Sensor Calibration rev_01

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    - Project: Sensor Calibration
    - Source Code NOT compiled for: Arduino Uno
    - Source Code created on: 2024-10-14 19:43:46

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/****** SYSTEM REQUIREMENTS *****/
/****** SYSTEM REQUIREMENT 1 *****/
    /* Messenger app */
/****** SYSTEM REQUIREMENT 2 *****/
    /* The messenger app will feature a dashboard */
    /* displaying sensor data, allowing users to */
    /* visualize trends over time. It will support data */
    /* logging for historical analysis and reporting. */
/****** END SYSTEM REQUIREMENTS *****/

/****** DEFINITION OF LIBRARIES *****/
#include <MQUnifiedsensor.h>    //https://github.com/miguel5612/MQSensorsLib

/****** FUNCTION PROTOTYPES *****/
void setup(void);
void loop(void);

/***** DEFINITION OF DIGITAL INPUT PINS *****/
const uint8_t Msd_MQ6_DOUT_PIN_D2       = 2;
const uint8_t Msd_MQ6_DOUT_PIN_D3       = 3;

/***** DEFINITION OF ANALOG INPUT PINS *****/
const uint8_t Msd_MQ6_AOUT_PIN_A0       = A0;
const uint8_t Msd_MQ6_AOUT_PIN_A1       = A1;

/****** DEFINITION OF LIBRARIES CLASS INSTANCES*****/
// Definitions for the MQ6 sensor
#define placa "Arduino UNO" // Define the board type
#define Voltage_Resolution 5 // Voltage resolution
#define ADC_Bit_Resolution 10 // ADC bit resolution
#define RatioMQ6CleanAir 10 // Ratio for clean air calibration

// Declare Sensor using MQUnifiedsensor constructor
MQUnifiedsensor MQ6(placa, Voltage_Resolution, ADC_Bit_Resolution, Msd_MQ6_AOUT_PIN_A0, "MQ-6");

// Variables for logging data
float sensorValue = 0; // Variable to store sensor value
unsigned long previousMillis = 0; // Store the last time data was logged
const long interval = 1000; // Interval for logging data (1 second)

void setup(void)
{
    // put your setup code here, to run once:
    pinMode(Msd_MQ6_DOUT_PIN_D2, INPUT_PULLUP);
    pinMode(Msd_MQ6_DOUT_PIN_D3, INPUT_PULLUP);
    pinMode(Msd_MQ6_AOUT_PIN_A0, INPUT);
    pinMode(Msd_MQ6_AOUT_PIN_A1, INPUT);

    // Initialize the sensor
    MQ6.init(); // Initialize the MQ6 sensor

    // Calibration
    Serial.begin(9600); // Start serial communication
    Serial.print("Calibrating please wait.");
    float calcR0 = 0;
    for(int i = 0; i < 10; i++) {
        MQ6.update(); // Update sensor data
        calcR0 += MQ6.calibrate(RatioMQ6CleanAir); // Calibrate and accumulate R0
        Serial.print(".");
    }
    MQ6.setR0(calcR0 / 10); // Set the average R0 value
    Serial.println(" done!");

    if (isinf(calcR0) || calcR0 == 0) {
        Serial.println("Warning: Connection issue detected.");
        while (1); // Stop execution if there's an issue
    }
}

void loop(void)
{
    // put your main code here, to run repeatedly:
    MQ6.update(); // Update sensor data
    MQ6.readSensor(); // Read the sensor value
    MQ6.serialDebug(); // Print debug information to serial

    // Log data to Serial every second
    unsigned long currentMillis = millis();
    if (currentMillis - previousMillis >= interval) {
        previousMillis = currentMillis; // Save the last time data was logged
        sensorValue = MQ6.getPPM(); // Get the sensor value in PPM
        Serial.print("Sensor Value (PPM): ");
        Serial.println(sensorValue); // Print the sensor value to Serial
        // Here you could add code to visualize trends over time
        // and support data logging for historical analysis
    }

    delay(500); // Delay for sampling frequency
}

/* END CODE */