#!/usr/bin/perl

use warnings;
use strict;

use Device::SerialPort;



my $port = Device::SerialPort->new( "/dev/ttyUSB0" );
$port->baudrate(57600);
$port->databits(8);
$port->stopbits(1);
$port->parity("none");

my $bytestring ="";
my $status =0;


while(1) {


  my $byte=$port->read(1);
     
      if ($byte =~ /L/) {
           $bytestring="";
                   $status=1;
      }
      
      if ($status==1) {
          $bytestring=$bytestring.$byte; 
      }
      if ($byte =~ /;/) {
          my @data = split(/=/, $bytestring);
           
             if ($data[0] =~ /L/) {
               if (scalar(@data)>3) {
               
                  

               }
               else  {
      
                  if (($data[scalar(@data)-1]=~ /20/)) {
                  print "Check Okay";
                  
                  
               }             
               }
            }   
           $status=0;

          }
          else 
          {
          
          print "Failure";
       
          open (FILE, '>statusrf12.txt');

         
          print FILE "0";
          close FILE;
          }
    sleep(3);

     }