// Programa : Leitor temperatura sensores DS18B20
// Alterações : Arduino e Cia
// Este programa usa o endereço físico de cada sensor para mostrar as
// informações de temperatura no Serial Monitor

#include <OneWire.h>
#include <DallasTemperature.h>

//Carrega a biblioteca LiquidCrystal
#include <LiquidCrystal_I2C.h>




// Conectar o pino central dos sensores ao pino 10 do Arduino
#define ONE_WIRE_BUS 10

// Setup a oneWire instance to communicate with any OneWire devices
OneWire oneWire(ONE_WIRE_BUS);


volatile int  flow_frequency;  // Measures flow meter pulses
unsigned int  l_hour;          // Calculated litres/hour
unsigned char flowmeter = 2;  // Flow Meter Pin number
unsigned long currentTime;
unsigned long cloopTime;

float tempMin = 999;
float tempMax = 0;

// Pass our oneWire reference to Dallas Temperature.
DallasTemperature sensors(&oneWire);
DeviceAddress S1 = { 0x28, 0xEE, 0x05, 0xC5, 0x21, 0x16, 0x02, 0x8B };
DeviceAddress S2 = { 0x28, 0xEE, 0xE7, 0x34, 0x24, 0x16, 0x02, 0x19 };
DeviceAddress S3 = { 0x28, 0xEE, 0xC3, 0x39, 0x27, 0x16, 0x01, 0x65 };
DeviceAddress S4 = { 0x28, 0xEE, 0x97, 0xA1, 0x27, 0x16, 0x01, 0x12 };

//Define os pinos que serão utilizados para ligação ao display
LiquidCrystal_I2C lcd(0x3F,16,2);

void flow ()                  // Interruot function
{
   flow_frequency++;
}

void setup(void)
{
  // start serial port
  Serial.begin(9600);
  // Start up the library
  sensors.begin();
  // set the resolution to 10 bit (good enough?)
  sensors.setResolution(S1, 10);
  sensors.setResolution(S2, 10);
  sensors.setResolution(S3, 10);
  sensors.setResolution(S4, 10);
  lcd.init();
  lcd.backlight();
  lcd.begin(16, 2);

  pinMode(flowmeter, INPUT);
  Serial.begin(9600);
  attachInterrupt(0, flow, RISING); // Setup Interrupt
                                     // see http://arduino.cc/en/Reference/attachInterrupt
  sei();                            // Enable interrupts
  currentTime = millis();
  cloopTime = currentTime;
}

void printTemperature(DeviceAddress deviceAddress)
{
  float tempC = sensors.getTempC(deviceAddress);
  if (tempC == -127.00)
  {
    Serial.print("Erro ao ler temperatura !");
  }
  else
  {
    Serial.print("C: ");
    Serial.print(tempC);
    Serial.print(" F: ");
    Serial.print(DallasTemperature::toFahrenheit(tempC));
  }
}

float corrigeTemp(int sensor, float tempValor){
  float tempCorrigida = 0;
  if(sensor == 1){
    tempCorrigida = 1.0065*tempValor + 0.9512;
  }

  if(sensor == 2){
    tempCorrigida = 1.0011*tempValor + 1.0846;
  }

  if(sensor == 3){
    tempCorrigida = 1.0032*tempValor + 1.1469;
  }

  if(sensor == 4){
    tempCorrigida = 1.007*tempValor + 0.8989;
  }

  return tempCorrigida;
}

void loop(void)
{


  sensors.requestTemperatures();
  float tempC = sensors.getTempC(S1);

  tempC = corrigeTemp(1, tempC);

  // Atualiza temperaturas minima e maxima
  if (tempC < tempMin)
  {
    tempMin = tempC;
  }
  if (tempC > tempMax)
  {
    tempMax = tempC;
  }

  //////////////
  //Limpa a tela

  tempC = sensors.getTempC(S1);
  tempC = corrigeTemp(1, tempC);

  float tempC2 = sensors.getTempC(S2);
  tempC2 = corrigeTemp(2, tempC2);

  float tempC3 = sensors.getTempC(S3);
  tempC3 = corrigeTemp(3, tempC3);

  float tempC4 = sensors.getTempC(S4);
  tempC4 = corrigeTemp(4, tempC4);

  lcd.clear();
  lcd.setCursor(0,0);
  lcd.print("T1:");
  lcd.print(tempC);
  lcd.print("T2:");
  lcd.print(tempC2);
  lcd.setCursor(0,1);
  lcd.print("T3:");
  lcd.print(tempC3);
  lcd.print("T4:");
  lcd.print(tempC4);
  delay(5000);
   currentTime = millis();
   // Every second, calculate and print litres/hour
   if(currentTime >= (cloopTime + 1000))
   {
      cloopTime = currentTime;              // Updates cloopTime
      // Pulse frequency (Hz) = 7.5Q, Q is flow rate in L/min. (Results in +/- 3% range)
      l_hour = (flow_frequency * 60 / 7.5); // (Pulse frequency x 60 min) / 7.5Q = flow rate in L/hour
      flow_frequency = 0;                   // Reset Counter
      l_hour = 0.5216*l_hour+6.3494;
      Serial.print(l_hour, DEC);            // Print litres/hour
      Serial.println(" L/hour");
      lcd.clear();
      lcd.setCursor(0,0);
      lcd.print(l_hour, DEC);
      lcd.print(" L/hour");
      delay(5000);
   }


}