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Device::MAS345 0.03
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NAME
Device::MAS345 - Reading the Mastech MAS-345 Multimeter
SYNOPSIS
use Device::MAS345;
my $mas = Device::MAS345->new( port => "/dev/ttyS0" );
my($val, $unit, $mode) = $mas->read();
DESCRIPTION
"Device::MAS345" reads data from a Mastech MAS-345 multimeter connected
to the computer's serial port.
This cheap (less than $50) multimeter measures voltage, current,
temperature, resistance, capacity, and features a serial cable to hook
it up to a PC.
Using "Device::MAS345", you can connect to the multimeter and read out
the currently displayed value, along with the selected mode and a units
character.
Reading data returns three values:
my($val, $unit, $mode) = $mas->read();
$val is the numeric value displayed on the multimeter (e.g. -0.015),
$unit holds the measurement unit (e.g. "V") and $mode adds an additional
mode setting (e.g. "DC").
On error, "Device::MAS345" throws exceptions. If you want to catch them,
use "eval {}". The cause for the error can be seen by calling the
object's "error" message, which returns the string of the last
exception.
Debugging
"Device::MAS345" is "Log::Log4perl"-enabled. To turn on debugging, just
add
use Log::Log4perl qw(:easy);
Log::Log4perl->easy_init($DEBUG);
at the start of your code.
Serial Ports
The constructor can be called without arguments. The optional "ports"
parameter defaults to "/dev/ttyS0", the first serial port.
Gotchas
If you want to run this as a non-root user, make sure that
ls -l /dev/ttyS0
(or whatever serial port the multimeter is connected to) is
read/writeable by the user.
The multimeter has to be turned on for the connection to succeed.
LEGALESE
Copyright 2007 by Mike Schilli, all rights reserved. This program is
free software, you can redistribute it and/or modify it under the same
terms as Perl itself.
AUTHOR
2007, Mike Schilli <
[email protected]>
