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Petbuddy v0 Demo units
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Materials:
1. raspi
   - webapp repo must be cloned on to this
   - network needed, wifi or ethernet or ethernet over usb
   - 1 usb port for the camera needed (so for pi zero a usb hub is needed)
2. network
3. servo - Futaba S3003 Standard Servo or similar
4. dollar store plastic jar with screw on lid
5. cheapo ebay usb webcam

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Webapp:
1. git clone the repo
2. from outside the repo directory do:
   $ virtualenv petbuddy-v0-demo/
   $ cd petbuddy-v0-demo
   $ . bin/activate
   $ pip install Flask
4. Need to install RPi.GPIO library
   - First need python-dev, without it the library will not build properly:
     $ sudo apt-get install python-dev
     $ pip install RPi.GPIO
     
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Video stream using Raspi cam:
Some people have made a open source project for this.
 - Documentation: http://elinux.org/RPi-Cam-Web-Interface
 - github: https://github.com/silvanmelchior/RPi_Cam_Web_Interface

You can run this server in the background and tie it into the petbuddy system.

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Gotchas:

If you get an error when running the app that looks like this:
	socket.error: [Errno 98] Address already in use
then change the port in this line:
	app.run(host='0.0.0.0', port=8070, debug=True)
to something that might not be in use.

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Raspi setup:
On pi zero, the usb wifi dongle gets the wlan0 interface renamed by the kernel driver.
To fix this, just do: 
  $ dmesg | grep -i renamed
And then change all mentions of wlan0 in /etc/interfaces file to whatever the wlan0 was
renamed to.