From owner-freebsd-hackers Fri Jan 3 07:49:46 1997 Return-Path: Received: (from root@localhost) by freefall.freebsd.org (8.8.4/8.8.4) id HAA28193 for hackers-outgoing; Fri, 3 Jan 1997 07:49:46 -0800 (PST) Received: from gatekeeper.fsl.noaa.gov (gatekeeper.fsl.noaa.gov [137.75.131.181]) by freefall.freebsd.org (8.8.4/8.8.4) with ESMTP id HAA28186 for ; Fri, 3 Jan 1997 07:49:43 -0800 (PST) Received: from cardinal.fsl.noaa.gov (daemon@cardinal.fsl.noaa.gov [137.75.60.101]) by gatekeeper.fsl.noaa.gov (8.7.5/8.7.3) with ESMTP id PAA18180; Fri, 3 Jan 1997 15:49:42 GMT Received: from auk.fsl.noaa.gov by cardinal.fsl.noaa.gov with SMTP (1.40.112.3/16.2) id AA079356581; Fri, 3 Jan 1997 15:49:41 GMT Message-Id: <32CD2AEB.CCF@fsl.noaa.gov> Date: Fri, 03 Jan 1997 08:51:07 -0700 From: Sean Kelly Organization: CIRA/NOAA X-Mailer: Mozilla 3.0Gold (X11; I; HP-UX B.10.10 9000/725) Mime-Version: 1.0 To: spork Cc: Christoph Kukulies , freebsd-hackers@freefall.freebsd.org Subject: Re: advice sought - Quantum 2GB Atlas broken References: Content-Type: text/plain; charset=us-ascii Content-Transfer-Encoding: 7bit Sender: owner-hackers@FreeBSD.ORG X-Loop: FreeBSD.org Precedence: bulk spork wrote: > Now I just have to find > a way to detect when the CPU fan dies... Those of us tinkering with FreeBSD home automation have a solution. We can run a three-wire bus with Dallas Semiconductor DS1820 temperature sensors attached; the other end plugs into a small component box and into a serial port. The sensors can be placed on key system components (cpu, drives, power supply) and report their temperatures when queried. When the temperature exceeds a certain limit, an X10 appliance module is used to cut power to the system (after a clean shutdown, hopefully). X10 can be run over a serial port or using the built-in /dev/tw driver. If the X10/temperature sensor host itself is running hot, it can shutdown every system and then itself. See http://freebsd.org/~fsmp/HomeAuto/HomeAuto.html for more info. -- Sean Kelly NOAA Forecast Systems Laboratory kelly@fsl.noaa.gov Boulder Colorado USA http://www-sdd.fsl.noaa.gov/~kelly/