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Updated MQ-5

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miguel5612 2020-03-26 12:41:20 -05:00
parent 1311d9446d
commit 50342b0bc6
2 changed files with 48 additions and 54 deletions
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2
examples/MQ-4/MQ-4.ino
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@ -37,7 +37,7 @@ void setup() {
//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
MQ4.setA(1012.7); MQ4.setB(-2.786); // Configurate the ecuation values to get CH4 concentration
/*
Exponential regression:
Gas | a | b

98
examples/MQ-5/MQ-5.ino
View File

@ -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.
*/
@ -17,66 +21,56 @@
#include <MQUnifiedsensor.h>
//Definitions
#define placa "Arduino UNO"
#define Voltage_Resolution 5
#define pin A0 //Analog input 0 of your arduino
#define type 5 //MQ5
#define type "MQ-5" //MQ5
#define ADC_Bit_Resolution 10 // For arduino UNO/MEGA/NANO
//#define calibration_button 13 //Pin to calibrate your sensor
//Declare Sensor
MQUnifiedsensor MQ5(pin, type);
//Variables
float H2, LPG, CH4, CO, smoke;
MQUnifiedsensor MQ5(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.
************************************************************************************/
MQ5.inicializar();
//pinMode(calibration_button, INPUT);
//Set math model to calculate the PPM concentration and the value of constants
MQ5.setRegressionMethod("Exponential"); //_PPM = a*ratio^b
MQ5.setA(1163.8); MQ5.setB(-3.874); // Configurate the ecuation values to get H2 concentration
/*
Exponential regression:
Gas | a | b
H2 | 1163.8 | -3.874
LPG | 80.897 | -2.431
CH4 | 177.65 | -2.56
CO | 491204 | -5.826
Alcohol| 97124 | -4.918
*/
// Calibration setup
MQ5.setR0(71.100304);
/*
//If the RL value is different from 10K please assign your RL value with the following method:
MQ5.setRL(10);
*/
/***************************** MQ Init ********************************************/
//Remarks: Configure the pin of arduino as input.
/************************************************************************************/
MQ5.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.
/************************************************************************************/
MQ5.serialDebug(true);
}
void loop() {
MQ5.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:
MQ5.setRL(10);
*/
/*
//Rutina de calibracion - Uncomment if you need (setup too and header)
if(calibration_button)
{
float R0 = MQ5.calibrate();
MQ5.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 = MQ5.readSensor("", true); // Return H2 concentration
// Options, uncomment where you need
H2 = MQ5.readSensor("H2"); // Return H2 concentration
LPG = MQ5.readSensor("LPG"); // Return LPG concentration
CH4 = MQ5.readSensor("CH4"); // Return CH4 concentration
CO = MQ5.readSensor("CO"); // Return CO concentration
smoke = MQ5.readSensor("smoke"); // Return smoke concentration
Serial.println("***************************");
Serial.println("Lectures for MQ-5");
Serial.print("Volt: ");Serial.print(MQ5.getVoltage(false));Serial.println(" V");
Serial.print("R0: ");Serial.print(MQ5.getR0());Serial.println(" Ohm");
Serial.print("H2: ");Serial.print(H2,2);Serial.println(" ppm");
Serial.print("LPG: ");Serial.print(LPG,2);Serial.println(" ppm");
Serial.print("CH4: ");Serial.print(CH4,2);Serial.println(" ppm");
Serial.print("CO: ");Serial.print(CO,2);Serial.println(" ppm");
Serial.print("smoke: ");Serial.print(smoke,2);Serial.println(" ppm");
Serial.println("***************************");
MQ5.update(); // Update data, the arduino will be read the voltage on the analog pin
MQ5.readSensor(); // Sensor will read PPM concentration using the model and a and b values setted before or in the setup
MQ5.serialDebug(); // Will print the table on the serial port
delay(500); //Sampling frequency
}