#include <LiquidCrystal.h> // Inclui a biblioteca do LCD
const int rs = 12, en = 11, d4 = 5, d5 = 4, d6 = 3, d7 = 2; // Pinos do LCD
LiquidCrystal lcd(rs, en, d4, d5, d6, d7);

int setpoint=0;
int sensortemperatura=0;
int histerese=10;
int limitesuperior=0;
int limiteinferior=0;

void setup() {
  // put your setup code here, to run once:

  pinMode(13, OUTPUT); //led verde
  pinMode(A5, OUTPUT); //led amarelo
  pinMode(10, OUTPUT); //led vermelho

  
 //inicialização das variáveis
  digitalWrite(A5,0);
  digitalWrite(10, 0);
  digitalWrite(13, 0);
  
}

void loop() {
  // put your main code here, to run repeatedly:

  //utilizando variável analógica de entrada, escrevendo no lcd (variando potenciometro)
  setpoint = analogRead(A0); //potenciometro setpoint
  sensortemperatura = analogRead(A1); //potenciometro sensor
  sensortemperatura = map(sensortemperatura,0,1023,0,300); //(valor a ser variado, range inicial bit, range final bit, range inicial decimal, range final decimal)
  setpoint = map(setpoint,0,1023,0,300); //(valor a ser variado, range inicial bit, range final bit, range inicial decimal, range final decimal)


  lcd.clear();
  lcd.begin(16, 2);
  lcd.setCursor(0,0);
  lcd.print("SETPOINT:");
  lcd.setCursor(10,0);
  lcd.print(setpoint);

  lcd.setCursor(0,1);
  lcd.print("TEMPERATURA:");
  lcd.setCursor(13,1);
  lcd.print(sensortemperatura);
  delay(500);

//Se temperatura > setpoint+histerese, desliga o forno

limitesuperior = setpoint + histerese;
limiteinferior = setpoint - histerese;


if(sensortemperatura >= limitesuperior){
    digitalWrite(10, LOW);
    digitalWrite(A5, LOW);
    digitalWrite(13, HIGH);
}
if (sensortemperatura <= limiteinferior){
     digitalWrite(10,HIGH);
     digitalWrite(A5, LOW);
     digitalWrite(13, LOW);
}

}