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miguel5612 2020-03-26 13:11:30 -05:00
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examples/MQ-131/MQ-131.ino
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@ -1,7 +1,7 @@
/* /*
MQUnifiedsensor Library - reading an MQ9 MQUnifiedsensor Library - reading an MQ131
Demonstrates the use a MQ9 sensor. Demonstrates the use a MQ131 sensor.
Library originally added 01 may 2019 Library originally added 01 may 2019
by Miguel A Califa, Yersson Carrillo, Ghiordy Contreras, Mario Rodriguez by Miguel A Califa, Yersson Carrillo, Ghiordy Contreras, Mario Rodriguez
@ -24,52 +24,52 @@
#define placa "Arduino UNO" #define placa "Arduino UNO"
#define Voltage_Resolution 5 #define Voltage_Resolution 5
#define pin A0 //Analog input 0 of your arduino #define pin A0 //Analog input 0 of your arduino
#define type "MQ-8" //MQ9 #define type "MQ-131" //MQ131
#define ADC_Bit_Resolution 10 // For arduino UNO/MEGA/NANO #define ADC_Bit_Resolution 10 // For arduino UNO/MEGA/NANO
//#define calibration_button 13 //Pin to calibrate your sensor //#define calibration_button 13 //Pin to calibrate your sensor
//Declare Sensor //Declare Sensor
MQUnifiedsensor MQ9(placa, Voltage_Resolution, ADC_Bit_Resolution, pin, type); MQUnifiedsensor MQ131(placa, Voltage_Resolution, ADC_Bit_Resolution, pin, type);
void setup() { void setup() {
//Init the serial port communication - to debug the library //Init the serial port communication - to debug the library
Serial.begin(9600); //Init serial port Serial.begin(9600); //Init serial port
//Set math model to calculate the PPM concentration and the value of constants //Set math model to calculate the PPM concentration and the value of constants
MQ9.setRegressionMethod("Exponential"); //_PPM = a*ratio^b MQ131.setRegressionMethod("Exponential"); //_PPM = a*ratio^b
MQ9.setA(1000.5); MQ9.setB(-2.186); // Configurate the ecuation values to get LPG concentration MQ131.setA(23.943); MQ131.setB(-1.11); // Configurate the ecuation values to get O3 concentration
/* /*
Exponential regression: Exponential regression:
GAS | a | b GAS | a | b
LPG | 1000.5 | -2.186 NOx | -462.43 | -2.204
CH4 | 4269.6 | -2.648 CL2 | 47.209 | -1.186
CO | 599.65 | -2.244 O3 | 23.943 | -1.11
*/ */
// Calibration setup // Calibration setup
MQ9.setR0(9.42857143); MQ131.setR0(385.40);
/* /*
//If the RL value is different from 10K please assign your RL value with the following method: //If the RL value is different from 10K please assign your RL value with the following method:
MQ9.setRL(10); MQ131.setRL(10);
*/ */
/***************************** MQ Init ********************************************/ /***************************** MQ Init ********************************************/
//Remarks: Configure the pin of arduino as input. //Remarks: Configure the pin of arduino as input.
/************************************************************************************/ /************************************************************************************/
MQ9.init(); MQ131.init();
/***************************** MQ Init ********************************************/ /***************************** MQ Init ********************************************/
//Input: setup flag, if this function are on setup will print the headers (Optional - Default value: False) //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 //Output: print on serial port the information about sensor and sensor readings
//Remarks: Configure the pin of arduino as input. //Remarks: Configure the pin of arduino as input.
/************************************************************************************/ /************************************************************************************/
MQ9.serialDebug(true); MQ131.serialDebug(true);
} }
void loop() { void loop() {
MQ9.update(); // Update data, the arduino will be read the voltage on the analog pin MQ131.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 MQ131.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 MQ131.serialDebug(); // Will print the table on the serial port
delay(500); //Sampling frequency delay(500); //Sampling frequency
} }