","4.8044"}; const String _MQ6[15] = {"H2","-3.6775","5.0286","LPG","-1.6567","2.8775","CH4","-1","3.301","CO","-12.791","14.523","Alcohol","-5.8057","7.5292"}; const String _MQ7[15] = {"H2","-1.329","1.8864","LPG","-7.8626","9.1056","CH4","-5.4878","8.8387","CO","-1.4065","2.0162","Alcohol","-6.3219","9.924"}; const String _MQ8[15] = {"H2","-0.7152","2.9891","LPG","-3.419","7.3513","CH4","-7.5609","15.243","CO","-7.0753","15.396","Alcohol","-1.7459","4.7575"}; const String _MQ9[9] = {"LPG","-2.2535","2.9855","CH4","-1.6012","3.1476","CO","-1.749","2.827"}; const String _MQ131[9] = {"Nox","-2.7245","3.3004","CL2","-1.0333","1.7117","O3","-1.2037","1.6455"}; const String _MQ135[18] = {"CO","-2.7268","2.301","Alcohol","-2.8608","1.8627","CO2","-3.2819","1.9903","Tolueno","-5.7015","1.1612","NH4","-2.2119","2.0473","Acetona","-5.9682","1.0175"}; const String _MQ303A[9] = {"Iso-butano","-2.3543","1.144","Hydrogeno","-2.4338","0.7558","Ethanol","-2.5597","0.4436"}; const String _MQ309A[12] = {"H2","-2.1311","3.0886","CH4","-1.6554","2.985","CO","-4.7623","6.7413","Alcohol","-3.7686","5.6744"}; */ class MQUnifiedsensor { public: MQUnifiedsensor(int pin, int type); //Functions to set values void inicializar(); void update(); void setR0(double R0 = 10); void setVoltResolution(float voltaje = 5); void setSensorCharacteristics(String nameLectureReqeuired = "", bool print = false); void setDefaultGas(); //user functions float calibrate(boolean print = false); float readSensor(String nameLectureRequeired = "", bool print = false); //get function for info double getR0(); double getVoltage(int read = true); double stringToDouble(String & str); String getnameLecture(); private: /************************Private vars************************************/ int _pin, _type, _lecturePosInArray; double _R0; String _nameLectureRequeired; int _VOLT_RESOLUTION = 5.0; // if 3.3v use 3.3 int _RLValue = 10; //Value in KiloOhms float _PPM, _RS_Calc; float _ratioInCleanAir, _sensor_volt, RS_air, _a, _b, _ratio; }; #endif //MQUnifiedsensor_H