#include "max6675.h"

int termoCLK = 6;
int termoCS = 7;
int termoSO = 8;


MAX6675 thermocouple(termoCLK, termoSO, termoCS);

#define ENC_A 2
#define ENC_B 3

int clockPin; // Placeholder por pin status used by the rotary encoder
int clockPinState; // Placeholder por pin status used by the rotary encoder
int set_temperature = 1; // This set_temperature value will increas or decreas if when the rotarty encoder is turned
int max_temperature = 25;
float temperature_value_c = 0.0; // stores temperature value

#define LED_MIN 4
#define LED_MAX 5

#define OUT_RELAY 9
#define OUT_BUZZER 10


void setup() {


  pinMode(LED_MIN, OUTPUT);
  pinMode(LED_MAX, OUTPUT);

  pinMode(OUT_RELAY, OUTPUT);
  pinMode(OUT_BUZZER, OUTPUT);


  // Set encoder pins and attach interrupts
  pinMode(ENC_A, INPUT_PULLUP);
  pinMode(ENC_B, INPUT_PULLUP);

  attachInterrupt(digitalPinToInterrupt(ENC_A), read_encoder, CHANGE);
  attachInterrupt(digitalPinToInterrupt(ENC_B), read_encoder, CHANGE);
  Serial.begin(9600);
  delay(1000);

  digitalWrite(LED_MIN, LOW);
  digitalWrite(LED_MAX, LOW);

}

void loop() {

  int sTemp = thermocouple.readCelsius();

  clockPin = digitalRead(ENC_A);

  if (clockPin == 1 ) {
     digitalWrite(LED_MAX, LOW);
     digitalWrite(LED_MIN, HIGH);
  }  

  if (sTemp == set_temperature){
    digitalWrite(OUT_RELAY, LOW);
  }else{
    digitalWrite(OUT_RELAY, HIGH);
  }

  Serial.print("Set Temp:");
  Serial.print(set_temperature );
  Serial.println(" C");

  Serial.print("Read Temp:");
  Serial.print(sTemp );
  Serial.println(" C");

  delay(1000);

}



void read_encoder() // In this function we read the encoder data and increment the counter if it is rotating clockwise and decrement the counter if it's rotating counterclockwise
{
  clockPin = digitalRead(ENC_A); // we read the clock pin of the rotary encoder

  
 
  if (clockPin != clockPinState && clockPin == 1) { // if this condition is true then the encoder is rotaing counter clockwise and we decremetn the counter
    if (digitalRead(ENC_B) != clockPin) set_temperature = set_temperature - 3;  // decrmetn the counter.
    else set_temperature = set_temperature + 3; // Encoder is rotating CW so increment
    
    if (set_temperature <= 1 ) {
      set_temperature = 1; // if the counter value is less than 1 the set it back to 1
      digitalWrite(LED_MAX, LOW);
      digitalWrite(LED_MIN, HIGH);
    }
    
    if (set_temperature > max_temperature ) {
      set_temperature = max_temperature; //if the counter value is grater than 150 then set it back to 150
      digitalWrite(LED_MIN, LOW);
      digitalWrite(LED_MAX, HIGH);
    }

  }
  clockPinState = clockPin; // Remember last CLK_PIN state

}