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Updated examples to MQ-4

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miguel5612 5 years ago
parent 3b578869ad
commit 1311d9446d
3 changed files with 57 additions and 57 deletions
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3
examples/MQ-2/MQ-2.ino
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@ -31,9 +31,6 @@
//Declare Sensor
MQUnifiedsensor MQ2(placa, Voltage_Resolution, ADC_Bit_Resolution, pin, type);
//Variables
float CH4, LPG, CO, Alcohol, Hexane, Benzine;
void setup() {
//Init the serial port communication - to debug the library
Serial.begin(9600); //Init serial port

15
examples/MQ-3/MQ-3.ino
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@ -31,9 +31,6 @@
//Declare Sensor
MQUnifiedsensor MQ3(placa, Voltage_Resolution, ADC_Bit_Resolution, pin, type);
//Variables
float CH4, LPG, CO, Alcohol, Hexane, Benzine;
void setup() {
//Init the serial port communication - to debug the library
Serial.begin(9600); //Init serial port
@ -41,7 +38,17 @@ void setup() {
//Set math model to calculate the PPM concentration and the value of constants
MQ3.setRegressionMethod("Exponential"); //_PPM = a*ratio^b
MQ3.setA(4.8387); MQ3.setB(-2.68); // Configurate the ecuation values to get Benzene concentration
/*
Exponential regression:
Gas | a | b
LPG | 44771 | -3.245
CH4 | 2*10^31| 19.01
CO | 521853 | -3.821
Alcohol| 0.3934 | -1.504
Benzene| 4.8387 | -2.68
Hexane | 7585.3 | -2.849
*/
// Calibration setup
MQ3.setR0(3.86018237);

96
examples/MQ-4/MQ-4.ino
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@ -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 4 //MQ4
#define type "MQ-4" //MQ4
#define ADC_Bit_Resolution 10 // For arduino UNO/MEGA/NANO
//#define calibration_button 13 //Pin to calibrate your sensor
//Declare Sensor
MQUnifiedsensor MQ4(pin, type);
//Variables
float CH4, LPG, CO, Alcohol, smoke;
MQUnifiedsensor MQ4(placa, Voltage_Resolution, ADC_Bit_Resolution, pin, type);
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.
************************************************************************************/
MQ4.inicializar();
//pinMode(calibration_button, INPUT);
}
void loop() {
MQ4.update(); // Update data, the arduino will be read the voltaje in the analog pin
/*
//Si el valor de RL es diferente a 10K por favor asigna tu valor de RL con el siguiente metodo:
MQ4.setRL(10);
*/
//Set math model to calculate the PPM concentration and the value of constants
MQ4.setRegressionMethod("Exponential"); //_PPM = a*ratio^b
MQ4.setA(4.8387); MQ4.setB(-2.68); // Configurate the ecuation values to get Benzene concentration
/*
//Rutina de calibracion - Uncomment if you need (setup too and header)
if(calibration_button)
{
float R0 = MQ4.calibrate();
MQ4.setR0(R0);
}
Exponential regression:
Gas | a | b
LPG | 3811.9 | -3.113
CH4 | 1012.7 | -2.786
CO | 200000000000000 | -19.05
Alcohol| 60000000000 | -14.01
smoke | 30000000 | -8.308
*/
/***************************** 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 = MQ4.readSensor("", true); // Return CH4 concentration
// Options, uncomment where you need
CH4 = MQ4.readSensor("CH4"); // Return CH4 concentration
LPG = MQ4.readSensor("LPG"); // Return LPG concentration
CO = MQ4.readSensor("CO"); // Return CO concentration
Alcohol = MQ4.readSensor("Alcohol"); // Return Alcohol concentration
smoke = MQ4.readSensor("smoke"); // Return smoke concentration
Serial.println("***************************");
Serial.println("Lectures for MQ-4");
Serial.print("Volt: ");Serial.print(MQ4.getVoltage(false));Serial.println(" V");
Serial.print("R0: ");Serial.print(MQ4.getR0());Serial.println(" Ohm");
Serial.print("CH4: ");Serial.print(CH4,2);Serial.println(" ppm");
Serial.print("LPG: ");Serial.print(LPG,2);Serial.println(" ppm");
Serial.print("CO: ");Serial.print(CO,2);Serial.println(" ppm");
Serial.print("Alcohol: ");Serial.print(Alcohol,2);Serial.println(" ppm");
Serial.print("smoke: ");Serial.print(smoke,2);Serial.println(" ppm");
Serial.println("***************************");
// Calibration setup
MQ4.setR0(3.86018237);
/*
//If the RL value is different from 10K please assign your RL value with the following method:
MQ4.setRL(10);
*/
/***************************** MQ Init ********************************************/
//Remarks: Configure the pin of arduino as input.
/************************************************************************************/
MQ4.init();
/***************************** MQ Init ********************************************/
//Input: setup flag, if this function are on setup will print the headers (Optional - Default value: False)
//Output: print on serial port the information about sensor and sensor readings
//Remarks: Configure the pin of arduino as input.
/************************************************************************************/
MQ4.serialDebug(true);
}
void loop() {
MQ4.update(); // Update data, the arduino will be read the voltage on the analog pin
MQ4.readSensor(); // Sensor will read PPM concentration using the model and a and b values setted before or in the setup
MQ4.serialDebug(); // Will print the table on the serial port
delay(500); //Sampling frequency
}
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