Re: [Nut-upsuser] Using NUT to detect a normally closed circuit opening
I looked at the docs for the generic ups and I get how to configure the driver, my problem is I cant seem to get the sensor to change any of the pin states when it opens - not being an electronics genius, I was hoping somebody who was could tell me what to wire to where to get the pins to change state when the contact opens Thx -Original Message- From: Charles Lepple [mailto:clep...@gmail.com] Sent: Tuesday, June 21, 2011 7:18 AM To: James Smith Cc: 'nut-upsuser@lists.alioth.debian.org' Subject: Re: [Nut-upsuser] Using NUT to detect a normally closed circuit opening 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 ___ Nut-upsuser mailing list Nut-upsuser@lists.alioth.debian.org http://lists.alioth.debian.org/cgi-bin/mailman/listinfo/nut-upsuser
Re: [Nut-upsuser] Using NUT to detect a normally closed circuit opening
Ok. I now have everything in place and I get an email when the temp sensor opens Question - what do I set so the system doesn't shut down when the sensor stays open? Can I just set SHUTDOWNCMD ? Or is there a cleaner way thx -Original Message- From: Charles Lepple [mailto:clep...@gmail.com] Sent: Tuesday, June 21, 2011 7:18 AM To: James Smith Cc: 'nut-upsuser@lists.alioth.debian.org' Subject: Re: [Nut-upsuser] Using NUT to detect a normally closed circuit opening 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 ___ Nut-upsuser mailing list Nut-upsuser@lists.alioth.debian.org http://lists.alioth.debian.org/cgi-bin/mailman/listinfo/nut-upsuser
Re: [Nut-upsuser] Using NUT to detect a normally closed circuit opening
Citeren James Smith james.sm...@jofco.com: I now have everything in place and I get an email when the temp sensor opens Question - what do I set so the system doesn't shut down when the sensor stays open? The system will only shutdown if you have an OB+LB event at the same time. As long as you make sure the system sees either OB or LB, but not both, you'll be fine. Can I just set SHUTDOWNCMD ? This isn't needed. Note that there is a fatal flaw in a setup where opening a contact triggers an event. You'll have no way to verify that there is not a short in your cable, short of raising the temperature periodically to see if you see something changing. I wouldn't recommend using a temperature switch for anything else than a redundant over temperature kill switch, especially since USB connected temperature sensors are very cheap nowadays. This would allow you to monitor the health of your alarm system much easier. Best regards, Arjen -- Please keep list traffic on the list (off-list replies will be rejected) ___ Nut-upsuser mailing list Nut-upsuser@lists.alioth.debian.org http://lists.alioth.debian.org/cgi-bin/mailman/listinfo/nut-upsuser
Re: [Nut-upsuser] Using NUT to detect a normally closed circuit opening
So how do I make sure it never sees the LB event (or ignores it)? The sensor is in an oily boiler room that is prone to water spillages etc., our only semi reliable option was a mechanical thermostat style sensor strapped directly to a pipe, so usb is pretty much out of the question. All I am using this for is to email our maintenance crew if the temp in the cooling tower pipe goes over-range as it indicates a situation that can usually easily be remedied before it becomes an issue, it has no relation whatsoever to the power situation where the NUT software is, I'm just using a framework that's already there for something completely unrelated. The point about the short is a valid one, but I don't think it will be an issue (if it ever does become an issue, I can change the sensor out for a normally open one and change the driver file accordingly) -Original Message- From: nut-upsuser-bounces+james.smith=jofco@lists.alioth.debian.org [mailto:nut-upsuser-bounces+james.smith=jofco@lists.alioth.debian.org] On Behalf Of Arjen de Korte Sent: Wednesday, June 22, 2011 11:10 AM To: nut-upsuser@lists.alioth.debian.org Subject: Re: [Nut-upsuser] Using NUT to detect a normally closed circuit opening Citeren James Smith james.sm...@jofco.com: I now have everything in place and I get an email when the temp sensor opens Question - what do I set so the system doesn't shut down when the sensor stays open? The system will only shutdown if you have an OB+LB event at the same time. As long as you make sure the system sees either OB or LB, but not both, you'll be fine. Can I just set SHUTDOWNCMD ? This isn't needed. Note that there is a fatal flaw in a setup where opening a contact triggers an event. You'll have no way to verify that there is not a short in your cable, short of raising the temperature periodically to see if you see something changing. I wouldn't recommend using a temperature switch for anything else than a redundant over temperature kill switch, especially since USB connected temperature sensors are very cheap nowadays. This would allow you to monitor the health of your alarm system much easier. Best regards, Arjen -- Please keep list traffic on the list (off-list replies will be rejected) ___ Nut-upsuser mailing list Nut-upsuser@lists.alioth.debian.org http://lists.alioth.debian.org/cgi-bin/mailman/listinfo/nut-upsuser ___ Nut-upsuser mailing list Nut-upsuser@lists.alioth.debian.org http://lists.alioth.debian.org/cgi-bin/mailman/listinfo/nut-upsuser
Re: [Nut-upsuser] Using NUT to detect a normally closed circuit opening
Citeren James Smith james.sm...@jofco.com: So how do I make sure it never sees the LB event (or ignores it)? By wiring you sensor so that it either sets OB or LB and hard wiring the other to the inactive state. [...] The point about the short is a valid one, but I don't think it will be an issue (if it ever does become an issue, I can change the sensor out for a normally open one and change the driver file accordingly) This fails in a similar way - you have no way to determine if the sensor is not connected or if it is in the below limit temperature range. For an alarm system to be reasonably robust, you need to continuously monitor the health of your sensor and interconnect as well. Best regards, Arjen -- Please keep list traffic on the list (off-list replies will be rejected) ___ Nut-upsuser mailing list Nut-upsuser@lists.alioth.debian.org http://lists.alioth.debian.org/cgi-bin/mailman/listinfo/nut-upsuser
Re: [Nut-upsuser] Using NUT to detect a normally closed circuit opening
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 ___ Nut-upsuser mailing list Nut-upsuser@lists.alioth.debian.org http://lists.alioth.debian.org/cgi-bin/mailman/listinfo/nut-upsuser
