The Hardware Of Jarvis: Sensors

With the development of Jarvis seeming to ramp up, I’m going to start getting into the development of hardware additions. After reading a series of blog posts by Rob Tennyson on building wireless sensor networks (, I decided that is the way I would go.

Then it dawned of me, instead of actually telling Jarvis that I am going to bed, like my prototype is setup right now, I would build something very similar to this wireless sensor setup, but have it be a single button arduino setup, that when pressed, sends a signal to Jarvis that I’ve gone to bed, then keeps track of the fact I’ve pressed it, so in the morning when the alarm goes off to wake me up, I can press it again it sends a signal that I’m awake, stopping the alarm and starting the “wakeupHandler” script that I’ve built.

Anyway, back to the original post idea. Wireless Sensor Building. The whole idea is to have a temperature sensor in each room of the apartment, and possibly one out front of the apartment. The end result I’m hoping for is to have Jarvis monitor the temperatures in each room and ensure the temperature stays above a threshold (i.e. 70 degrees), or a relative temperature to outside.

My hope is to get a hold of x10 hardware that controls a heater module, so Jarvis can communicate with the module in a room and only turn on the heater when it decides, rather than the heater kicking on by itself.

I’m also hoping to figure out how to use an IR (infrared) blaster to send commands to my Air Conditioner in the summer, but that’s down the road a bit.

Another neat feature I think would be fun to have is a series of sensors that monitor movement, if I’ve “logged out” of the apartment (for example, I leave for work) and the apartment is in “away” mode, if movement is detected, Jarvis can send me a tweet, instant message and email telling me which zone (or room of the apartment) that movement has been detected. At some point, I’d like to get cameras that will snap a picture when movement is detected and send it to me, along with an audible alarm, letting the person know the apartment is in “away” mode and that all of their activity will be noted and monitored.

Of course, the first step in this project is to really get hands on with the hardware that I will need, so it may be awhile before I can actually build my first sensor and once I get  it built, I will just duplicate the process a few times to create my network of sensors.

More to come on this

Thanks for reading!



If you have seen Iron Man, Iron Man 2 or The Avengers then you have heard/know of Tony Stark’s digital butler Jarvis. He has control of everything in Tony’s home and Iron Man suit. The technology doesn’t exist to have such a butler, but the technology is available to build something very close to it.

As of October 2012, I haven’t made any additional changes to Jarvis because right now he resides on my laptop, which isn’t sufficient for me to run Jarvis on 24/7 without issue. I am in the process of getting Money put together for me to buy a new Mac Mini to continue the development of Jarvis.

As of December 2012, Development of Jarvis has started up again, I have been working on getting a more in depth weather forecast from Jarvis, which is working out pretty good, and because of recent changes to Twitter you can no longer use apps like Twitterrific or TweetDeck to post to Twitter, so I’ve decided that communicating with Jarvis through Twitter will remain a one way street, for now. I’ve setup Jarvis to use tweetymail to post to twitter and it appears to work great so far.

A few things I’m going to be working on and that I’m pretty excited about is the hardware side of Jarvis, so far I have been investigating the use of an Arduino to develop a couple of things. First, a RFID scanner to basically log in and log out of the apartment, turning off lights and such, and a wireless weather station so Jarvis doesn’t need internet to get the current weather.

I will be updating this page with videos and examples of what I have come up with for my own Jarvis.

So far some of the features include:

  • Wake up message that includes the current date and time, and weather for the day.
  • Checking my Agenda and then checking each part of the agenda, for example if I have 2 meetings in a day, I can have it read off each meeting title and time it will occur.
  • Communicate via Instant message, right now only AIM, TXT Message and sends me tweets with weather information.

I will include more videos as I get the time to make them.

More to come!