Android Thermostat

[Matthew Berry]

Now this is just sweet

http://androidthermostat.com/

great way to recycle phones

[Jason Axelson]

Wow, that looks really nice. Now I wish I had AC in my apartment so I
could play with it.

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[Matthew Badeau]

I looked at the assembly instructions. It looks pretty easy to make. The IOIO is a bit more expensive than other microcontrollers though.
I'm going to add this to my list of projects to build in the future.

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[Matthew Berry]

I havn't looked that close at it.

How hard u think it'd be to use a different microcontroller? I know there's some android SDK stuff.

-- Matt Berry

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[Matthew Badeau]

I didn't see a link to source code, so I'm not sure of the difficulty level of swapping them out.  I would have to look at the datasheets too to find out what protocols HVAC systems use.

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[David Cornejo]

I think it's as simple as two pairs of contacts: one pair heats, the other cools.  At it's simplest, a thermostat turns on the heat when it's cold and the AC when it's hot. With a thermistor and a relay you should have all the hardware you need.

The fun part comes from writing software that regulates the temperature best and most efficiently (probably trickier than it seems). Then you add scheduling software and a net connection so you can control it remotely.

You would actually learn a lot from writing the temperature control algorithm about real world control. It's very easy to write something that oscillates wildly :-)

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