#include<SoftwareSerial.h>
int led = 12;// declaring the LED pin
char ON = 'a';// declaring that  ONturnon is the char the will be recived.
SoftwareSerial mySerial(0, 1);
SoftwareSerial mySerial2(11, 10);
char chr;

void setup() {
  mySerial.begin(9600);
mySerial2.begin(9600);
  pinMode(led, OUTPUT);
 
}

void loop()
{
  chr = mySerial2.read();// chr will be equal to which the derial will read
 if (chr ==  ON) {// if the chr have the same value of ON, the LED will be ON.
  mySerial.print("El valor enviado es:");
  mySerial.print(chr);//Mostramos el caracter enviado
    digitalWrite(led, HIGH);
    delay(100);
  }
  else {
    digitalWrite(led, LOW);
    
   // digitalWrite(led, HIGH);
  }

}