/* MQUnifiedsensor Library - reading an MQ4 Demonstrates the use a MQ303 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 //Definitions #define pin A0 //Analog input 0 of your arduino #define type 303 //MQ303 //#define calibration_button 13 //Pin to calibrate your sensor //Declare Sensor MQUnifiedsensor MQ303(pin, type); //Variables float Iso_butano, Hydrogeno, Ethanol; void setup() { Serial.begin(9600); //Init serial port //init the sensor /***************************** MQInicializar**************************************** Input: pin, type Output: Remarks: This function create the sensor object. ************************************************************************************/ MQ303.inicializar(); //pinMode(calibration_button, INPUT); } void loop() { MQ303.update(); /* //Si el valor de RL es diferente a 10K por favor asigna tu valor de RL con el siguiente metodo: MQ303.setRL(10); */ /* //Rutina de calibracion - Uncomment if you need (setup too and header) if(calibration_button) { float R0 = MQ303.calibrate(); MQ303.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 = MQ303.readSensor("", true); // Return Isobutano concentration // Options, uncomment where you need Iso_butano = MQ303.readSensor("Iso_butano"); // Return Iso_butano concentration Hydrogeno = MQ303.readSensor("Hydrogeno"); // Return Hydrogeno concentration Ethanol = MQ303.readSensor("Ethanol"); // Return Ethanol concentration Serial.println("***************************"); Serial.println("Lectures for MQ-303"); Serial.print("Volt: ");Serial.print(MQ303.getVoltage(false));Serial.println(" V"); Serial.print("R0: ");Serial.print(MQ303.getR0());Serial.println(" Ohm"); Serial.print("Iso_butano: ");Serial.print(Iso_butano,2);Serial.println(" ppm"); Serial.print("Hydrogeno: ");Serial.print(Hydrogeno,2);Serial.println(" ppm"); Serial.print("Ethanol: ");Serial.print(Ethanol,2);Serial.println(" ppm"); Serial.println("***************************"); }