#include <SoftwareSerial.h>
String readString; 
SoftwareSerial Pedrojon(6,7);

void setup()  
{
  Pedrojon.begin(9600);
  Serial.begin(9600);
}

void loop() 
{
   Pedrojon.print("Esperando");
    
    while (Serial.available()){
      delay(3);
      char c = Serial.read();
      readString += c;
    }
    Pedrojon.print("Dato recibido: ");
    Pedrojon.println(readString);
  
}