/ 
Device-CurrentCost-1.110390
River stage one • 1 direct dependent • 1 total dependent
⭐ Starred 2 GitHub stars
/ Device::CurrentCost

NAME

Device::CurrentCost - Perl modules for Current Cost energy monitors

VERSION

version 1.110390

SYNOPSIS

use Device::CurrentCost;
my $envy = Device::CurrentCost->new(device => '/dev/ttyUSB0');

$|=1; # don't buffer output

while (1) {
  my $msg = $envy->read() or next;
  print $msg->summary, "\n";
}

use Device::CurrentCost::Constants;
my $classic = Device::CurrentCost->new(device => '/dev/ttyUSB1',
                                       type => CURRENT_COST_CLASSIC);
...

DESCRIPTION

Module for reading from Current Cost energy meters.

IMPORTANT: This is an early release and the API is still subject to change.

The API for history is definitely not complete. This will change soon and an mechanism for aggregating the history (which is split across many messages) should be added.

METHODS

new(%parameters)

This constructor returns a new Current Cost device object. The supported parameters are:

device

The name of the device to connect to. The value should be a tty device name, e.g. /dev/ttyUSB0. This parameter is mandatory.

type

The type of the device. Currently either CURRENT_COST_CLASSIC or CURRENT_COST_ENVY. The default is CURRENT_COST_ENVY.

baud

The baud rate for the device. The default is derived from the type and is either 57600 (for Envy) or 9600 (for classic).

device()

Returns the path to the device.

type()

Returns the type of the device.

baud()

Returns the baud rate.

posix_baud()

Returns the baud rate in POSIX#Termios format.

filehandle()

Returns the filehandle being used to read from the device.

open()

This method opens the serial port and configures it.

read($timeout)

This method blocks until a new message has been received by the device. When a message is received a data structure is returned that represents the data received.

IMPORTANT: This API is still subject to change.

read_one(\$buffer)

This method attempts to remove a single Current Cost message from the buffer passed in via the scalar reference. When a message is removed a data structure is returned that represents the data received. If insufficient data is available then undef is returned.

IMPORTANT: This API is still subject to change.

AUTHOR

Mark Hindess <soft-cpan@temporalanomaly.com>

COPYRIGHT AND LICENSE

This software is copyright (c) 2011 by Mark Hindess.

This is free software; you can redistribute it and/or modify it under the same terms as the Perl 5 programming language system itself.