Cat detection sensor: The concept is that when a cat enters the home and start eating in the kitchen milk or fruits, the sensor starts detecting the cat's face and multiple photos are taken and it is taken to the cloud storage and once it is stored, the URL of that link is then sent to the user's computer and it is displayed on the web browser.

Detect motion (Use Johnny-Five IR.Motion obj)
Take photos (Raspistill, command line tool)
Cat facial detection (KittyDar)
Store the photos in cloud storage (Cloudinary)
Publish the data (URL) to PubNub for realtime streaming
Stream on web (subscribe the data from PubNub)

In addition the sensor also gives a continuous beeping sound that attracts the people inside the home to stop the cat.