/*
  Blink
  Turns on an LED on for one second, then off for one second, repeatedly.

  Most Arduinos have an on-board LED you can control. On the UNO, MEGA and ZERO 
  it is attached to digital pin 13, on MKR1000 on pin 6. LED_BUILTIN takes care 
  of use the correct LED pin whatever is the board used.
  If you want to know what pin the on-board LED is connected to on your Arduino model, check
  the Technical Specs of your board  at https://www.arduino.cc/en/Main/Products
  
  This example code is in the public domain.

  modified 8 May 2014
  by Scott Fitzgerald
  
  modified 2 Sep 2016
  by Arturo Guadalupi

  modified 30 Apr 2018
  by David Arias

  Change of to pin 0, corresponding to pin 13 in the Attiny44a.
*/
#include <SoftwareSerial.h>
// Definitions
#define rxPin A2 //Pin 13 for ATiny44. Receiving pin
#define txPin A1 //Pin 12 for ATiny44. Transmiting pin
#define button A3 //Defines the pin for the button input

SoftwareSerial mySerial(rxPin, txPin);

int buttonState = 0;
char data = 0;
// the setup function runs once when you press reset or power the board
void setup() {

   mySerial.begin(9600);
  // initialize digital pin LED_BUILTIN as an output.
  pinMode(A0, OUTPUT);
}

// the loop function runs over and over again forever
void loop() {
   
  if (mySerial.available()>0){
    
    delay(500);
    data = mySerial.read();
    if (data == '0'){
      mySerial.println("si es 0");
      digitalWrite(LED_BUILTIN, HIGH);
    delay(500);
      }
   // mySerial.print(data);
   // digitalWrite(A0, HIGH);
   // delay(500);
   else {
   digitalWrite(LED_BUILTIN, LOW);
   }
   // delay(500);
  } 
}