Hardware and software requirements

First, let's see what are the required components for this project.

For once, we are not going to use an Arduino Uno board, but an Arduino Yun. Not only do we need Wi-Fi connectivity but also the on-board USB port of the Yun. This will make it really easy to use a USB camera with our project.

The following is the Arduino board that I used for this project:

Then, you need a USB camera. You need a camera that is compatible with the USB Video Class (UVC). Basically, most recent USB cameras are compatible with this standard. I recommend the Logitech C270 USB camera that I used for this project:

Finally, you will also need a PIR motion sensor, to detect whether there is motion in front of the camera. Any brand will be fine, you just need it be 5V-level compatible. This is the sensor that I used for this project:

Finally, here is the list of all the components that we will use in this project:

• Arduino Yun (http://www.adafruit.com/product/1498)
• USB camera (http...