NAME
    AnyEvent::OWNet - Client for 1-wire File System server

VERSION
    version 1.110430

SYNOPSIS
      # IMPORTANT: the API is subject to change

      my $ow = AnyEvent::OWNet->new(host => '127.0.0.1',
                                    on_error => sub { warn @_ });

      # Read temperature sensor
      $ow->read('/10.123456789012/temperature', sub { my ($res) = @_; ... });

      # List all devices
      my $cv;
      $cv = $ow->devices(sub {
                           my $dev = shift;
                           print $dev, "\n";
                         });
      $cv->recv;

      # Read the temperatures of all devices that are found
      $cv = $ow->devices(sub {
                           my $dev = shift;
                           $cv->begin;
                           $ow->get($dev.'temperature',
                                    sub {
                                      my $res = shift;
                                      $cv->end;
                                      my $value = $res->{data};
                                      return unless (defined $value);
                                      print $dev, ' = ', 0+$value, "\n";
                                    });
                         });
      $cv->recv;

      # short version of the above
      $cv = $ow->device_files(sub {
                                my ($dev, $file, $value) = @_;
                                print $dev, ' = ', 0+$value, "\n";
                              }, 'temperature');
      $cv->recv;

      # read humidity as well
      $cv = $ow->device_files(sub {
                                my ($dev, $file, $value) = @_;
                                print $dev, $file, ' = ', 0+$value, "\n";
                              }, ['temperature', 'humidity']);
      $cv->recv;

DESCRIPTION
    AnyEvent module for handling communication with an owfs 1-wire server
    daemon.

METHODS
  "new( %parameter_hash )"
    Constructs a new AnyEvent::OWNet object. The parameter hash can contain
    values for the following keys:

    "host"
        The host IP of the running "owserver" daemon. Default is the IPv4
        loopback address, 127.0.0.1.

    "port"
        The TCP port of the running "owserver" daemon. Default is 4304.

    "timeout"
        The timeout in seconds to wait for responses from the server.
        Default is 5 seconds.

  "read($path, $sub)"
    Perform an OWNet "read" operation for the given path.

  "write($path, $value, $sub)"
    Perform an OWNet "write" operation of the given value to the given path.

  "dir($path, $sub)"
    Perform an OWNet "dir" operation for the given path. The callback will
    be called once with the list of directory entries in the data field
    which isn't consistent with the (misguided?) low-latency intent of this
    operation so using dirall probably makes more sense provided the server
    supports it.

  "present($path, $sub)"
    Perform an OWNet "present" check on the given path.

  "dirall($path, $sub)"
    Perform an OWNet "dirall" operation on the given path.

  "get($path, $sub)"
    Perform an OWNet "get" operation on the given path.

  "dirallslash($path, $sub)"
    Perform an OWNet "dirall" operation on the given path.

  "getslash($path, $sub)"
    Perform an OWNet "get" operation on the given path.

  "all_cv( [ $condvar ] )"
    This method returns the AnyEvent condvar that is used to track all
    outstanding operations. It can also be used to set the initial value but
    this is only sensible when no operations are currently outstanding and
    is not normally necessary.

  "cleanup( @error )"
    This method is called on error or when the closing the connection to
    free up resources and notify any receivers of errors.

  "connect( [ $command, $callback|$condvar ] )"
    This method connects to the "owserver" daemon. It is called
    automatically when the first command is attempted.

  "devices( $callback, [ $path, [ $condvar ] ] )"
    This method identifies all devices below the given path (or '/' if the
    path is not given). An "AnyEvent" condvar may also be supplied that will
    be used to track "begin" and "end" of all actions carried out during the
    identification process. If no condvar is provided then one will be
    created. The condvar used is returned by this method.

    The supplied callback is called for each device with the path to each
    device as the first argument and the condvar for the operation as the
    second argument. The intention of passing the callback the condvar (that
    if not provided is created by the initial call) is to enable the
    callbacks that need to make further asynchronous calls to use "begin"
    calls and "end" calls (in the async callback) on the condvar so that the
    complete operation may be tracked. See the SYNOPSIS for an example.

    This method currently assumes that the "owserver" supports the
    "getslash" function and if this is not the case it will fail.

  "device_files( $callback, $file, [ $path, [ $condvar ] ] )"
    Visit each device using devices() and call the callback with the result
    of successful get() calls for $file relative to each device found. If
    $file is an array reference each array element is treated as a relative
    file.

  "anyevent_read_type()"
    This method is used to register an AnyEvent::Handle read type to read
    "OWNet" replies from an "owserver" daemon.

TODO
    The code assumes that the "owserver" supports persistence and does not
    check the response flags to recognize when it is not.

SEE ALSO
    AnyEvent(3)

    OWFS Website: http://owfs.org/

    OWFS Protocol Document: http://owfs.org/index.php?page=owserver-protocol

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.