Test temperature and alert Post: 303023734

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Top Forums Shell Programming and Scripting Test temperature and alert Post 303023734 by drysdalk on Friday 21st of September 2018 10:24:05 AM

09-21-2018

Registered User

Hi,

If all you're looking for is a way in Bash to test the value of a number, then the if statement can handle that on its own.

For example, here's a script that will test a previously-defined number, and display one message if it's less than or equal to 90 (the meaning of the -le arithmetic operator), and a different message if any other condition is met (i.e. if it's greater than 90):

Code:

$ cat example.sh
#!/bin/bash
randomnumber=`/usr/bin/shuf -i 1-100 -n 1`
echo "Considering: $randomnumber"

if [ "$randomnumber" -le "90" ]
then
        echo "Less than or equal to 90, so that's OK"
        exit 0
else
        echo "Oh no, it's greater than 90 !"
        exit 1
fi

Here's the output of a sample session:

Code:

$ ./example.sh 
Considering: 5
Less than or equal to 90, so that's OK
$ ./example.sh 
Considering: 91
Oh no, it's greater than 90 !
$ ./example.sh 
Considering: 27
Less than or equal to 90, so that's OK
$

So if all you're looking for is "If less than X do this, if greater than X do the other" the if statement is probably all you need. Hope this helps.

drysdalk

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LEARN ABOUT DEBIAN

device::usb::pcsensor::hidtemper::temper::internal

Device::USB::PCSensor::HidTEMPer::TEMPer::Internal(3pm) User Contributed Perl DocumentationDevice::USB::PCSensor::HidTEMPer::TEMPer::Internal(3pm)

       Device::USB::PCSensor::HidTEMPer::TEMPer::Internal - The HidTEMPer internal sensor

VERSION

       Version 0.02

SYNOPSIS

       None

DESCRIPTION

       This is the implementation of the HidTEMPer internal sensor.

   CONSTANTS
       o  MAX_TEMPERATURE

	  The highest temperature(120 degrees celsius) this sensor can detect.

       o  MIN_TEMPERATURE

	  The lowest temperature(-40 degrees celsius) this sensor can detect.

   METHODS
       o  celsius()

	  Returns the current temperature from the device in celsius degrees.

INHERIT METHODS FROM

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

DEPENDENCIES

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

	 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 is inspired by Relavak's source code and the comments found at: http://relavak.wordpress.com/2009/10/17/
       temper-temperature-sensor-linux-driver/

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.

perl v5.10.1							    2010-07-24		   Device::USB::PCSensor::HidTEMPer::TEMPer::Internal(3pm)