MQSensorsLib/examples/Alcoholimeter/Alcoholimeter.ino

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/*
MQUnifiedsensor Library - implementing an alcoholimeter
Demonstrates the use a MQ3 sensor.
Library originally added 01 may 2019
by Miguel A Califa, Yersson Carrillo, Ghiordy Contreras, Mario Rodriguez
Added example
modified 23 May 2019
by Miguel Califa
This example code is in the public domain.
*/
//Include the library
#include <MQUnifiedsensor.h>
//Definitions
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#define pin A3 //Analog input 0 of your arduino
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#define type 3 //MQ3
//Declare Sensor
MQUnifiedsensor MQ3(pin, type);
void setup() {
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Serial.begin(9600);
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//init the sensor
/***************************** MQInicializar****************************************
Input: pin, type
Output:
Remarks: This function create the sensor object.
************************************************************************************/
MQ3.inicializar();
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float RoCleanAir = MQ3.calibrate();
Serial.print("R0 preconfigurado: ");
Serial.println(MQ3.getR0());
Serial.print("R0 clean air: ");
Serial.println(RoCleanAir);
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//MQ3.setR0(RoCleanAir);
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}
void loop() {
/***************************** 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
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int lecture = MQ3.readSensor("", true); // Return Alcohol concentration
/*
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int gL = lecture/1000;
Serial.print("Alcohol ppm measured: ");
Serial.print(lecture);
Serial.println("ppm");
Serial.print("Alcohol gL measured: ");
Serial.print(gL);
Serial.println("g/L");
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*/
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}