[Nut-upsuser] Using NUT to detect a normally closed circuit opening

[Charles Lepple]

On Jun 20, 2011, at 2:09 PM, James Smith wrote:

> I have a temperature sensor (normally closed) that opens when it  
> reaches a pre-defined temp. what I am trying to do is use NUT to  
> look for the circuit opening and trigger an action (email or  
> whatever). Is there a NUT ups driver I can use to do this? If so,  
> does anybody know which pins on the serial I should connect the  
> sensor to?
>
Someone else might have some suggestions about which pins to use, but  
the genericups driver is the one which allows you to choose which pins  
map to various states:

http://www.networkupstools.org/docs/man/genericups.html#_custom_configurations

You probably want to map the sensor to the on line/on battery states,  
since the low battery state is meant to be a one-way trip to shutting  
down the system. The OL and OB states mentioned in the genericups man  
page will trigger the first two notifications listed here:

http://www.networkupstools.org/docs/man/upsmon.html#_notify_events