#include <SoftwareSerial.h>
  SoftwareSerial mySerial(0, 1);

void setup() {

CLKPR = (1 << CLKPCE);
CLKPR = (0 << CLKPS3) | (0 << CLKPS2) | (0 << CLKPS1) | (0 << CLKPS0);

mySerial.begin(9600); 
mySerial.println("Ready");

}

void loop() {

while(mySerial.available()) {
  char value = mySerial.read();
  mySerial.println(value);
}
 
}