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/* Nezávislé riadenie otáčok 3 12V ventilátorov na základe 3 senzorov teploty DS 18B20.
 *  
 *  Popis činnosti:  Ak je teplota čidla do 25.0 °C výkon ventilátora = 0%
 *                   Ak je teplota čidla od 25.0 °C do 35,0 °C výkon ventilátora = 40%
 *                   Ak je teplota čidla od 35.0 °C do 45,0 °C výkon ventilátora = 60%
 *                   Ak je teplota čidla nad 45.0 výkon ventilátora = 100%
 *  Rozsah teplôt a výkonu sa dá meniť ľubovoľne.                
 *  
 *  Zapojenie ventilátorov : + ventilátora     = +12V
 *                           - ventilátora     = -12V
 *                           PWM ventilátora   = pwm fan1, pwm fan2, pwm fan3
 *                         
 *  Zapojenie DS 18B20 :     + čidla     = +5V
 *                           - čidla     = GND
 *                           DATA        = pin3, pin4, pin5
 *
 *  Zapojenie arduino NANO : VIN     =  +12V
 *                           GND     =  -12V                                                                                                
 *  PWM pre ventilátor
 *     0   = 0%
 *     51  = 20%
 *     102 = 40%
 *     153 = 60%
 *     204 = 80%
 *     255 = 100%                       
 */

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

const int fan_victron_1 = 9;    // pwm fan_1 pin09
const int fan_mppt      = 10;   // pwm fan_2 pin10
const int fan_victron_2 = 11;   // pwm fan_3 pin11
int count = 0;
int senzor1;
int senzor2;
int senzor3;

void setup(void)
{
  Serial.begin(9600);
  Serial.print("|...connecting...|");
  Serial.println("");
  Serial.println("");
}

void loop(void) {
  tempsens_victron_1();
  tempsens_mppt();
  tempsens_victron_2();
}

void tempsens_victron_1()
{
#define ONE_WIRE_BUS 3  // DATA senzor teploty DS 18B20
  OneWire oneWire(ONE_WIRE_BUS);
  DallasTemperature sensors(&oneWire);
  
  sensors.begin();
  sensors.requestTemperatures();
  senzor1 = sensors.getTempCByIndex(0);
  
  Serial.print("Victron 1: ");
  Serial.print(sensors.getTempCByIndex(0));
  Serial.print(" ");
  Serial.print("°C");
  Serial.print("   |   ");
    if (senzor1 < 25.0) analogWrite(fan_victron_1, 0);
    if ((senzor1 >= 25.0) && (senzor1 < 35.0)) analogWrite(fan_victron_1, 102);
    if ((senzor1 >= 35.0) && (senzor1 < 45.0)) analogWrite(fan_victron_1, 153);
    if (senzor1 >= 45.0) analogWrite(fan_victron_1, 255);
}

void tempsens_mppt()
{
#define ONE_WIRE_BUS 4  // DATA senzor teploty DS 18B20
  OneWire oneWire(ONE_WIRE_BUS);
  DallasTemperature sensors(&oneWire);
  
  sensors.begin();
  sensors.requestTemperatures();
  senzor2 = sensors.getTempCByIndex(0);
  
  Serial.print("MPPT: ");
  Serial.print(sensors.getTempCByIndex(0));
  Serial.print(" ");
  Serial.print("°C");
  Serial.print("   |   ");
    if (senzor2 < 25.0) analogWrite(fan_mppt, 0);
    if ((senzor2 >= 25.0) && (senzor2 < 35.0)) analogWrite(fan_mppt, 102);
    if ((senzor2 >= 35.0) && (senzor2 < 45.0)) analogWrite(fan_mppt, 153);
    if (senzor2 >= 45.0) analogWrite(fan_mppt, 255);
}

void tempsens_victron_2()
{
#define ONE_WIRE_BUS 5  // DATA senzor teploty DS 18B20
  OneWire oneWire(ONE_WIRE_BUS);
  DallasTemperature sensors(&oneWire);
  
  sensors.begin();
  sensors.requestTemperatures();
  senzor3 = sensors.getTempCByIndex(0);
  
  Serial.print("Victron 2: ");
  Serial.print(sensors.getTempCByIndex(0));
  Serial.print(" ");
  Serial.print("°C");
  Serial.print("   |   ");
  Serial.println("");
    if (senzor3 < 25.0) analogWrite(fan_victron_2, 0);
    if ((senzor3 >= 25.0) && (senzor3 < 35.0)) analogWrite(fan_victron_2, 102);
    if ((senzor3 >= 35.0) && (senzor3 < 45.0)) analogWrite(fan_victron_2, 153);
    if (senzor3 >= 45.0) analogWrite(fan_victron_2, 255);
}