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Added MQ-9 All
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miguel5612
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@ -75,7 +75,7 @@ void setup() {
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/************************************************************************************/
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MQ4.init();
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Serial.println("*************************** Lectures from MQ-board ***************************");
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Serial.println("*************** Lectures from MQ-4 **********************");
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Serial.println("| LPG | CH4 | CO | Alcohol | Smoke |");
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}
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117
examples/MQ-4-LINEAR/MQ-4-LINEAR.ino
Normal file
117
examples/MQ-4-LINEAR/MQ-4-LINEAR.ino
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@ -0,0 +1,117 @@
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/*
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MQUnifiedsensor Library - reading an MQ4
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Demonstrates the use a MQ4 sensor.
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Library originally added 01 may 2019
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by Miguel A Califa, Yersson Carrillo, Ghiordy Contreras, Mario Rodriguez
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Added example
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modified 23 May 2019
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by Miguel Califa
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Updated library usage
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modified 26 March 2020
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by Miguel Califa
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This example code is in the public domain.
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*/
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//Include the library
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#include <MQUnifiedsensor.h>
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//Definitions
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#define placa "Arduino UNO"
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#define Voltage_Resolution 5
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#define pin A0 //Analog input 0 of your arduino
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#define type "MQ-4" //MQ4
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#define ADC_Bit_Resolution 10 // For arduino UNO/MEGA/NANO
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#define RatioMQ4CleanAir 4.4 //RS / R0 = 4.4 ppm
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//#define calibration_button 13 //Pin to calibrate your sensor
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//Declare Sensor
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MQUnifiedsensor MQ4(placa, Voltage_Resolution, ADC_Bit_Resolution, pin, type);
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void setup() {
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//Init the serial port communication - to debug the library
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Serial.begin(9600); //Init serial port
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//Set math model to calculate the PPM concentration and the value of constants
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MQ4.setRegressionMethod(0); //_PPM = a*ratio + b
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/***************************** MQ CAlibration ********************************************/
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// Explanation:
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// In this routine the sensor will measure the resistance of the sensor supposing before was pre-heated
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// and now is on clean air (Calibration conditions), and it will setup R0 value.
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// We recomend execute this routine only on setup or on the laboratory and save on the eeprom of your arduino
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// This routine not need to execute to every restart, you can load your R0 if you know the value
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// Acknowledgements: https://jayconsystems.com/blog/understanding-a-gas-sensor
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Serial.print("Calibrating please wait.");
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float calcR0 = 0;
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for(int i = 0; i<=10; i ++)
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{
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MQ4.update(); // Update data, the arduino will be read the voltage on the analog pin
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calcR0 += MQ4.calibrate(RatioMQ4CleanAir);
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Serial.print(".");
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}
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MQ4.setR0(calcR0/10);
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Serial.println(" done!.");
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if(isinf(calcR0)) {Serial.println("Warning: Conection issue founded, R0 is infite (Open circuit detected) please check your wiring and supply"); while(1);}
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if(calcR0 == 0){Serial.println("Warning: Conection issue founded, R0 is zero (Analog pin with short circuit to ground) please check your wiring and supply"); while(1);}
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/***************************** MQ CAlibration ********************************************/
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/*
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//If the RL value is different from 10K please assign your RL value with the following method:
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MQ4.setRL(10);
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*/
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/***************************** MQ Init ********************************************/
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//Input: setup flag, if this function are on setup will print the headers (Optional - Default value: False)
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//Output: print on serial port the information about sensor and sensor readings
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//Remarks: Configure the pin of arduino as input.
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/************************************************************************************/
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MQ4.init();
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Serial.println("*************************** Lectures from MQ-board ***************************");
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Serial.println("| LPG | CH4 | CO | Alcohol | Smoke |");
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}
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void loop() {
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MQ4.update(); // Update data, the arduino will be read the voltage on the analog pin
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/*
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Exponential regression:
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Gas | a | b
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LPG | 3811.9 | -3.113
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CH4 | 1012.7 | -2.786
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CO | 200000000000000 | -19.05
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Alcohol| 60000000000 | -14.01
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smoke | 30000000 | -8.308
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*/
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MQ4.setA(3811.9); MQ4.setB(-3.113); // Configurate the ecuation values to get CH4 concentration
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float LPG = MQ4.readSensor(); // Sensor will read PPM concentration using the model and a and b values setted before or in the setup
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MQ4.setA(1012.7); MQ4.setB(-2.786); // Configurate the ecuation values to get CH4 concentration
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float CH4 = MQ4.readSensor(); // Sensor will read PPM concentration using the model and a and b values setted before or in the setup
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MQ4.setA(200000000000000); MQ4.setB(-19.05); // Configurate the ecuation values to get CH4 concentration
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float CO = MQ4.readSensor(); // Sensor will read PPM concentration using the model and a and b values setted before or in the setup
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MQ4.setA(60000000000); MQ4.setB(-14.01); // Configurate the ecuation values to get CH4 concentration
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float Alcohol = MQ4.readSensor(); // Sensor will read PPM concentration using the model and a and b values setted before or in the setup
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MQ4.setA(30000000); MQ4.setB(-8.308); // Configurate the ecuation values to get CH4 concentration
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float Smoke = MQ4.readSensor(); // Sensor will read PPM concentration using the model and a and b values setted before or in the setup
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Serial.print("| "); Serial.print(LPG);
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Serial.print(" | "); Serial.print(CH4);
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Serial.print(" | "); Serial.print(CO);
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Serial.print(" | "); Serial.print(Alcohol);
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Serial.print(" | "); Serial.print(Smoke);
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Serial.println(" |");
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delay(500); //Sampling frequency
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}
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106
examples/MQ-9-ALL/MQ-9-ALL.ino
Normal file
106
examples/MQ-9-ALL/MQ-9-ALL.ino
Normal file
@ -0,0 +1,106 @@
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/*
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MQUnifiedsensor Library - reading an MQ9
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Demonstrates the use a MQ9 sensor.
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Library originally added 01 may 2019
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by Miguel A Califa, Yersson Carrillo, Ghiordy Contreras, Mario Rodriguez
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Added example
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modified 23 May 2019
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by Miguel Califa
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Updated library usage
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modified 26 March 2020
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by Miguel Califa
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This example code is in the public domain.
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*/
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//Include the library
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#include <MQUnifiedsensor.h>
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//Definitions
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#define placa "Arduino UNO"
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#define Voltage_Resolution 5
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#define pin A0 //Analog input 0 of your arduino
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#define type "MQ-9" //MQ9
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#define ADC_Bit_Resolution 10 // For arduino UNO/MEGA/NANO
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#define RatioMQ9CleanAir 9.6 //RS / R0 = 9.6 ppm
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//#define calibration_button 13 //Pin to calibrate your sensor
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//Declare Sensor
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MQUnifiedsensor MQ9(placa, Voltage_Resolution, ADC_Bit_Resolution, pin, type);
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void setup() {
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//Init the serial port communication - to debug the library
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Serial.begin(9600); //Init serial port
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//Set math model to calculate the PPM concentration and the value of constants
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MQ9.setRegressionMethod(1); //_PPM = a*ratio^b
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/***************************** MQ CAlibration ********************************************/
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// Explanation:
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// In this routine the sensor will measure the resistance of the sensor supposing before was pre-heated
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// and now is on clean air (Calibration conditions), and it will setup R0 value.
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// We recomend execute this routine only on setup or on the laboratory and save on the eeprom of your arduino
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// This routine not need to execute to every restart, you can load your R0 if you know the value
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// Acknowledgements: https://jayconsystems.com/blog/understanding-a-gas-sensor
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Serial.print("Calibrating please wait.");
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float calcR0 = 0;
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for(int i = 0; i<=10; i ++)
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{
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MQ9.update(); // Update data, the arduino will be read the voltage on the analog pin
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calcR0 += MQ9.calibrate(RatioMQ9CleanAir);
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Serial.print(".");
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}
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MQ9.setR0(calcR0/10);
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Serial.println(" done!.");
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if(isinf(calcR0)) {Serial.println("Warning: Conection issue founded, R0 is infite (Open circuit detected) please check your wiring and supply"); while(1);}
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if(calcR0 == 0){Serial.println("Warning: Conection issue founded, R0 is zero (Analog pin with short circuit to ground) please check your wiring and supply"); while(1);}
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/***************************** MQ CAlibration ********************************************/
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/*
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//If the RL value is different from 10K please assign your RL value with the following method:
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MQ9.setRL(10);
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*/
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/***************************** MQ Init ********************************************/
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//Input: setup flag, if this function are on setup will print the headers (Optional - Default value: False)
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//Output: print on serial port the information about sensor and sensor readings
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//Remarks: Configure the pin of arduino as input.
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/************************************************************************************/
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MQ9.init();
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Serial.println("** Lectures from MQ-9 ****");
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Serial.println("| LPG | CH4 | CO |");
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}
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void loop() {
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MQ9.update(); // Update data, the arduino will be read the voltage on the analog pin
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/*
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Exponential regression:
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GAS | a | b
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LPG | 1000.5 | -2.186
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CH4 | 4269.6 | -2.648
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CO | 599.65 | -2.244
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*/
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MQ9.setA(1000.5); MQ9.setB(-2.186); // Configurate the ecuation values to get LPG concentration
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float LPG = MQ9.readSensor(); // Sensor will read PPM concentration using the model and a and b values setted before or in the setup
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MQ9.setA(4269.6); MQ9.setB(-2.648); // Configurate the ecuation values to get LPG concentration
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float CH4 = MQ9.readSensor(); // Sensor will read PPM concentration using the model and a and b values setted before or in the setup
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MQ9.setA(599.65); MQ9.setB(-2.244); // Configurate the ecuation values to get LPG concentration
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float CO = MQ9.readSensor(); // Sensor will read PPM concentration using the model and a and b values setted before or in the setup
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Serial.print("| "); Serial.print(LPG);
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Serial.print(" | "); Serial.print(CH4);
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Serial.print(" | "); Serial.print(CO);
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Serial.println(" |");
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delay(500); //Sampling frequency
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}
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