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a gizmo on com1 - string eval & if

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Old 09-10-2009
a gizmo on com1 - string eval & if
friends,

i have a gizmo ( vk011) that plugs into my comport ( centOS5.3 )
this I listen to via minicom and it will spit out the temp in the room like this.
Sensor 1 +70.13 DegF Hi +77.56 DegF Low +29.75 DegF
Sensor 1 +70.13 DegF Hi +77.56 DegF Low +29.75 DegF
Sensor 1 +70.13 DegF Hi +77.56 DegF Low +29.75 DegF
... over and over...

My goal is to have a script that I can cron and have it ALARM if the temp in the room exceeds a num (80)

I have found I can write 1 line to a file (01.txt) if i

head -1 /dev/ttyS0 > 01.txt

this has 1 line of

Sensor 1 +70.13 DegF Hi +77.56 DegF Low +29.75 DegF

so _ i am wishing to then read that file.
look at characters position 11 & 12 -- basically get the 70.
and do an if . if that is above 80 then do something.

i *think I already know how to send an email via a bash.
but how do i do this in string eval and have it If.
The sending of an email is the something i wish to do.

There may be a way to assess this temperature value without writing to a file... but this is what I have so far

I have tried perl... But a bash script solution would be wonderful.

thanks
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LEARN ABOUT SUSE

vpcd

vpcd(8) 							     powerman								   vpcd(8)

NAME

       vpcd - virtual power control daemon

SYNOPSIS

       vpcd [--port PORT]

DESCRIPTION

       vpcd  is  a test program for PowerMan which emulates a remote power control device.  It can be run interactively by the powerman daemon, or
       it can listen on a port of your choosing.

OPTIONS

       -p, --port PORT
	      Instructs vpcd to listen for connections on the specified port instead of using stdin/stdout.  Only one connection will be accepted.

INTERACTIVE COMMANDS

       The following commands are available at the vpcd> prompt:

       login  The login command must br run before any of the other commands will work.  No username or password is required.

       logoff Return vpcd to the initial state.

       stat PLUG|*
	      Show the power status of PLUG.  If PLUG is ``*'', perform this action on all plugs.

       beacon PLUG|*
	      Show the beacon status of PLUG.  If PLUG is ``*'', perform this action on all plugs.

       temp PLUG|*
	      Show the temperature of the node attached to PLUG.  If PLUG is ``*'', perform this action on all plugs.

       spew COUNT
	      Print COUNT 80-char lines.  This is the basis of a buffer handling test.

       on PLUG|*
	      Turn on PLUG.  If PLUG is ``*'', perform this action on all plugs.

       off PLUG|*
	      Turn off PLUG.  If PLUG is ``*'', perform this action on all plugs.

       flash PLUG|*
	      Light the beacon on PLUG.  If PLUG is ``*'', perform this action on all plugs.

       unflash PLUG|*
	      Unlight the beacon on PLUG.  If PLUG is ``*'', perform this action on all plugs.

       reset PLUG|*
	      Reset the node attached to PLUG.	If PLUG is ``*'', perform this action on all plugs.

FILES

       /usr/sbin/vpcd

ORIGIN

       PowerMan was originally developed by Andrew Uselton on LLNL's Linux clusters.  This software is open source and distributed under the terms
       of the GNU GPL.

SEE ALSO

       powerman(1), powermand(8), httppower(8), plmpower(8), vpcd(8), powerman.conf(5), powerman.dev(5), powerman-devices(7).

       http://sourceforge.net/projects/powerman

powerman-2.3.5							    2009-02-09								   vpcd(8)