#!/usr/bin/perl -w

use strict;
use Device::SerialPort;


my $PortObj = new Device::SerialPort ("/dev/ttyAMA0");
$PortObj->baudrate(57600);
$PortObj->parity("none");
$PortObj->databits(8);
$PortObj->stopbits(1);
$PortObj->handshake("none");
$PortObj->stty_igncr;
$PortObj->are_match("\r\n");

$| = 1;

my $count = 0;
while (1) {
    my $char = $PortObj->lookfor();
    chomp($char);
    if ($char) {
        print "Read " . $char . "\n";
    } else {
        sleep(1);
        $count++;
        if ($count % 3 == 0) {
                my $cmd = "\$PFLAC,S,ACFT,0\r\n";
                print "  Send $cmd";
                my $count_out = $PortObj->write($cmd);
                warn "write failed\n" unless ($count_out);
                warn "write incomplete\n" if ( $count_out != length($cmd) );
        }
    }
}

exit 0;