¶

Device::USB::PCSensor::HidTEMPer::NTC::Internal - The HidTEMPerNTC external sensor

VERSION¶

Version 0.02

SYNOPSIS¶

None

DESCRIPTION¶

This is the implementation of the HidTEMPerNTC external sensor.

CONSTANTS¶

•

MAX_TEMPERATURE

 

The highest temperature(150 degrees celsius) this sensor can detect.

•

MIN_TEMPERATURE

 

The lowest temperature(-50 degrees celsius) this sensor can detect.

•

INITIAL_GAIN

 

The initial gain value used to calculate voltage returned

•

CALIBRATION_VALUES

 

Values used to calculate Volt7705Calibration

METHODS¶

•

new()

 

Returns a new External sensor object.

•

celsius()

 

Returns the current temperature from the device in celsius degrees.

 

The formula used to calculate value based on a calibrated key value is created using the Eureqa tool from Cornell Computational Synthesis Lab, http://ccsl.mae.cornell.edu/eureqa.

 

Resulting in the use of this formula instead of the provided number list: f(y)=66.7348/(66.7275/(67.8088 - 9.70353*log(0.000251309 + y*y)) - 0.21651)

 

If you find another formula that is more accurate please drop me a line. The data used can be found in the source code of this file.

INHERIT METHODS FROM¶

Device::USB::PCSensor::HidTEMPer::Sensor

DEPENDENCIES¶

This module internally includes and takes use of the following packages:

  use Carp;
  use Time::HiRes qw / sleep /;
  use Device::USB::PCSensor::HidTEMPer::Sensor;

This module uses the strict and warning pragmas.

BUGS¶

Please report any bugs or missing features using the CPAN RT tool.

FOR MORE INFORMATION¶

None

AUTHOR¶

Magnus Sulland < msulland@cpan.org >

ACKNOWLEDGEMENTS¶

This code includes findings done by Robin B. Jensen, http://www.drunkardswalk.dk, when converting the received hex values into volt.

COPYRIGHT & LICENSE¶

Copyright (c) 2010 Magnus Sulland This program is free software; you can redistribute it and/or modify it under the same terms as Perl itself.