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63 lines
2.1 KiB
C++
63 lines
2.1 KiB
C++
/*
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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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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 pin A0 //Analog input 0 of your arduino
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#define type 9 //MQ9
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//Declare Sensor
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MQUnifiedsensor MQ9(pin, type);
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//Variables
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float CO, CH4, LPG;
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void setup() {
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//init the sensor
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/***************************** MQInicializar****************************************
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Input: pin, type
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Output:
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Remarks: This function create the sensor object.
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************************************************************************************/
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MQ9.inicializar();
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}
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void loop() {
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MQ9.update(); // Update data, the arduino will be read the voltaje in the analog pin
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/***************************** MQReadSensor ****************************************
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Input: Gas - Serial print flag
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Output: Value in PPM
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Remarks: This function use readPPM to read the value in PPM the gas in the air.
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************************************************************************************/
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//Read the sensor and print in serial port
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//Lecture will be saved in lecture variable
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//float lecture = MQ9.readSensor("", true); // Return LPG concentration
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// Options, uncomment where you need
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LPG = MQ9.readSensor("LPG"); // Return LPG concentration
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CH4 = MQ9.readSensor("CH4"); // Return CH4 concentration
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CO = MQ9.readSensor("CO"); // Return CO concentration
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Serial.println("***************************");
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Serial.println("Lectures for MQ-9");
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Serial.print("Volt: ");Serial.print(MQ9.getVoltage(false));Serial.println(" V");
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Serial.print("R0: ");Serial.print(MQ9.getR0());Serial.println(" Ohm");
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Serial.print("CO: ");Serial.print(CO,2);Serial.println(" ppm");
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Serial.print("LPG: ");Serial.print(LPG,2);Serial.println(" ppm");
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Serial.print("CH4: ");Serial.print(CH4,2);Serial.println(" ppm");
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Serial.println("***************************");
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}
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