/*
 * Voici le code Arduino pour le thermocouple K-Type MAX6675 avec relais et affichage. La broche de sortie 10 est connectée au relais. Lorsque la température atteint la valeur souhaitée, la broche 10 active le relais.
 * 
 * Ce code a été expliqué dans notre vidéo à l'adresse https://youtu.be/cD5oOu4N_AE
 * 
 * Écrit par Ahmad Nejrabi pour Robojax Video 
 * Date : 9 décembre 2017, à Ajax, Ontario, Canada 
 * Autorisation accordée pour partager ce code à condition que cette note soit conservée avec le code. 
 * Avertissement : ce code est "EN L'ÉTAT" et uniquement à des fins éducatives. 
 * 
 * /
 * 
 * // Cet exemple est dans le domaine public. Profitez-en ! 
 * // www.ladyada.net/learn/sensors/thermocouple
 */
#include "max6675.h"


int thermoDO = 4;
int thermoCS = 5;
int thermoCLK = 6;


MAX6675 thermocouple(thermoCLK, thermoCS, thermoDO);
int vccPin = 3;
int gndPin = 2;

void setup() {
  Serial.begin(9600);
 // Utilisez les broches Arduino
  pinMode(vccPin, OUTPUT); digitalWrite(vccPin, HIGH);
  pinMode(gndPin, OUTPUT); digitalWrite(gndPin, LOW);
    pinMode(10, OUTPUT); // définir la broche 10 comme sortie

  Serial.println("Robojax: MAX6675 test");
 // attendre que la puce MAX se stabilise
  delay(500);
}

void loop() {
 // test de lecture basique, il suffit d'afficher la température actuelle


   Serial.print("C = ");
   Serial.println(thermocouple.readCelsius());
   Serial.print("F = ");
   Serial.println(thermocouple.readFahrenheit());

 // Si la température dépasse 80,0°C, mettez le relais en marche.
   if(thermocouple.readCelsius() > 80.00){
    digitalWrite(10, LOW); // mettre la broche 10 à l'état bas
   }else{
    digitalWrite(10, HIGH); // mettre la broche 10 à HIGH
   }


   delay(1000);
}

++
/*
 * Library from: // www.ladyada.net/learn/sensors/thermocouple
 * 
 * This is Arduino code to measure MAX6675 Thermocouple K-Type sensor
 * and control relay as heater or cooler
 * 
 * Watch Video instruction for this code: https://youtu.be/dVh77wT-4Ao
 * 
 * Written by Ahmad Shamshiri on May 20, 2020 in Ajax, Ontario, Canada
 * www.robojax.com
 * 
 * Get this code and other Arduino codes from Robojax.com.
 * Learn Arduino step by step in a structured course with all material, wiring diagrams, and libraries
 * all in one place. Purchase My course on Udemy.com http://robojax.com/L/?id=62
 * 
 * If you found this tutorial helpful, please support me so I can continue creating 
 * content like this. 
 * 
 * or make a donation using PayPal http://robojax.com/L/?id=64
 * Related videos:
 * Introduction to MAX6675 K-Type: https://youtu.be/VGqONmUinqA
 * Using MAX6675 K-Type thermocouple with LED display: https://youtu.be/cD5oOu4N_AE
 * Using MAX6675 K-Type thermocouple with LCD1602-I2C: https://youtu.be/BlhpktgPdKs
 * Using 2 or more MAX6675 K-Type thermocouples: https://youtu.be/c90NszbNG8c
 * Using MAX6675 K-Type thermocouple as heater or cooler controller: [this video]
 *  * This code is "AS IS" without warranty or liability. Free to be used as long as you keep this note intact.* 
 * This code has been downloaded from Robojax.com
 *     This program is free software: you can redistribute it and/or modify
 *     it under the terms of the GNU General Public License as published by
 *     the Free Software Foundation, either version 3 of the License, or
 *     (at your option) any later version.
 * 
 *     This program is distributed in the hope that it will be useful,
 *     but WITHOUT ANY WARRANTY; without even the implied warranty of
 *     MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
 *     GNU General Public License for more details.
 * 
 *     You should have received a copy of the GNU General Public License
 *     along with this program.  If not, see <https://www.gnu.org/licenses/>.
 */


#include "max6675.h"
 // Robojax.com heater/cooler with MAX6675 Thermocoupler
int GNDpin = 2;
int VCCpin =3;
int thermoCLK = 4;
int thermoCS = 5;
int thermoDO = 6;
MAX6675 thermocouple(thermoCLK, thermoCS, thermoDO);


const int relayPin =8;
const int relayON = LOW; // do not change
const int relayOFF = HIGH; // do not change
int relayState = relayOFF; // initial state of relay

const int TEMPERATURE_UNIT =1; // 1=Celsius, 2=Fahrenheit, 3=Kelvin
const float START_TEMPERATURE = 80.0; // unit above
const float STOP_TEMPERATURE = 100.0; // unit above
const int CONTROL_TYPE = 1; // 1= heater, 2=cooler
float temperature;

void setup() {
 // Robojax.com heater/cooler with MAX6675 Thermocoupler
  Serial.begin(9600);
  Serial.println("MAX6675 test with relay");
 // use Arduino pins
  pinMode(relayPin, OUTPUT); // pin for relay
  digitalWrite(relayPin, relayState);

  pinMode(VCCpin, OUTPUT);
  digitalWrite(VCCpin, HIGH);

  pinMode(GNDpin, OUTPUT);
  digitalWrite(GNDpin, LOW);

 // wait for MAX chip to stabilize
  delay(500);
 // Robojax.com heater/cooler with MAX6675 Thermocoupler
}

void loop() {
 // Robojax.com heater/cooler with MAX6675 Thermocoupler
   readTemperature();
   printTemperature();
   loadControl();
   if(temperature >=89.5)
   {
 // /
   }
   delay(1000);
 // Robojax.com heater/cooler with MAX6675 Thermocoupler
} // loop



/*
 * loadControl()
 * @brief controls the load based 
 * @param state can be either : relayON or relayOFF
 * @return returns none
 * Written by Ahmad Shamshiri for robojax.com
 * on May 20, 2020 at 15:23 in Ajax, Ontario, Canada
 */
void loadControl()
{
 // Robojax.com heater/cooler with MAX6675 Thermocoupler
 // Serial.print("Start: ");
 // Serial.print(START_TEMPERATURE);
 // Serial.print(" Stop: ");
 // Serial.println(STOP_TEMPERATURE);
  if(CONTROL_TYPE ==1)
  {
    if(START_TEMPERATURE >= temperature && STOP_TEMPERATURE >=temperature)
    {
      relayControl(relayON);
    }
    if(STOP_TEMPERATURE <=temperature)
    {
      relayControl(relayOFF);
    }
  }else{
    if(START_TEMPERATURE >= temperature && STOP_TEMPERATURE >=temperature)
    {
      relayControl(relayOFF);
    }
    if(STOP_TEMPERATURE <=temperature)
    {
      relayControl(relayON);
    }
  }

 // Robojax.com heater/cooler with MAX6675 Thermocoupler
} // loadControl()


/*
 * relayControl(int state))
 * @brief turns the relay ON or OFF
 * @param state is "relayON" or "relayOFF" defined at the top of code
 * @return returns none
 * Written by Ahmad Shamshiri for robojax.com
 * on May 20, 2020 at 15:23 in Ajax, Ontario, Canada
 */
void relayControl(int state)
{
 // Robojax.com heater/cooler with MAX6675 Thermocoupler
  if(state ==relayON)
  {
    digitalWrite(relayPin, relayON);
    Serial.println("Relay ON");
  }else{
   digitalWrite(relayPin, relayOFF);
    Serial.println("Relay OFF");
  }
 // Robojax.com heater/cooler with MAX6675 Thermocoupler

} // relayControl()


/*
 * readTemperature()
 * @brief reads the temperature based on the TEMPERATURE_UNIT
 * @param average temperature
 * @return returns one of the values above
 * Written by Ahmad Shamshiri for robojax.com
 * on May 20, 2020 at 15:23 in Ajax, Ontario, Canada
 */
void readTemperature()
{
 // Robojax.com heater/cooler with MAX6675 Thermocoupler

  if(TEMPERATURE_UNIT ==2)
   {
   temperature = thermocouple.readFahrenheit(); // convert to Fahrenheit
   }else if(TEMPERATURE_UNIT ==3)
   {
    temperature = thermocouple.readCelsius() + 273.15; // convert to Kelvin
   }else{
    temperature = thermocouple.readCelsius(); // return Celsius
   }
 // Robojax.com heater/cooler with MAX6675 Thermocoupler
} // readTemperature()

/*
 * printTemperature()
 * @brief prints  temperature on serial monitor
 * @param charact type
 * @param "type" is character
 *     C = Celsius
 *     K = Kelvin
 *     F = Fahrenheit
 * @return none
 * Written by Ahmad Shamshiri for robojax.com
 * on May 08, 2020 at 02:45 in Ajax, Ontario, Canada
 */
void printTemperature()
{
 // Robojax.com heater/cooler with MAX6675 Thermocoupler
   Serial.print(temperature);
    printDegree();
  if(TEMPERATURE_UNIT ==2)
   {
     Serial.print("F");
    }else if(TEMPERATURE_UNIT ==3)
   {
     Serial.print("K");
   }else{
     Serial.print("C");
   }
  Serial.println();
 // Robojax.com heater/cooler with MAX6675 Thermocoupler
} // printTemperature()

/*
 * @brief prints degree symbol on serial monitor
 * @param none
 * @return returns nothing
 * Written by Ahmad Shamshiri on July 13, 2019
 * for Robojax Tutorial Robojax.com
 */
void printDegree()
{
    Serial.print("\\xC2");
    Serial.print("\\xB0");
}