# STEP 2.6   --> get_foundtime_from_garmin
sub get_foundtime_from_garmin {
    my $cache_id = shift;
    my $foundtime_from_garmin = '';

    if ( -f $garminfoundfile ) {
        print "   DEBUG get_foundtime_from_garmin 1:  GARMIN CONNECTED:  $garminfoundfile\n";

        # sleep for 1 second because we open and close the file again and again
        sleep 1;
        
        # read exact timestamp from files 
        open GCVISITSFILE, "<encoding(utf16_le)", $garminfoundfile 
                   or die "Error: $garminfoundfile file cannot be opened!\n$!";

        # read the geocache_visits file line by line
        while (<GCVISITSFILE>){     
            # read the current line
            my $line = $_;

            # removing the last two characters
            chop($line);
            chop($line);
        
            # split $line into comma separated strings
            my @currentline = split(/,/,$line);
        
            # check whether the $cache_id is listed in the beginning of the $currentline
            
            if ($currentline[0] eq "$cache_id") {
                # found the $cache_id
                print   "   Found GCid $currentline[0] in geocache_visits.txt file\n".
                        "   Reading time of found...\n";
                
                $foundtime_from_garmin = $currentline[1];
            }     
        }
        close(GCVISITSFILE);   # close file again
    } else {
        # setting return code to "n/a" when the geocache_visits.txt
        # file is not accessible 
        $foundtime_from_garmin = "n/a";
    }
    return $foundtime_from_garmin;
}