NAME

Device::Modem - Perl extension to talk to modem devices connected via serial port

WARNING

   This is C<ALPHA> software, still needs extensive testing and
   support for generic AT commands, so use it at your own risk,
   and without C<ANY> warranty! Have fun.

SYNOPSIS

  use Device::Modem;

  my $modem = new Device::Modem( port => '/dev/ttyS1' );

  if( $modem->connect( baudrate => 9600 ) ) {
      print "connected!\n";
  } else {
      print "sorry, no connection with serial port!\n";
  }

  $modem->attention();          # send `attention' sequence (+++)

  $modem->dial('02270469012');  # dial phone number
  $modem->dial(3);              # 1-digit parameter = dial number stored in memory 3

  $modem->echo(1);              # enable local echo
  $modem->echo(0);              # disable it

  $modem->offhook();            # Take off hook (ready to dial)
  $modem->hangup();             # returns modem answer

  $modem->is_active();          # Tests whether modem device is active or not
                                # So far it works for modem OFF/ modem ON condition

  $modem->reset();              # hangup + attention + restore setting 0 (Z0)

  $modem->restore_factory_settings();  # Handle with care!
  $modem->restore_factory_settings(1); # Same with preset profile 1 (can be 0 or 1)

  $modem->send_init_string();   # Send initialization string
                                # Now this is fixed to 'AT H0 Z S7=45 S0=0 Q0 V1 E0 &C0 X4'

  # Get/Set value of S1 register
  my $S1 = $modem->S_register(1);
  my $S1 = $modem->S_register(1, 55); # Don't do that if you definitely don't know!

  # Get status of managed signals (CTS, DSR, RLSD, RING)
  my %signal = $modem->status();
  if( $signal{DSR} ) { print "Data Set Ready signal active!\n"; }

  # Stores this number in modem memory number 3
  $modem->store_number(3, '01005552817');

  $modem->repeat();             # Repeat last command

  $modem->verbose(0);           # Modem responses are numerical
  $modem->verbose(1);           # Normal text responses

  #
  # Some raw AT commands
  #
  $modem->atsend( 'ATH0' );
  print $modem->answer();

  $modem->atsend( 'ATDT01234567' . Device::Modem::CR );
  print $modem->answer();

DESCRIPTION

Device::Modem class implements basic AT (Hayes) compliant device abstraction. It is meant to be inherited by sub classes (as Device::Gsm), which are based on serial connections.

In the `examples' directory, there are some scripts that should work without big problems, that you can take as (yea) examples:

`examples/active.pl': Tests if modem is alive
`examples/dial.pl': Dials a phone number and display result of call
`examples/shell.pl': (Very) poor man's minicom/hyperterminal utility

REQUIRES

Device::SerialPort (Win32::SerialPort for Windows machines)

EXPORT

None

TO-DO

Improve question/answer cycle
Do something better on question/answer routines with better initializations, timeout handling and signals lookup.
Document log interface
Explain which type of logging hooks you can use with Device::Modem and its sub-classes (Device::Gsm). For now, they are only `file' and `syslog'
AutoScan
An AT command script with all interesting commands is run when `autoscan' is invoked, creating a `profile' of the current device, with list of supported commands, and database of brand/model-specific commands
Many more to come!

AUTHOR

Cosimo Streppone, cosimo@cpan.org

COPYRIGHT

This library is free software; you can only redistribute it and/or modify it under the same terms as Perl itself.