How-To Geek

Repurpose an Old Android Phone as a Thermostat

If you’re interested in setting up a smart thermostat but put off by the high price of models like the Nest Learning Thermostat, this DIY project uses an old Android phone and a little DIY wiring to automate and network your home heating and cooling.

What the project lacks for in terms of a polished off-the-shelf presentation, it certainly makes up for in versatility. Check out the above video to see Android Thermostat in action then hit up the link below for more information about the project–including the source code, build schematics, and more.

Android Thermostat [via Hack A Day]

Jason Fitzpatrick is a warranty-voiding DIYer who spends his days cracking opening cases and wrestling with code so you don't have to. If it can be modded, optimized, repurposed, or torn apart for fun he's interested (and probably already at the workbench taking it apart). You can follow him on if you'd like.

  • Published 10/16/12

Comments (4)

  1. Ryan

    I have to say this is pretty awesome. Kind of like and open source Nest thermostat.

  2. zmarsh

    I really like the idea of controlling my home from anywhere. Nest looks pretty cool. Iris is less sexy, but includes a home security option. This project seems fun. What are some other means of controlling and/or securing my home (on my own=without paying for service)? Is there anything really cool I should wait for?

  3. Smartron

    This looks promising, this not so much so…

    The most alarming item at Microsofts booth was its six-room mock-up of
    an American house with Microsoft products – cars phones, TVs, games,
    appliances – in every nook and cranny. It’s only a matter of time before
    you’ll see people rebooting their toasters.

    Hopefully there will come the day when driving up to the cabin your car will be in comunication with the thermostat. It will check the temp, your travel time, adjusts as needed so the cabin will be at the correct temp when you arrive. In a perfect world it could be a rental, not “your” cabin. It is comming, it is only a matter of time. My wife is an owner in a huge (world wide) timeshare. Think about the engery savings if the themostat knew exactly when the guest would arrive.

  4. Tom

    This guy should KickStart a project to compete with Nest. :-)

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