use strict;
use warnings;

use lib '/usr/local/lib';
use GPS::NMEAserial;

my $nmea_unit =
  GPS::NMEAserial->new_nmea_port( '/dev/nmea', 
			 	  "/var/run/.nmea_unit.conf" );

my $heading_string = $nmea_unit->get_heading();
print "$heading_string\n";
sleep(10);
my $heading_string2 = $nmea_unit->get_heading();
print "$heading_string2 is not most recent value\n";