arduino_bluetooth_led.ino

#include <SoftwareSerial.h>

SoftwareSerial bluetooth(2, 3);

void setup() {
  bluetooth.begin(9600);
  pinMode(13, OUTPUT);
}

void loop() {
  if(bluetooth.available() > 0)
  {
    int status_led = bluetooth.read();
    if(status_led == 49)
    {
      digitalWrite(13, HIGH);
    }
    if(status_led == 48)
    {
      digitalWrite(13, LOW);
    }  
  }  
}