SByke

Indeed. Pretty slick. The 1-wire interface is intended for long runs and you can chain quite a few sensors on the same run. They even scavenge power from the data line. Each has a unique 64 bit ID and there's a linux driver for the 1-wire interface. So once you have the driver running and pointed at the right GPIO pin you can just read cat /sys/whatever to get the temperatures for each sensor. So they are pricier, but all in all if they are good fit for this project.

Plan: 1. Enable turning on attic fan when inside, outside, and attic temperatures indicate it's beneficial 2. Open Garage door when a crypto signed request is made 3. Send XMPP/Email and sound buzzer when garage door is open too long. 4. Leave expansion for future sensors, monitoring, and control. Pasts list: * Beaglebone Black * http://www.amazon.com/gp/product/B0057OC5O8 Relay to control fan, and garage door open/close, and buzzer. * QTY 3 https://www.sparkfun.com/products/11050 1-wire temp sensors to monitor attic, inside, and outside temps. To allow monitoring when best to turn on fan. * Wifi, any difference in reception? Anything better out there? http://www.adafruit.com/products/1012 * QTY 2: One for door up, one for door down, to help make sure it never gets confused: http://www.amazon.com/gp/product/B0009SUF08 * buzzer (hopefully audible from inside the house). http://www.radioshack.com/product/index.jsp?productId=2062397 * 5V/2000mA UL listed power adapter http://www.adafruit.com/products/276 Questions: * Anything obvious missing? * Should everything be compatible/relatively easy to integrate? * Any suggestions for where to get a few hundred feet or wire for handling things like the temp sensors, magnetic switches, and to replace the existing garage door opening switch? * Any better parts than the above? Especially the buzzer. * Any nice project cases with a few audio/rj11/rj45 built in to enable easy pluggable connections to 4 to 8 low voltage data lines? Comments? Suggestions? Links to similar projects? Oh I did find this one based on a Rasberry Pi: http://ryanfx.blogspot.com/2013/06/raspberry-pi-powered-android-controlled.html