#include <SoftwareSerial.h>
SoftwareSerial BT(0,1); //   RX Pin, TX Pin
void setup() {
  Serial.begin(9600);             // Serial port to computer
  BT.begin(9600);               // Serial port to 
}
void loop() {
  while (BT.available()) {        // If  has data
    Serial.write(BT.read());      // Send the data to Serial monitor
  }
  while (Serial.available()) {      // If Serial monitor has data
    BT.write(Serial.read());      // Send that data to 
  }
}