Created
October 11, 2012 14:24
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UPS Monitor
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#!/usr/bin/env perl | |
use strict; | |
use Device::SerialPort; | |
use IO::Socket; | |
use IO::Pipe; | |
use IO::Select; | |
my $pipe = IO::Pipe->new(); | |
my $pid = fork(); | |
if($pid != 0){ | |
simple_server(); | |
wait; | |
} | |
elsif(defined $pid){ | |
ups_monitor(); | |
exit: | |
} | |
sub ups_monitor | |
{ | |
#monitoring | |
my $port = new Device::SerialPort('/dev/ttyUSB0'); | |
$port->baudrate(2400); | |
$port->databits(8); | |
$port->parity("none"); | |
$port->stopbits(1); | |
#become writer | |
$pipe->writer(); | |
$pipe->autoflush(1); | |
while(1){ | |
$port->write("Q1\x0d"); | |
my ($count_in, $string_in) = $port->read(100); | |
unless($count_in == 47){ | |
sleep(1); | |
next; | |
} | |
my @line = split(/[\(| ]/,$string_in); | |
$line[4] += 0; | |
my($vin,$vout,$load,$freq,$vbat) = ($line[1],$line[3],$line[4],$line[5],$line[6]); | |
print $pipe "$vin,$vout,$load,$freq,$vbat\n"; | |
sleep(1); | |
} | |
} | |
sub simple_server | |
{ | |
#become reader | |
$pipe->reader(); | |
my $listener = new IO::Socket::INET(Listen => 1, LocalPort => 13255, ReuseAddr => 1); | |
my $selector = new IO::Select($pipe, $listener); | |
my($vin,$vout,$load,$freq,$vbat); | |
while(my @ready = $selector->can_read) { | |
foreach my $fh (@ready) { | |
if($fh == $listener) { | |
my $new = $listener->accept; | |
$selector->add($new); | |
} | |
elsif($fh == $pipe){ | |
my $upslog = <$pipe>; | |
if(defined $upslog){ | |
chomp $upslog; | |
my @dat = split(/,/,$upslog); | |
($vin,$vout,$load,$freq,$vbat) = @dat; | |
} | |
} | |
else { | |
print $fh <<"_HTTP_"; | |
Content-Type: text/plain | |
$vin,$vout,$load,$freq,$vbat | |
_HTTP_ | |
$selector->remove($fh); | |
$fh->close; | |
} | |
} | |
} | |
} |
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