More and more hackers and engineers are learning the value of Twitter’s microblogging platform and this Tweeting Cat Door is another such great feat that will update you the status of your cat door. Whether your cat is leaving town or coming home with his/her friends, you will be sure to be tweeted if they go through the cat door.
Here’s a screenshot of the updates on the Tweeting Cat Door, you can follow @GusAndPenny.
Each cat has a small RFID tag on the collar. When a cat is in the close proximity of the door, a small RFID reader reads the tag and if the cat is authorized, a servo will unlock the cat door. The RFID reader and the servo controller are connected to an old laptop. The software on the laptop is written in Delphi and for each “cat door event” is sending a Twitter message and a picture to twitter.com