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