First test compile OK

examples/MQ4/MQ4.ino

@@ -0,0 +1,12 @@
+#include <MQUnifiedsensor.h>
+
+
+void setup() {
+  // put your setup code here, to run once:
+
+}
+
+void loop() {
+  // put your main code here, to run repeatedly:
+
+}

library.properties

@@ -0,0 +1,10 @@
+name=MQUnifiedsensor
+version=1.0.0
+author= Miguel Califa <miguelangel5612@gmail.com>, Yersson Carrillo <miguelangel5612@gmail.com>, Ghiordy Contreras <miguelangel5612@gmail.com>
+maintainer= Miguel Califa <miguelangel5612@gmail.com>
+sentence= This is a unified library to use sensors MQ: 2, 3, 4, 5, 6, 7, 8, 9, and 135.
+paragraph= This is a unified library to use sensors MQ: 2, 3, 4, 5, 6, 7, 8, 9, and 135.
+category= Sensor
+url=https://github.com/miguel5612/MQSensorsLib
+architectures=*
+license=MIT

src/MQUnifiedsensor.cpp

@@ -1,168 +1,37 @@
 #include "MQUnifiedsensor.h"
 
-MQUnifiedsensor::MQSensor(int pin) {
+
+void MQUnifiedsensor::MQSensor(int pin, int type) {
   this->_pin = pin;
+  this->_type = type; //2,3,4,5,6,7,8,9,131,135,303,309
 }
 
-MQUnifiedsensor::setR0(double R0) {
+void MQUnifiedsensor::setR0(double R0) {
   this->_R0 = R0;
 }
 
-/******************  Info of sensor graphic      *******************/
+String MQUnifiedsensor::readSensor(String nameLectureReqeuired)
-//MQ-2 - Methane, Butane, LPG, smoke
-
-
-
-//MQ-3 - Alcohol, Ethanol, smoke
-
-
-
-//MQ-4 - Methane, CNG Gas
-
-const float R0 = 11.820;
-const float m = -0.318;
-const float b = 1.133;
-
-//MQ-5 - Natural gas, LPG
-
-
-
-//MQ-6 - LPG, butane gas
-
-
-
-//MQ-7 - Carbon Monoxide
-
-
-
-//MQ-8 - Hydrogen Gas
-
-
-
-//MQ-9 - Carbon Monoxide, flammable gasses
-
-
-
-//MQ131 - Ozone
-
-
-
-//MQ135 - Air Quality (CO, Ammonia, Benzene, Alcohol, smoke)
-
-
-
-//MQ136 - Hydrogen Sulfide gas
-
-
-
-//MQ137 - Ammonia
-   
-
-/******************  Info of sensor graphic      *******************/
-
-
-
-//***************** Operations ************************************/
-
-
-int readMethane()
-{
-
-}
-int readButane()
-{
-
-}
-int readLPG()
-{
-
-}
-int readSmoke()
-{
-
-}
-int readAlcohol()
-{
-
-}
-int readEthanol()
-{
-
-}
-int readCNG()
-{
-
-}
-int readLPG()
-{
-
-}
-int readCO()
 {
+  switch (_type)
+  {
+  case 1:
+    break;
+  
+  default:
+    break;
+  }
 
 }
-int readHO()
-{
 
-}
+void MQUnifiedsensor::getSensorCharacteristics(int MQ[38], String nameLectureReqeuired)
-int readCarbonMonoxide()
-{
-    
-}
-int readNH4()
-{
-    
-}
-int readbenzene()
-{
-    
-}
-int readAlcohol()
-{
-    
-}
-int readHidrogen()
-{
-    
-}
-int readToluene()
-{
-    
-}
-int readAcetone()
-{
-    
-}
-int readPropane()
-{
-    
-}
-int readCoalGas()
 {
-    
+  if(nameLectureReqeuired = nameLecture[0])
+  {
+    _m = MQ[indexSlopeLectures[0]];
+    _b = MQ[indexBPointLectures[0]];
+  }
 }
 
-
-
-
-
-
-
-
-
-
-
-
-
-
-
-
-const float VOLT_RESOLUTION = 5.0; // if 3.3v use 3.3
-const int ADC_RESOLUTION = 10; // for 10bit analog to digital converter.
-
-const int retries = 50;
-const int retry_interval = 20;
-
 double MQUnifiedsensor::calibrate() {
     float sensor_volt; //Define variable for sensor voltage
     float RS_air; //Define variable for sensor resistance
@@ -189,7 +58,7 @@ double MQUnifiedsensor::getVoltage() {
   /**
     * Returns the PPM concentration
     */
-  int MQUnifiedsensor::read() {
+  int MQUnifiedsensor::readPPM(int m, int b) {
     double sensor_volt = this->getVoltage();
     double RS_gas; //Define variable for sensor resistance
     double ratio; //Define variable for ratio
@@ -201,4 +70,4 @@ double MQUnifiedsensor::getVoltage() {
     double ppm_log = (log10(ratio) - b) / m; //Get ppm value in linear scale according to the the ratio value
     double ppm = pow(10, ppm_log); //Convert ppm value to log scale
     return floor(ppm);
-}
+  }

src/MQUnifiedsensor.h

@@ -1,7 +1,8 @@
 #ifndef MQUnifiedsensor_H
-#define MQUnifiedsensor_H
+  #define MQUnifiedsensor_H
 
 #include <Arduino.h>
+#include <stdint.h>
 
 class MQUnifiedsensor
 {
@@ -9,9 +10,24 @@ class MQUnifiedsensor
     /**
      * Constructor
      */
-    MQSensor(int pin);
+    void MQSensor(int pin, int type);
-    setR0(double R0);
+    void setR0(double R0);
-    setSensorTyp(int sensorNumber);
+    void setSensorTyp(int sensorNumber);
+    void getSensorCharacteristics(int MQ[38], String nameLectureReqeuired);
+    String readSensor(String nameLectureReqeuired);
+    int readPPM(int m, int b);
+
+    /**
+     * Calibrates the start point of 400
+    */    
+    double calibrate();
+
+    /**
+     * Returns the voltage
+     */
+    double getVoltage();
+    
+
     /**
      * Returns the PPM concentration    
     MQ-2 - Methane, Butane, LPG, smoke
@@ -48,40 +64,14 @@ class MQUnifiedsensor
     int MQ303A[38] = {0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,-2.3543,1.144,-2.4338,0.7558,-2.5597,0.4436};
     int MQ309A[38] = {-2.1311,3.0886,0,0,-1.6554,2.985,-4.7623,6.7413,-3.7686,5.6744,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0};
 
-    int readMethane();
-    int readButane();
-    int readLPG();
-    int readSmoke();
-    int readAlcohol();
-    int readEthanol();
-    int readCNG();
-    int readLPG();
-    int readCO();
-    int readHO();
-    int readCarbonMonoxide();
-    int readNH4();
-    int readbenzene();
-    int readAlcohol();
-    int readHidrogen();
-    int readToluene();
-    int readAcetone();
-    int readPropane();
-    int readCoalGas();
 
-
-    /**
-     * Calibrates the start point of 400
-     */    
-    double calibrate();
-
-    /**
-     * Returns the voltage
-     */
-    double getVoltage();
-    
   private:
-    int _pin;
+    int _pin, _type;
-    double _R0;
+    double _R0, _m, _b;
+    const float VOLT_RESOLUTION = 5.0; // if 3.3v use 3.3
+    const int ADC_RESOLUTION = 10; // for 10bit analog to digital converter.
+    const int retries = 50;
+    const int retry_interval = 20;
 };
 
 #endif //MQUnifiedsensor_H