Serial UART Communication

Ok, I figured out a way. There must be more elegant ways to do this, but at least now I can see what I am receiving and I can take some actions depending on the messages.

Serial1.setup(2400/*baud*/);
Serial1.onData(function (e) { 
  var tr=(e.data);
  p=tr.charCodeAt(0);
  print(p);
  switch (p)
  {
    case 80 :
      var s = "CV,1.6A to 3A"; 
      print(s);
      break;
    case 96 :
      var s2 = "CV, < 1.6A"; 
      print(s2);
      break;
    case 85 :
      break;
    default :
      var s3="*";
      print(s3);
  }
});