title: How to send signals from arduino to android using bluetooth?
body: <p>I need to know this as a part of my final project. </p>
  
  <p>How can a signal send to an android smartphone from an arduino board using bluetooth?</p>
  
  <p>I saw its very simple to sent signal from smartphone to arduino via bluetooth. </p>
  
  <p>My question is how the inverse of this can be done????</p>