Added algorithm tester example - Work in progress

examples/AlgorithmTester/AlgorithmTester.ino

@@ -0,0 +1,97 @@
+//Include the library
+#include <MQUnifiedsensor.h>
+
+/*
+    This program was made to test the algorithm that from the ratio obtains 
+    the PPM (The core of this library), regardless of the plate in which the 
+    result is executed should give a small error (ideally less than 5%), is 
+    our way of self-evaluation, we tell the library what is the value of the 
+    ratio and ask him to calculate the PPM and compare it against the value 
+    that should really give, these values were taken from the same datasheet 
+    with which the library was made.
+*/
+
+//Definitions
+#define placa "Arduino Mega 2560"
+#define Voltage_Resolution 5
+#define type "MQ-Board"
+#define ADC_Bit_Resolution 10 // For arduino UNO/MEGA/NANO
+#define pin2 A2 //Analog input 2 of your arduino
+#define pin3 A3 //Analog input 3 of your arduino
+#define pin4 A4 //Analog input 4 of your arduino
+#define pin5 A5 //Analog input 5 of your arduino
+#define pin6 A6 //Analog input 6 of your arduino
+#define pin7 A7 //Analog input 7 of your arduino
+#define pin8 A8 //Analog input 8 of your arduino
+#define pin9 A9 //Analog input 9 of your arduino
+//#define calibration_button 13 //Pin to calibrate your sensor
+
+//Declare Sensor
+MQUnifiedsensor MQ2(placa, Voltage_Resolution, ADC_Bit_Resolution, pin2, type);
+MQUnifiedsensor MQ3(placa, Voltage_Resolution, ADC_Bit_Resolution, pin3, type);
+MQUnifiedsensor MQ4(placa, Voltage_Resolution, ADC_Bit_Resolution, pin4, type);
+MQUnifiedsensor MQ5(placa, Voltage_Resolution, ADC_Bit_Resolution, pin5, type);
+MQUnifiedsensor MQ6(placa, Voltage_Resolution, ADC_Bit_Resolution, pin6, type);
+MQUnifiedsensor MQ7(placa, Voltage_Resolution, ADC_Bit_Resolution, pin7, type);
+MQUnifiedsensor MQ8(placa, Voltage_Resolution, ADC_Bit_Resolution, pin8, type);
+MQUnifiedsensor MQ9(placa, Voltage_Resolution, ADC_Bit_Resolution, pin9, type);
+
+
+void setup()
+{
+//Init serial port
+  Serial.begin(9600);
+  //init the sensor
+  MQ2.init();
+  MQ2.setRegressionMethod("Exponential"); //_PPM =  a*ratio^b
+  MQ2.setA(574.25); MQ2.setB(-2.222); // Configurate the ecuation values to get LPG concentration
+  MQ2.setR0(9.659574468);
+
+  MQ3.init(); 
+  MQ3.setRegressionMethod("Exponential"); //_PPM =  a*ratio^b
+  MQ3.setA(4.8387); MQ3.setB(-2.68); // Configurate the ecuation values to get Benzene concentration
+  MQ3.setR0(3.86018237);
+
+  MQ4.init(); 
+  MQ4.setRegressionMethod("Exponential"); //_PPM =  a*ratio^b
+  MQ4.setA(1012.7); MQ4.setB(-2.786); // Configurate the ecuation values to get CH4 concentration
+  MQ4.setR0(3.86018237);
+
+  MQ5.init(); 
+  MQ5.setRegressionMethod("Exponential"); //_PPM =  a*ratio^b
+  MQ5.setA(1163.8); MQ5.setB(-3.874); // Configurate the ecuation values to get H2 concentration
+  MQ5.setR0(71.100304);
+  
+  MQ6.init(); 
+  MQ6.setRegressionMethod("Exponential"); //_PPM =  a*ratio^b
+  MQ6.setA(2127.2); MQ6.setB(-2.526); // Configurate the ecuation values to get CH4 concentration
+  MQ6.setR0(13.4285714);
+  
+  MQ7.init(); 
+  MQ7.setRegressionMethod("Exponential"); //_PPM =  a*ratio^b
+  MQ7.setA(99.042); MQ7.setB(-1.518); // Configurate the ecuation values to get CO concentration
+  MQ7.setR0(4);
+  
+  MQ8.init(); 
+  MQ8.setRegressionMethod("Exponential"); //_PPM =  a*ratio^b
+  MQ8.setA(976.97); MQ8.setB(-0.688); // Configurate the ecuation values to get H2 concentration
+  MQ8.setR0(1);
+  
+  MQ9.init(); 
+  MQ9.setRegressionMethod("Exponential"); //_PPM =  a*ratio^b
+  MQ9.setA(1000.5); MQ9.setB(-2.186); // Configurate the ecuation values to get LPG concentration
+  MQ9.setR0(9.42857143);
+  //Print in serial monitor
+  Serial.print("MQ2 to MQ9 - test program");
+}
+
+void loop()
+{
+
+}
+
+double calculatePercentualError(double expectedValue, double calculatedValue)
+{
+    // Return the diference between two measures
+    return abs(calculatedValue-expectedValue)/expectedValue
+}