#include <SoftwareSerial.h>

SoftwareSerial mySerial(4, 8); // RX, TX
int i = 0;
int valor;
double temp;
void setup()
{
  mySerial.begin(9600);
  //pinMode(A7, INPUT); no es un imput es un analogico
  
  pinMode(2, OUTPUT);
  pinMode(1, OUTPUT);
  pinMode(0, OUTPUT);
  pinMode(A3, OUTPUT);
}

void loop()
{
 
  valor=analogRead(A7); //
  temp = (valor * 5.0 * 100.0) / 1024.0;
  //analogRead(temp);
  mySerial.println(temp);
  if (temp <= 60) 
  { //temp del líquido 55
    digitalWrite(2, 1);
    digitalWrite(1, 0);
    digitalWrite(0, 1);
    digitalWrite(A3, 1); //analogWrite(3, 255);
  } 
  else
  {
    if (temp >= 65) {//temp del liquido 62
      digitalWrite(2, 0);
      digitalWrite(1, 1);
      digitalWrite(0, 1);
      digitalWrite(A3,0); //analogWrite(3, 0);
    } 
    else
    {
      if (temp >= 62) {//temp del liquido 58
        digitalWrite(2, 1);
        digitalWrite(1, 1);
        digitalWrite(0, 0);
      }
    }
  }
  delay(100); // Delay a little bit to improve simulation performance
}