temperatura arduion e javafx

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

// sensor temperatura port 2
#define ONE_WIRE_BUS 2

//rele ligar/desligar ventilador/ar
#define ObjVent 4

OneWire oneWire(ONE_WIRE_BUS);
DallasTemperature sensor(&oneWire);

//referencia para temperatura final

float conttemperatura1=0;
 int conttemperatura2=0;
 int cont1=0;
 int pin_modeVent=4;
 int  vltemp=29;

void setup(void)
{
  digitalWrite(4,HIGH);
  Serial.begin(9600);
  delay(145);
  Serial.println("Dallas Temperature library");
 sensor.begin();

pinMode(4,OUTPUT);




}

void loop(void)
{
    //conaando o loop
    cont1= cont1+1;
    delay(100);
    //requisiçao do sensor
sensor.requestTemperatures();

 //temperatura atural
delay(100);
 //float dooble int
 conttemperatura1=sensor.getTempCByIndex(0);
 conttemperatura2=conttemperatura1;

if(Serial.available()){
  char caracter=Serial.read();

  if(caracter=='A'){


    Serial.println("LIGADO");
    digitalWrite(4,LOW);
    }

  if(caracter=='B'){

    Serial.println("DESLIGADO");
    digitalWrite(4,HIGH);
    }
   if(caracter=='X'){
    delay( 100);
    vltemp=vltemp+1;
    delay(100);
    Serial.print(" almentando temperatura");
    Serial.println( vltemp);
    delay(100);


     }
  if(caracter=='Y'){
  delay(100);
    vltemp=vltemp-1;
    delay(100);
    Serial.print(" Diminuindo temperatura");
    Serial.println( vltemp);

    delay(100);


    }



    if(caracter=='K'){//padrao modifique

   vltemp=25;


    }
   if(caracter=='k'){

   vltemp=25;

    }
  }

if(cont1==1){
   Serial.println(conttemperatura1);

  delay(100);
  if(conttemperatura1>vltemp){
  Serial.println("+");

  }delay(100);
  if(conttemperatura1<vltemp){
    delay(100);
    Serial.println("-");

    }delay(100);
  }

  if(cont1==3){
 delay(100);
  Serial.println(conttemperatura2);
  delay(100);
  if(conttemperatura2>vltemp){
    delay(100);
  Serial.println("+");
 ;Serial.println(" LIGADO");
    digitalWrite(4,LOW);
delay(100);
  } if(conttemperatura2<vltemp){
    delay(100);
 Serial.println("DESLIGADO");
    digitalWrite(4,HIGH);
    delay(100);
  }
    cont1=1;
  }


  delay(100);



}
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