Build your own BMI?
I've had an interesting question raised to me.
We know that there are monitoring devices that can be put as modules in UPSes to monitor temperature / humidty ... and subsequently shut your machines down at a given temperature ...
Well, what about the comms cabs in cupboards and so on where you only have a room that you want to keep a log of temperature to see about cooling, or even remotely shut down machines (eg a classroom is left on overnight and gets above 30 degress so you need the server to send a remote shutdown command).
Any ideas about what you have already done to shut devices down based on temperature or humidty, or possible methods that may be particularly Heath-Robinson (but still a good base to work from).
Unfortunately extending a BMI system to do this is not an option at the moment, partly due to wanting to keep control in the hands of the on-site support staff rather than the people that own the building.
Those in remote cabs/locations linked to 1-wire temperature sensors going back to a nagios or other type monitoring server.
I use a 1 wire serial adapter in my groundwork server in the server room to monitor temp in there.
I was actually thinking of doing something that may do this if and when I get a hold of a dev board for the new PIC micro series:
NEW EMBEDDED ETHERNET on Microchip PIC18 Microcontrollers - Microcontroller.com
Embedded ethernet onchip with a cheap temperature and humidity sensor:
Electronics-Lab.com Blog Blog Archive PIC Microcontroller Temperature Sensor
and a power adapter, your pretty much done.
All of the TCP/IP code is avalible free from PIC
TCP/IP Stack for PIC18, PIC24, dsPIC & PIC32
so implementation is not to much of a stretch as it even supporrts SNMP which could be tied to your favorite monitering app.
EDIT: The solution above looks way easier