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.
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.
* 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?
* QTY 2: One for door up, one for door down, to help make sure it never gets confused:
* buzzer (hopefully audible from inside the house).
* 5V/2000mA UL listed power adapter http://www.adafruit.com/products/276
* 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: