Added MQ-8 and MQ-9

examples/MQ-131/MQ-131.ino

@@ -1,7 +1,7 @@
 /*
-  MQUnifiedsensor Library - reading an MQ131
+  MQUnifiedsensor Library - reading an MQ9
 
-  Demonstrates the use a MQ131 sensor.
+  Demonstrates the use a MQ9 sensor.
   Library originally added 01 may 2019
   by Miguel A Califa, Yersson Carrillo, Ghiordy Contreras, Mario Rodriguez
  
@@ -9,6 +9,10 @@
   modified 23 May 2019
   by Miguel Califa 
 
+  Updated library usage
+  modified 26 March 2020
+  by Miguel Califa 
+
  This example code is in the public domain.
 
 */
@@ -17,61 +21,55 @@
 #include <MQUnifiedsensor.h>
 
 //Definitions
+#define placa "Arduino UNO"
+#define Voltage_Resolution 5
 #define pin A0 //Analog input 0 of your arduino
-#define type 131 //MQ131
+#define type "MQ-8" //MQ9
+#define ADC_Bit_Resolution 10 // For arduino UNO/MEGA/NANO
 //#define calibration_button 13 //Pin to calibrate your sensor
 
 //Declare Sensor
-MQUnifiedsensor MQ131(pin, type);
+MQUnifiedsensor MQ9(placa, Voltage_Resolution, ADC_Bit_Resolution, pin, type);
-
-//Variables
-float NOx, CL2, O3;
 
 void setup() {
+  //Init the serial port communication - to debug the library
   Serial.begin(9600); //Init serial port
-   //init the sensor
-  /*****************************  MQInicializar****************************************
-  Input:  pin, type 
-  Output:  
-  Remarks: This function create the sensor object.
-  ************************************************************************************/ 
-  MQ131.inicializar(); 
-  //pinMode(calibration_button, INPUT);
-}
 
-void loop() {
+  //Set math model to calculate the PPM concentration and the value of constants
-  MQ131.update(); // Update data, the arduino will be read the voltaje in the analog pin
+  MQ9.setRegressionMethod("Exponential"); //_PPM =  a*ratio^b
+  MQ9.setA(1000.5); MQ9.setB(-2.186); // Configurate the ecuation values to get LPG concentration
+
   /*
-    // Si el valor de RL es diferente a 10K por favor asigna tu valor de RL con el siguiente metodo:
+    Exponential regression:
-    MQ131.setRL(10);
+  GAS     | a      | b
+  LPG     | 1000.5 | -2.186
+  CH4     | 4269.6 | -2.648
+  CO      | 599.65 | -2.244
   */
+
+  // Calibration setup
+  MQ9.setR0(9.42857143);
+
   /* 
-  //Rutina de calibracion - Uncomment if you need (setup too and header)
+    //If the RL value is different from 10K please assign your RL value with the following method:
-  if(calibration_button)
+    MQ9.setRL(10);
-  {
-    float R0 = MQ131.calibrate();
-    MQ131.setR0(R0);
-  }
   */
-  /*****************************  MQReadSensor  ****************************************
-  Input:   Gas - Serial print flag
-  Output:  Value in PPM
-  Remarks: This function use readPPM to read the value in PPM the gas in the air.
-  ************************************************************************************/ 
-  //Read the sensor and print in serial port
-  //Lecture will be saved in lecture variable
-  //float lecture =  MQ131.readSensor("", true); // Return O3 concentration
-  // Options, uncomment where you need
-  NOx =  MQ131.readSensor("NOx"); // Return NOx concentration
-  CL2 =  MQ131.readSensor("CL2"); // Return CL2 concentration
-  O3 =  MQ131.readSensor("O3"); // Return O3 concentration
 
-  Serial.println("***************************");
+  /*****************************  MQ Init ********************************************/ 
-  Serial.println("Lectures for MQ-131");
+  //Remarks: Configure the pin of arduino as input.
-  Serial.print("Volt: ");Serial.print(MQ131.getVoltage(false));Serial.println(" V"); 
+  /************************************************************************************/ 
-  Serial.print("R0: ");Serial.print(MQ131.getR0());Serial.println(" Ohm"); 
+  MQ9.init(); 
-  Serial.print("NOx: ");Serial.print(NOx,2);Serial.println(" ppm");
+  /*****************************  MQ Init ********************************************/ 
-  Serial.print("CL2: ");Serial.print(CL2,2);Serial.println(" ppm");
+  //Input: setup flag, if this function are on setup will print the headers (Optional - Default value: False)
-  Serial.print("O3: ");Serial.print(O3,2);Serial.println(" ppm");
+  //Output: print on serial port the information about sensor and sensor readings
-  Serial.println("***************************");  
+  //Remarks: Configure the pin of arduino as input.
+  /************************************************************************************/ 
+  MQ9.serialDebug(true);
+}
+
+void loop() {
+  MQ9.update(); // Update data, the arduino will be read the voltage on the analog pin
+  MQ9.readSensor(); // Sensor will read PPM concentration using the model and a and b values setted before or in the setup
+  MQ9.serialDebug(); // Will print the table on the serial port
+  delay(500); //Sampling frequency
 }

examples/MQ-8/MQ-8.ino

@@ -9,6 +9,10 @@
   modified 23 May 2019
   by Miguel Califa 
 
+  Updated library usage
+  modified 26 March 2020
+  by Miguel Califa 
+
  This example code is in the public domain.
 
 */
@@ -17,65 +21,57 @@
 #include <MQUnifiedsensor.h>
 
 //Definitions
+#define placa "Arduino UNO"
+#define Voltage_Resolution 5
 #define pin A0 //Analog input 0 of your arduino
-#define type 8 //MQ8
+#define type "MQ-8" //MQ8
+#define ADC_Bit_Resolution 10 // For arduino UNO/MEGA/NANO
 //#define calibration_button 13 //Pin to calibrate your sensor
 
 //Declare Sensor
-MQUnifiedsensor MQ8(pin, type);
+MQUnifiedsensor MQ8(placa, Voltage_Resolution, ADC_Bit_Resolution, pin, type);
-
-//Variables
-float H2, LPG, CH4, CO, Alcohol;
 
 void setup() {
+  //Init the serial port communication - to debug the library
   Serial.begin(9600); //Init serial port
-   //init the sensor
-  /*****************************  MQInicializar****************************************
-  Input:  pin, type 
-  Output:  
-  Remarks: This function create the sensor object.
-  ************************************************************************************/ 
-  MQ8.inicializar(); 
-  //pinMode(calibration_button, INPUT);
-}
 
-void loop() {
+  //Set math model to calculate the PPM concentration and the value of constants
-  MQ8.update(); // Update data, the arduino will be read the voltaje in the analog pin
+  MQ8.setRegressionMethod("Exponential"); //_PPM =  a*ratio^b
+  MQ8.setA(976.97); MQ8.setB(-0.688); // Configurate the ecuation values to get H2 concentration
+
   /*
-    //Si el valor de RL es diferente a 10K por favor asigna tu valor de RL con el siguiente metodo:
+    Exponential regression:
-    MQ8.setRL(10);
+  GAS     | a      | b
+  H2      | 976.97  | -0.688
+  LPG     | 10000000 | -3.123
+  CH4     | 80000000000000 | -6.666
+  CO      | 2000000000000000000 | -8.074
+  Alcohol | 76101 | -1.86
   */
+  
+  // Calibration setup
+  MQ8.setR0(1);
+
   /* 
-  //Rutina de calibracion - Uncomment if you need (setup too and header)
+    //If the RL value is different from 10K please assign your RL value with the following method:
-  if(calibration_button)
+    MQ8.setRL(10);
-  {
-    float R0 = MQ8.calibrate();
-    MQ8.setR0(R0);
-  }
   */
-  /*****************************  MQReadSensor  ****************************************
-  Input:   Gas - Serial print flag
-  Output:  Value in PPM
-  Remarks: This function use readPPM to read the value in PPM the gas in the air.
-  ************************************************************************************/ 
-  //Read the sensor and print in serial port
-  //Lecture will be saved in lecture variable
-  //float lecture =  MQ8.readSensor("", true); // Return H2 concentration
-  // Options, uncomment where you need
-  H2 =  MQ8.readSensor("H2"); // Return CH4 concentration
-  LPG =  MQ8.readSensor("LPG"); // Return LPG concentration
-  CH4 =  MQ8.readSensor("CH4"); // Return CH4 concentration
-  CO =  MQ8.readSensor("CO"); // Return CO concentration
-  Alcohol =  MQ8.readSensor("Alcohol"); // Return Alcohol concentration
 
-  Serial.println("***************************");
+  /*****************************  MQ Init ********************************************/ 
-  Serial.println("Lectures for MQ-8");
+  //Remarks: Configure the pin of arduino as input.
-  Serial.print("Volt: ");Serial.print(MQ8.getVoltage(false));Serial.println(" V"); 
+  /************************************************************************************/ 
-  Serial.print("R0: ");Serial.print(MQ8.getR0());Serial.println(" Ohm"); 
+  MQ8.init(); 
-  Serial.print("H2: ");Serial.print(H2,2);Serial.println(" ppm");
+  /*****************************  MQ Init ********************************************/ 
-  Serial.print("LPG: ");Serial.print(LPG,2);Serial.println(" ppm");
+  //Input: setup flag, if this function are on setup will print the headers (Optional - Default value: False)
-  Serial.print("CH4: ");Serial.print(CH4,2);Serial.println(" ppm");
+  //Output: print on serial port the information about sensor and sensor readings
-  Serial.print("CO: ");Serial.print(CO,2);Serial.println(" ppm");
+  //Remarks: Configure the pin of arduino as input.
-  Serial.print("Alcohol: ");Serial.print(Alcohol,2);Serial.println(" ppm");
+  /************************************************************************************/ 
-  Serial.println("***************************");  
+  MQ8.serialDebug(true);
+}
+
+void loop() {
+  MQ8.update(); // Update data, the arduino will be read the voltage on the analog pin
+  MQ8.readSensor(); // Sensor will read PPM concentration using the model and a and b values setted before or in the setup
+  MQ8.serialDebug(); // Will print the table on the serial port
+  delay(500); //Sampling frequency
 }

examples/MQ-9/MQ-9.ino

@@ -9,6 +9,10 @@
   modified 23 May 2019
   by Miguel Califa 
 
+  Updated library usage
+  modified 26 March 2020
+  by Miguel Califa 
+
  This example code is in the public domain.
 
 */
@@ -17,61 +21,55 @@
 #include <MQUnifiedsensor.h>
 
 //Definitions
+#define placa "Arduino UNO"
+#define Voltage_Resolution 5
 #define pin A0 //Analog input 0 of your arduino
-#define type 9 //MQ9
+#define type "MQ-9" //MQ9
+#define ADC_Bit_Resolution 10 // For arduino UNO/MEGA/NANO
 //#define calibration_button 13 //Pin to calibrate your sensor
 
 //Declare Sensor
-MQUnifiedsensor MQ9(pin, type);
+MQUnifiedsensor MQ9(placa, Voltage_Resolution, ADC_Bit_Resolution, pin, type);
-
-//Variables
-float CO, CH4, LPG;
 
 void setup() {
+  //Init the serial port communication - to debug the library
   Serial.begin(9600); //Init serial port
-  //init the sensor
-  /*****************************  MQInicializar****************************************
-  Input:  pin, type 
-  Output:  
-  Remarks: This function create the sensor object.
-  ************************************************************************************/ 
-  MQ9.inicializar(); 
-  //pinMode(calibration_button, INPUT);
-}
 
-void loop() {
+  //Set math model to calculate the PPM concentration and the value of constants
-  MQ9.update(); // Update data, the arduino will be read the voltaje in the analog pin
+  MQ9.setRegressionMethod("Exponential"); //_PPM =  a*ratio^b
+  MQ9.setA(1000.5); MQ9.setB(-2.186); // Configurate the ecuation values to get LPG concentration
+
   /*
-    //Si el valor de RL es diferente a 10K por favor asigna tu valor de RL con el siguiente metodo:
+    Exponential regression:
-    MQ9.setRL(10);
+  GAS     | a      | b
+  LPG     | 1000.5 | -2.186
+  CH4     | 4269.6 | -2.648
+  CO      | 599.65 | -2.244
   */
+
+  // Calibration setup
+  MQ9.setR0(9.42857143);
+
   /* 
-  //Rutina de calibracion - Uncomment if you need (setup too and header)
+    //If the RL value is different from 10K please assign your RL value with the following method:
-  if(calibration_button)
+    MQ9.setRL(10);
-  {
-    float R0 = MQ9.calibrate();
-    MQ9.setR0(R0);
-  }
   */
- /*****************************  MQReadSensor  ****************************************
-  Input:   Gas - Serial print flag
-  Output:  Value in PPM
-  Remarks: This function use readPPM to read the value in PPM the gas in the air.
-  ************************************************************************************/ 
-  //Read the sensor and print in serial port
-  //Lecture will be saved in lecture variable
-  //float lecture =  MQ9.readSensor("", true); // Return LPG concentration
-  // Options, uncomment where you need
-  LPG =  MQ9.readSensor("LPG"); // Return LPG concentration
-  CH4 =  MQ9.readSensor("CH4"); // Return CH4 concentration
-  CO =  MQ9.readSensor("CO"); // Return CO concentration
 
-  Serial.println("***************************");
+  /*****************************  MQ Init ********************************************/ 
-  Serial.println("Lectures for MQ-9");
+  //Remarks: Configure the pin of arduino as input.
-  Serial.print("Volt: ");Serial.print(MQ9.getVoltage(false));Serial.println(" V"); 
+  /************************************************************************************/ 
-  Serial.print("R0: ");Serial.print(MQ9.getR0());Serial.println(" Ohm"); 
+  MQ9.init(); 
-  Serial.print("CO: ");Serial.print(CO,2);Serial.println(" ppm");
+  /*****************************  MQ Init ********************************************/ 
-  Serial.print("LPG: ");Serial.print(LPG,2);Serial.println(" ppm");
+  //Input: setup flag, if this function are on setup will print the headers (Optional - Default value: False)
-  Serial.print("CH4: ");Serial.print(CH4,2);Serial.println(" ppm");
+  //Output: print on serial port the information about sensor and sensor readings
-  Serial.println("***************************");  
+  //Remarks: Configure the pin of arduino as input.
+  /************************************************************************************/ 
+  MQ9.serialDebug(true);
+}
+
+void loop() {
+  MQ9.update(); // Update data, the arduino will be read the voltage on the analog pin
+  MQ9.readSensor(); // Sensor will read PPM concentration using the model and a and b values setted before or in the setup
+  MQ9.serialDebug(); // Will print the table on the serial port
+  delay(500); //Sampling frequency
 }