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This project drives a one-wire system, as well as a furnace. Currently, it supports one heating/cooling zone. Currently, it uses the one-wire filesystem, and several libraries. Required Gems: * ActiveRecord, used to store the current settings and provide a historic record of those settings. * Sinatra, haml used to support the web site. * sqlite, used for the backing store for the activerecord database Prerequisites: * One wire file system http://owfs.org * Several one-wire thermometers. I use my own design, but you can buy them from http://www.hobby-boards.com/catalog/main_page.php * Starling, a queue server originally written for twitter. git://github.com/kim-toms/starling.git * rrdtool, a database for keeping the historic temperature data http://oss.oetiker.ch/rrdtool/ * Some RJ45 cabling * An adapter to connect to the 1-wire network. I use the DS9490 USB to 1-wire RJ11 adapter. Adapters for serial ports are also available. * A cable with RJ11 on one end and RJ45 on the other * A Power injector (also available from http://www.hobby-boards.com/catalog/main_page.php) For furnace control, other things may be needed. I have a simple set up with gas furnace, and external AC. This is controlled by a 4 wire thermostat. However, apparently there are many kinds of furnace controls, so it is definitely the case that one size does _NOT_ fit all. Also, bear in mind while wiring that "Many thermostats short together Y and W when the fan switch is in the auto position." On my simple, 4 wire system, I had to wire the fan from the real thermostat through the NC position of my fan relay so that when I switch the fan on, the AC doesn't automatically come on. Questions, comments, etc - email email@example.com