climate-meter-arduino-project.ino

/*
 * References:
 *
 * Datalogger by Arduino: https://www.arduino.cc/en/Tutorial/Datalogger
 * Clock TinyRTC Tutorial: http://www.prometec.net/relojes-rtc/ 
 * DHT22 Sensor Tutorial: http://www.naylampmechatronics.com/blog/40_Tutorial-sensor-de-temperatura-y-humedad-DHT1.html
 * Ethernet Shield V2 Wiki: http://wiki.seeedstudio.com/wiki/Ethernet_Shield_V2.0
 * DFR0026 Light Sensor Guide: https://www.dfrobot.com/wiki/index.php/DFRobot_Ambient_Light_Sensor_(SKU:DFR0026_)
 * DS1307 RTC Tutorial: http://www.geekfactory.mx/tutoriales/tutoriales-arduino/ds1307-en-tinyrtc-con-arduino/
 *
 * Source Libraries:
 * 
 * https://github.com/adafruit/DHT-sensor-library
 * https://github.com/PaulStoffregen/DS1307RTC
 * https://github.com/PaulStoffregen/Time
 * https://github.com/PaulStoffregen/TimeAlarms
 *
 * Docs:
 *
 * https://www.pjrc.com/teensy/td_libs_DS1307RTC.html 
 * https://www.pjrc.com/teensy/td_libs_Time.html
 * https://www.pjrc.com/teensy/td_libs_TimeAlarms.html
 *
*/
#include <Wire.h>
#include <TimeLib.h>
#include <DS1307RTC.h>
#include <TimeAlarms.h>
#include <SPI.h>
#include <SD.h>
#include <DHT.h>
#include <DHT_U.h>
#define DHTTYPE DHT22 
#define ANALOG_PIN_LIGHT_SENSOR 0
#define DIGITAL_PIN_DHT22_SENSOR 2
#define DIGITAL_PIN_LED_RED 3
#define DIGITAL_PIN_LED_GREEN 4  
#define DIGITAL_PIN_LED_BLUE 5
#define CHIP_SELECT 4

String to2Digits(int number) 
{
    return (number >= 0 && number < 10)? "0" + String(number) : String(number);
}

String getDateTime()
{
    tmElements_t datetime;
    if (RTC.read(datetime))
    {
        return String(datetime.Day) + "-" + String(datetime.Month) + "-" + String(tmYearToCalendar(datetime.Year)) + " " +
               to2Digits(datetime.Hour) + ":" + to2Digits(datetime.Minute) + ":" + to2Digits(datetime.Second);
    }
    return "";
}

struct HourOfDay 
{
    int hour, minute, second;
    HourOfDay(int h, int m, int s) : hour(h), minute(m), second(s) {}
    HourOfDay() : hour(0), minute(0), second(0) {}
};

class Log 
{
    private:
    String filename;
    File fileLog;

    public:
    Log(String filename) : filename(filename) {}
    
    boolean logging(String information)
    {
        fileLog = SD.open(filename, FILE_WRITE);
        if (fileLog)
        {
            String datetimeFormated = getDateTime();
            if (datetimeFormated.length() != 0)
            {
                fileLog.println(datetimeFormated + ", " + information);
                Serial.println(datetimeFormated + ", " + information);
                fileLog.close();
                return true;
            }
        }
        return false;
    }

};

class Led
{
    private:
    int pin;

    public:
    Led(int pin = LED_BUILTIN) : pin(pin)
    {
        pinMode(pin, OUTPUT);
    }

    void turnOn()
    {
        digitalWrite(pin, LOW);
    }

    void turnOff()
    {
        digitalWrite(pin, HIGH);
    }
};

class LedDigitalRGB
{
    private:
    Led red, green, blue;

    public:
    
    LedDigitalRGB(int pinRedLed, int pinGreenLed, int pinBlueLed)
    {
        red = Led(pinRedLed);
        green = Led(pinGreenLed);
        blue = Led(pinBlueLed);
    }

    void turnOff()
    {
        red.turnOff();
        green.turnOff();
        blue.turnOff();
    }

    void turnOnRed()
    {
        red.turnOn();
        green.turnOff();
        blue.turnOff();
    }

    void turnOnGreen()
    {
        red.turnOff();
        green.turnOn();
        blue.turnOff();
    }

    void turnOnBlue()
    {
        red.turnOff();
        green.turnOff();
        blue.turnOn();
    }
};

class DFR0026
{
    private:
    int analogPin;

    public:
    DFR0026(int analogPin) : analogPin(analogPin) {}

    int read()
    {
        return analogRead(analogPin);
    }
};

class ClimateMeter 
{
    private:
    const int TIME_MILLIS_SECOND_TO_SLEEP = 1000;
    const int TIME_MINUTES_TO_TAKE_DATA = 30;

    int valueLightSensor;
    float valueHumiditySensor, valueTemperatureSensor;

    DHT dht22;
    DFR0026 lightSensor;
    Log log;
    LedDigitalRGB ledRGBIndicator;

    boolean saveData(int light, int humidity, int temperature) 
    {
        String data = String(light) + ", " + String(humidity) + ", " + String(temperature);
        return log.logging(data);
    }

    public:
    ClimateMeter(DFR0026 lightSensor, DHT dht22, Log log, LedDigitalRGB ledRGBIndicator) 
    : lightSensor(lightSensor), dht22(dht22), log(log), ledRGBIndicator(ledRGBIndicator)  {}

    void setup()
    {
        dht22.begin();
        ledRGBIndicator.turnOff();
    }

    void takeData()
    {
        valueLightSensor = lightSensor.read();
        valueHumiditySensor = dht22.readHumidity();
        valueTemperatureSensor = dht22.readTemperature();

        if(saveData(valueLightSensor, valueHumiditySensor, valueTemperatureSensor)) 
            ledRGBIndicator.turnOnBlue();
        else 
            ledRGBIndicator.turnOnRed();
    
        Alarm.delay(TIME_MILLIS_SECOND_TO_SLEEP);
    }

    void takeDataForAWhile()
    {
        tmElements_t before, after;
        if (!RTC.read(before)) return;
        if (!RTC.read(after)) return;
        int stopMinute = (before.Minute + TIME_MINUTES_TO_TAKE_DATA) % 60;
        while (after.Minute != stopMinute || after.Second <= before.Second)
        {
            takeData();
            if (!RTC.read(after)) return;
        }
    }

    void waitForAlarm()
    {
        ledRGBIndicator.turnOnGreen();
    }
};


DFR0026 dfr0026(ANALOG_PIN_LIGHT_SENSOR);
DHT dht22(DIGITAL_PIN_DHT22_SENSOR, DHTTYPE);
Log logger("datalog.txt");
LedDigitalRGB ledRGB(DIGITAL_PIN_LED_RED, DIGITAL_PIN_LED_GREEN, DIGITAL_PIN_LED_BLUE);
ClimateMeter climateMeter(dfr0026, dht22, logger, ledRGB);

HourOfDay alarms[] = {
    HourOfDay(5, 45, 0),
    HourOfDay(14, 0, 0),
    HourOfDay(19, 0, 0)
};

void setup() 
{   
    Serial.begin(9600);
    while(!Serial);

    setSyncProvider(RTC.get);
    if (timeStatus() != timeSet) Serial.println("Fallo de RTC");
    else Serial.println("Sincronizado con RTC");

    Serial.print("Iniciando SD card...");
    if (SD.begin(CHIP_SELECT)) Serial.println("card iniciada.");
    else Serial.println("SD Card falló, o no esta presente");

    climateMeter.setup();

    int nAlarms = (sizeof(alarms) / sizeof(*alarms));
    for(int i = 0; i < nAlarms; i++) 
    {
        Alarm.alarmRepeat(alarms[i].hour, alarms[i].minute, alarms[i].second, takeDataWrapper);
    }
}

void takeDataWrapper()
{
    climateMeter.takeDataForAWhile();
}

void loop() 
{  
    climateMeter.waitForAlarm();
    String formated = getDateTime();
    if (formated.length() != 0) 
        Serial.println(formated);
    Alarm.delay(1000);
}