The EZ Dog Feeder allows you to keep track of the amount of food in your dog's bowl from anywhere just with your phone, and lets you restock his food if it looks like he's running low. In addition, you can view what he's up to through a live feed through a video connected to the smart feeder.
A demo can be found here.
The phone UI has two halves, the food bowl indicator and the live feed video. The live stream portion is relatively self explanatory. As for the food bowl portion, it shows the remaining food and the last fed time. As the food decreases in the bowl, the amount of food shown onscreen also decreases, so it's easy at a glance to see if man's best friend is starving. Clicking that icon in the corner sends the message to refill the bowl (currently only changes the time for both device and phone). The simulator screen is relatively basic, with only a feed button and a last fed indicator. This is because if you're able to interact with the feeder screen itself, then you must be in close proximity to your dog to see him and how much food is in his bowl.
Simulation was done by spoofing images for the camera (still taken in chunks through a serial port as would be normally), and using an analog slider which represented percent of food remaining (this is quite different, as in reality I'd probably utilize a digital scale). The device polls the sensors twice a second, and the phone polls the device twice a second as well (Note: I couldn't figure out how to lock variables, so the device crashes rarely due to polling and writing at the same time.)
Credit to http://www.flaticon.com/free-icon/food-for-pet-add-symbol_40566 for the + dog bag icon and www.buzzfeed.com/mattbellassai/the-40-greatest-dog-gifs-of-2012-6z51 for the sunglasses dog gif.
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