Disable Serial console login via Raspi-Config - select advanced menu

sudo raspi-config

sudo nano /boot/config.txt

change

enable_uart = 0 

to

enable_uart = 1   

sudo apt-get install minicom

sudo apt-get install python-serial

reboot

Win32DiskImager says SD card too small even though I'm trying to write an 8gb image to an 8gb SD card

Use SDImager.exe instead.  It will write disk image until it runs out of room on the SD card.  Most Linux images have blank (allocated) space at the end of the image so normally the unwritable data is not important.

https://sourceforge.net/projects/sdimager/

Forget Energenie's own sample.  See http://bennuttall.com/whats-new-gpio-zero-v1-2/

https://pypi.python.org/pypi/energenie

from energenie import switch_on, switch_off
from time import sleep

# turn all plug sockets on and off
switch_on()
switch_off()

# turn a plug socket on and off by number
switch_on(3)
switch_off(3)

sudo apt-get install python-pip
sudo pip install energenie

sudo apt-get install mysql-client python-mysqldb -y